André Kostolany

As of 2026-07-18T10:19:51Z, Andre Kostolany is deceased. The Bibliotheque nationale de France authority record gives his death as 1999-09-14 in Paris and describes him as a banker and specialist in stock-market operations; Deutsche Biographie lists him as a financial expert/adviser. This file is a Task B philosophy reconstruction from direct interviews, publisher records, book excerpts, FIDUKA context, and adverse modern commentary rather than an audited manager-return record (BnF, 2025; Deutsche Biographie, 2026).

Core worldview

Kostolany's worldview starts with identity. He did not primarily present himself as a portfolio manager, economist, or broker. He called himself a speculator: an independent, experienced observer trying to profit from coming changes in securities, interest rates, currencies, politics, and mass psychology. Ullstein's author biography places his career start in the 1920s at the Paris Bourse and says he later worked at all major exchanges; a 2023 reprint excerpt from Kostolanys Wunderland von Geld und Boerse has him ending the preface with the declaration that he did not want to be a banker but was a speculator and exchange man (Ullstein, n.d.; FinanzBuch Verlag excerpt, 1982/2023).

The market, for him, was not a clean weighing machine. It was a social institution where money, credit, expectation, political fear, greed, boredom, forced selling, and fashion collide. In WELT's 2000 pre-publication excerpt from Die Kunst, ueber Geld nachzudenken, he described the exchange both as a casino-like theatre and as the "motor" of capitalism because speculation mobilizes savings into risky enterprise. The same excerpt framed the whole stock-market problem around supply and demand for securities: prices depend less on reported good or bad news itself than on whether holders are forced or eager to sell and whether buyers are forced or eager to buy (WELT, 2000).

His central medium-term market equation was "Geld + Psychologie = Tendenz": liquidity plus psychology determines trend. Money is fuel; psychology decides whether that fuel is used. If both are favorable, markets rise; if both are unfavorable, they fall; if one offsets the other, the market is listless. This is why he could say that good economic news can push stocks down when investors infer higher central-bank rates, and bad news can lift stocks when investors infer easier money (WELT, 2000; BR Alpha-Forum transcript, 1998).

Yet Kostolany was not a pure short-term sentiment trader. He distinguished between the long-term "background music" and the market's shorter swings. Over decades, he believed peace and economic development matter, and that stock prices cannot permanently detach from corporate earnings and economic growth. His dog-and-master metaphor was designed to show that economy and market do not walk in a straight line together, but the market eventually returns toward the economic path (WELT, 2000).

The practical synthesis is this: the public market is rational enough over decades to reward ownership of productive businesses, but irrational enough over months and years to reward the investor who understands liquidity, policy, crowd emotion, and the difference between news and expectations. That makes Kostolany closer to a market psychologist and macro-inflected contrarian than to a balance-sheet value investor in the Graham tradition.

The edge - what they believe(d) markets misprice and why

Kostolany believed markets misprice urgency. Prices overshoot when securities migrate from patient holders to weak, leveraged, or emotionally pressured holders, and they undershoot when forced sellers must liquidate while patient capital is scarce. In his "Hartgesottene" versus "Zittrige" framework, the hard-boiled holders have money, thought, patience, and luck; the shaky holders react to fashion, credit pressure, tips, and immediate discomfort. The question is not simply whether news is good, but whose hands own the securities when the news arrives (WELT, 2000).

He also believed markets misprice consensus knowledge. In the WELT excerpt on information, he said the headlines, earnings reports, estimates, and statistics available to everyone are already embedded in prices. The valuable material is the implication between the lines: what event the market has already discounted, what it has not yet imagined, and how the public is likely to react when the future becomes a fact (WELT, 2000).

A recurring edge was the gap between ordinary logic and "Boersenlogik." The BR interview gives the clean example: lower unemployment is good for the economy over time, but can be bad for stocks in the short or medium term if it triggers expectations of rate hikes; weaker economic news can lift stocks if investors expect monetary easing. The crowd often reacts to the visible first-order event while the speculator asks what the event changes about money, rates, and future demand for securities (BR Alpha-Forum transcript, 1998).

Another edge was time-horizon mismatch. Kostolany's favorite anecdotes are not quarterly earnings beats. They are long waits: Chrysler purchased near bankruptcy, German foreign bonds bought after World War II, and old Russian state paper held for decades. The exact profit figures in the BR interview are self-reported, but the philosophy point is well supported: he wanted situations where a long political or business normalization could turn hated paper into valuable paper, and where the investor had enough capital and patience not to be shaken out (BR Alpha-Forum transcript, 1998).

Finally, he believed markets misprice popular excitement. The phrase "Steigt die Boerse, kommt das Publikum" captures his view that broad public enthusiasm is late-cycle evidence, not comfort. WDR later framed his 1998 warnings about Germany's Neuer Markt as prescient: the segment reached its high in March 2000, then collapsed amid insolvencies, accounting scandals, and delistings before being dissolved in 2003 (BR Alpha-Forum transcript, 1998; WDR, 2017).

Process: idea sourcing -> research -> valuation & entry -> sizing -> portfolio construction -> sell discipline

Idea sourcing. Kostolany's idea sources were broad and informal by design. In his WELT excerpt on the speculator's tools, he said he found information everywhere and explicitly excluded bankers, brokers, analysts, and economists from his trusted source list. The point was not that professionals never know facts; it was that their recommendations are often entangled with consensus, promotion, or institutional incentives. Newspapers mattered, but only if read for hidden implications rather than obvious headlines (WELT, 2000).

The search process was top-down before it was security-specific. He watched war and peace, credit policy, interest rates, inflation response, international politics, new-issue supply, investor positioning, and the psychological temperature of the public. His 1998 account of the 1987 crash and recovery attributed the subsequent market advance less to a narrow stock thesis than to geopolitical detente between the Soviet Union and the United States. Whether one accepts that interpretation or not, it shows how he generated ideas: identify the coming change in the world that the market had not yet digested (BR Alpha-Forum transcript, 1998).

Research. Kostolany's research was less spreadsheet modeling than historical, political, and psychological pattern recognition. He believed a speculator needs experience, sovereign thought, and an ear for the market's "music." In the BR interview he told would-be market people to study mass psychology, citing Gustave Le Bon, because the exchange is determined by collective reactions as much as by economic facts (BR Alpha-Forum transcript, 1998).

He did not ignore fundamentals, but he distrusted accounting as a timing tool. WELT's liquidity excerpt has him saying balance-sheet figures often matter little for market decisions because they are backward-looking and may be managed by company directors. The long-term fundamentals still mattered: a market cannot rise forever without economic growth and corporate earnings. The distinction is timing versus destination. Accounts can help locate destination; liquidity and psychology decide the path (WELT, 2000; WELT, 2000).

Valuation and entry. Kostolany did not leave a reproducible DCF or multiple discipline in the public sources reviewed here. The entry rule was qualitative: buy when pessimism, forced selling, or neglect leaves securities in weak hands and when the investor has a reasoned "vision" for normalization. His German foreign-bond anecdote is the clearest example: he bought paper trading far below nominal value because he believed postwar Germany would recover and honor obligations; when the price fell further, he bought more and waited. The monetary numbers are self-reported, but the entry logic is explicit (BR Alpha-Forum transcript, 1998).

For ordinary investors, his entry advice was simpler: buy a diversified international basket of first-class stocks, preferably with surplus money that can be left alone for years. The "sleeping pills" maxim is often quoted in a simplified form, but the BR transcript itself specifies an international palette, blue chips, years of sleep, and money not needed soon. Gottfried Heller, his partner at FIDUKA, later argued that the common "you will be rich" version is an over-categorical distortion; he heard Kostolany frame it as a solid international equity basket plus panic control (BR Alpha-Forum transcript, 1998; Heller, 2020).

Sizing. No precise percentage sizing formula was found. Reconstructable sizing principles are qualitative: use fully paid securities, avoid money needed for living expenses, diversify if you are an ordinary investor, concentrate only when you have experience and the financial capacity to wait, and keep enough liquidity or emotional reserve to survive being early. In 1998 he said he owned many positions held for 15, 20, 30, and 40 years; in a WELT excerpt he said he then owned more than 500 different stocks and had moved closer to the investor camp because he was too old and busy to speculate actively (BR Alpha-Forum transcript, 1998; WELT, 2000).

Portfolio construction. Kostolany separated the player, the investor, and the speculator. The player seeks small short-term price moves and, in his view, normally loses. The investor owns broad, high-quality equities for decades and often does best on average. The speculator stands between them: he builds an intellectual construction around rates, credit, politics, growth, and expectations, then holds securities long enough for that construction to be tested. This taxonomy implies two different portfolios: a broad blue-chip basket for most people and an opportunistic cross-asset book for the trained speculator (WELT, 2000).

FIDUKA is part of the institutional context, but later FIDUKA performance should not be imputed to Kostolany without records. The firm says it was founded in 1971 and shaped for decades by Gottfried Heller and Kostolany, who gave seminars, lectures, and columns; the Kostolany stock-market seminars began in 1974 and still bear his name. This supports his role as educator and adviser, not an auditable personal composite (FIDUKA, n.d.; FIDUKA, 2026).

Sell discipline. The sell rule is embedded in the "Kostolany egg." In every bull or bear move he saw correction, accompaniment, and exaggeration. Buy in the exaggeration downward and early recovery, accompany the middle, and prepare to sell into euphoric public participation. When securities have moved from the hard-boiled to the shaky, and the shaky are even buying on credit, the next negative liquidity turn makes collapse likely (WELT, 2000).

He also sold, or refused to buy, when the market became promotional rather than speculative. In the New Market passage, he attacked bank and media promotions, thinly traded stocks pushed onto the public, and analysis that existed to distribute paper. He insisted that he did not give tips and rejected the guru label because a guru implies infallibility (WELT, 2000; Tagesschau, 2024).

Risk management

Kostolany's primary risk control was unforced patience. The four Gs were Gedanken, Geduld, Geld, Glueck: thought, patience, money, luck. Money matters because patience is not merely a virtue; it must be financed. His aphorism that two times two equals "five minus one" expresses the same risk rule: the thesis may be right, but not immediately, and the interim pain arrives before the money (BR Alpha-Forum transcript, 1998).

The second risk control was avoiding leverage and time-expiring instruments. In the BR interview he called options and derivatives gambling for buyers, said he forbade friends from buying derivatives, and described derivative success as luck because expiration forces precise timing. He did not claim derivatives threaten the whole system; he said the danger falls mainly on the buyer who can lose the capital committed. That is narrower and more precise than a blanket anti-derivatives stance (BR Alpha-Forum transcript, 1998).

The third risk control was matching advice to the investor's life. He would not give a generic recommendation to a "normal citizen" without knowing age, social position, profession, and financial circumstances. At the end of the BR interview he advised equities only for people with surplus money not needed for coming years, while saying a young couple with little spare cash should invest in their children's education rather than speculate (BR Alpha-Forum transcript, 1998).

The fourth risk control was being careful with sources of advice. He treated many tips as inventory-distribution devices. In WELT's "Handwerkszeug" excerpt, he compared stock tips to a restaurant owner's recommendation for what needs to be sold, and criticized bank or syndicate promotion masquerading as analysis. The risk is not just a wrong idea; it is becoming someone else's liquidity (WELT, 2000).

There is no evidence here of a modern institutional risk framework: no VaR limit, stop-loss rule, position-size formula, factor budget, or written drawdown policy. His system was craft discipline: own paid-for securities, size to survival, avoid near-term liabilities, distrust promotion, diversify if you are not a professional speculator, and remember that luck is part of the equation.

Temperament & psychology

Kostolany's temperament ideal is calm independence with a taste for being early. The successful speculator needs an idea, the stubbornness to hold it through ridicule, and the humility to know luck still matters. His public persona was witty, theatrical, and aphoristic, but the psychology underneath is sober: the hardest pain is not always loss, but watching a market rise without you; the most dangerous impulse is to join the crowd late because others have made money (BR Alpha-Forum transcript, 1998).

He saw emotional control as a social advantage. If most participants sell because they need money, fear embarrassment, or cannot bear underperformance, the person with capital and nerves buys from them. In the 1987 crash discussion, he framed the winners as those who had fully paid securities and enough calm not to be forced through the same narrow door as everyone else (WELT, 2000).

He also valued lived experience over academic credentials. In the BR interview he said his stock-market teachers were the market, life, and people, and he was openly dismissive of economists' tendency to miss market psychology. That anti-academic posture is part strength and part limitation: it encouraged independent interpretation, but it can also make the philosophy hard to falsify or systematize (BR Alpha-Forum transcript, 1998).

Public teaching was central to his temperament. Ullstein, Tagesschau, and FIDUKA all frame him as author, speaker, columnist, educator, and entertainer. The style mattered because he was trying to make markets memorable to ordinary readers. The danger is that memorable sayings can outlive their conditions, especially when reduced to quote-card investment advice (Ullstein, n.d.; Tagesschau, 2024; FIDUKA, 2026).

Evolution over career

The early Kostolany was a roaming cross-asset speculator. The 1982 text excerpt lists activity across equities, sovereign bonds, convertible bonds, currencies, commodities, and both rising and falling markets, from Wall Street and Paris to Frankfurt, Zurich, Tokyo, London, Buenos Aires, Johannesburg, and Shanghai. It presents speculation as adventure, independence, and a way to read the political economy of an era (FinanzBuch Verlag excerpt, 1982/2023).

By the late-career German texts, the voice becomes more didactic. He is classifying market participants, formalizing money-plus-psychology, drawing the cycle egg, warning against day trading and promotional new issues, and advising most ordinary readers to act more like investors than speculators. WELT's 2000 excerpt has him saying he himself had moved toward the investor camp, owned more than 500 stocks, and mostly bought more rather than selling (WELT, 2000).

The posthumous reception pushes this investor side even harder. Tagesschau's 2024 anniversary piece highlights the sleeping-pill advice, the four Gs, patience, and the fact that he recommended no single stock. Heller's 2020 defense likewise emphasizes that the sleeping-pill example meant a diversified international stock palette and panic resistance, not blind faith in any fashionable stock or segment (Tagesschau, 2024; Heller, 2020).

The institutional context also evolved. FIDUKA says he and Heller shaped the firm from its 1971 founding and educated investors through seminars and columns; EconBiz records the 1996 interview book Weisheit eines Spekulanten with Johannes Gross as a 207-page German interview volume. In other words, by the 1990s Kostolany had become less a private trader in the archival record than a public interpreter of the 20th-century market experience (FIDUKA, n.d.; EconBiz, 1996).

What they explicitly reject

He rejected day trading as a serious path for ordinary participants. In the WELT taxonomy, the short-term player tries to scalp tiny moves, trusts charts or computer programs, and is usually doomed when the market stops trending upward. Kostolany still acknowledged that players provide liquidity to the exchange; he rejected the lifestyle and sales pitch, not the existence of liquidity providers (WELT, 2000).

He rejected mechanical chartism and indicator worship. In the hard-boiled/shaky-hands excerpt, he says market "technical condition" does not mean charts, oscillators, stochastics, or similar devices. For him, technical condition means who owns the securities: strong hands or weak hands. This is a psychology-and-positioning definition, not a price-pattern definition (WELT, 2000).

He rejected tips, promotion, and analyst consensus. He distrusted recommendations from brokers and banks because they often serve distribution needs. He also disliked the guru label because it implies infallibility, and both BR and Tagesschau record his insistence that he generally did not give tips (WELT, 2000; Tagesschau, 2024).

He rejected retail options and derivative buying as investment. The BR transcript is explicit: options are for players, buying derivatives is long-run gambling, and time expiry makes the exercise resemble a lottery. He allowed that selling options against large portfolios can be a different business, but his rule for friends was: do not buy derivatives (BR Alpha-Forum transcript, 1998).

He rejected fashionable new-issue manias. The New Market passage in WELT attacked manipulation, promotional research, media hype, and thin stocks pushed to inexperienced investors. Heller later argued that Kostolany was one of the sharpest critics of the Neuer Markt and that later buy-and-hold critics misread him by pretending he would have approved those stocks (WELT, 2000; Heller, 2020).

Regimes where it thrives vs. struggles

The approach thrives in panic, forced selling, and neglected recovery. It needs a market where psychological or material pressure makes sellers urgent, where securities move into weak hands at the top or out of weak hands at the bottom, and where the speculator has spare capital to wait. Examples in his own telling include postwar German foreign bonds, distressed Chrysler shares, and the 1982-1987 cycle anatomy, though trade returns in those anecdotes remain self-reported rather than independently audited (BR Alpha-Forum transcript, 1998; WELT, 2000).

It also thrives when the long-term background is favorable: peace, broad economic development, declining or supportive rates, and enough liquidity to move from pessimism to participation. Kostolany's optimism about the post-Cold War U.S.-led order may be historically dated, but the principle is durable: the speculator should know whether the long-term music is in a major or minor key before trading the shorter cycle (WELT, 2000).

It struggles in leveraged or time-expiring instruments because the thesis clock and the instrument clock can diverge. A right idea can expire worthless if implemented through options at the wrong time. It also struggles when the investor uses needed money, borrowed money, or a temperament that cannot survive the "minus one" part of the wait (BR Alpha-Forum transcript, 1998).

It struggles in long blow-off bubbles. Kostolany can diagnose euphoria and still be early; the New Market kept rising before it collapsed, and being correct too soon can be psychologically or financially hard. WDR's retrospective says critical voices were overheard before the segment reached its March 2000 peak and later collapsed; that is exactly the regime where contrarianism is right on substance but difficult on timing (WDR, 2017).

It also struggles when the sleeping-pill maxim is turned into blind buy-and-hold. Stefan Mittnik's 2020 Scalable Capital critique argued that a literal version can fail badly if applied to the wrong stocks, sectors, or index constituents, citing Neuer Markt casualties, Deutsche Telekom, and index churn. His 2017 critique added the psychological difficulty of enduring large DAX drawdowns. Those critiques are partly answering a simplified quote, but they are useful warnings: Kostolany's patience rule requires diversification, surplus capital, and avoidance of mania, not mere inactivity (Scalable Capital/Mittnik, 2020; Scalable Capital/Mittnik, 2017).

Tensions between stated philosophy and actual behavior

The first tension is speculator versus investor. Kostolany celebrated speculation as independent thought and one of life's great adventures, yet late in life he said most readers should join the investor camp, own broad blue-chip portfolios, and stop trying to trade. This is not necessarily inconsistent; it may be his honest recognition that true speculation requires rare temperament and capital. But it means students should not confuse his personal profession with his mass-market advice (WELT, 2000; BR Alpha-Forum transcript, 1998).

The second tension is aphorist versus implementable system. His sayings are memorable because they compress experience, but compression can remove the conditions. The sleeping-pill advice is safe only when it includes international diversification, quality, years of surplus capital, and resistance to panic. Heller's 2020 defense of Kostolany is useful precisely because it shows how quickly a nuanced rule became a slogan that later critics could attack (Heller, 2020; Scalable Capital/Mittnik, 2020).

The third tension is anti-guru humility versus public guru status. Kostolany denied infallibility and said he did not give stock tips, but he became a celebrity teacher, columnist, seminar figure, and "Borsenaltmeister." Tagesschau calls out the paradox: he recommended no single stock and still became a legend. That made him influential, but it also made quote-laundering and hero worship likely (Tagesschau, 2024; Ullstein, n.d.).

The fourth tension is psychology-first doctrine versus thin performance verification. Many of the most vivid wins are self-reported: Chrysler, German foreign bonds, old Russian state securities, and forecasts around 1987. They are useful for philosophy because Kostolany himself used them to explain his process; they are not a substitute for an audited return series. This canon should therefore treat him differently from an institutional manager with public fund accounts (BR Alpha-Forum transcript, 1998; Ullstein, 2022).

The fifth tension is conviction versus attachment. Heller's 2008 WELT interview, republished on his site, says he and Kostolany held high-yielding U.S. "Ronny-Bonds" too long in the early 1980s and missed part of the equity upswing because they had fallen in love with the idea. That is the exact failure mode his philosophy warns against: the independent idea becomes a possession rather than a hypothesis (Heller interview, 2008).

The final tension is negative-source caution. Targeted public-web searches in this run did not find usable evidence of SEC, DOJ, BaFin, or court enforcement against Kostolany personally, but that is a bounded negative search, not a legal clearance. The more relevant adverse evidence is practical rather than legal: no audited composite, simplified quotes, public-mania timing risk, and the possibility that his craft wisdom becomes dangerous when copied without its capital, diversification, and temperament constraints.

Executive finding

This research located no audited personal return series, account statements, position ledger, benchmark, or continuous record from which a conventional "greatest trades" ranking can be built. What survives is a mixture of first-person interviews, memoir-derived excerpts, a close associate's recollections, and later retellings. The six cases below are therefore ranked by documentability, not by verified profit. The largest trade by absolute P&L cannot be identified; the Young bond ranks first only as the best-documented case. A quoted multiple is a raw reconstruction of the stated endpoints, not an audited or annualized return. (DIE ZEIT, 1983)

The single best-supported trade story is the postwar purchase of the French-franc tranche of the Young bond. In a 1998 interview, Kostolany himself called German foreign bonds his best bond coup and supplied an entry, an adverse move, a holding period, and a cash endpoint. Official German records independently establish the bond, the London debt settlement, and its unusual currency mechanics—but not his ownership or proceeds. The result is unusually specific testimony, not verified performance. (BR Alpha Forum, 1998) (German Finance Ministry, 2003)

Evidence key

• First-person, context corroborated: Kostolany described the transaction; an institutional source confirms the security or catalyst, but not his account.
• Memoir-derived, context corroborated: the transaction comes from a publisher excerpt or a posthumously published item under his byline; external evidence confirms only the setting.
• Disputed reconstruction: sources conflict on chronology or total outcome, or the surviving description is a campaign rather than a closed trade.
• Raw multiple: ending value divided by stated cost. "Gain" is that multiple minus one; fees, financing, dividends, taxes, foreign exchange, and inflation are excluded unless explicitly stated.

At-a-glance ranking

1. French-franc Young bonds: the single best-supported story

Context and thesis. Kostolany said he bought German foreign bonds on non-German exchanges immediately after the Second World War because he expected Germany to recover and honor its external obligations. His concrete example was a 1,000-franc nominal Young bond. The official history confirms that the 5.5% Young loan was issued in 1930 in the United States and eight European countries, then restructured under the 1953 London Debt Agreement with special currency and funding provisions. That establishes the instrument and the legal mechanism, not the trade. (BR Alpha Forum, 1998) (German Finance Ministry, 2003)

Entry, size, and path. He recalled buying at 350 francs per 1,000 nominal, recommending the bond to friends, and adding at 250 when it fell. The adverse move from 350 to 250 was 28.6%. He said his friends sold while he held for four years. The number of bonds, aggregate cost, coupons, financing, portfolio weight, and exact purchase and payment dates are absent. Thus even the drawdown is a security-price observation, not a portfolio drawdown. (BR Alpha Forum, 1998)

Exit and P&L. Kostolany said he collected 35,000 francs for each bond bought at 250 after the Federal Republic revalued the French tranche as though it had been denominated in dollars. Read literally, 35,000 / 250 is 140x and a 13,900% simple gain; using the earlier 350 entry gives 100x and a 9,900% gain. These are [single-source first-person; raw arithmetic] figures. They should not be annualized: the exact dates, old-versus-new-franc convention, coupon treatment, exchange rates, tax, and costs are unknown, and no redemption statement was found. The Finance Ministry confirms that Young-bond payments required repeated calculations under a special currency clause, which makes a casual modern return calculation especially hazardous. (BR Alpha Forum, 1998) (German Finance Ministry, 2003)

Lesson. The repeatable element is not "buy defaulted sovereign paper." It is to look for a security whose quoted price ignores a plausible legal or political normalization path, then size it so that a further decline does not force a sale. The non-repeatable element was decisive: sovereign policy and the settlement's currency treatment created the payoff. Skill identified the option; patience kept it alive; policy and luck determined whether it paid.

2. Chrysler: the best stock coup, still unrealized in the telling

Context and thesis. In 1998 Kostolany called Chrysler his best stock coup. He said he had bought the automaker near bankruptcy at about $3.50 roughly 15–20 years earlier, which bounds the recollected entry to approximately 1978–1983. A U.S. government review confirms that Chrysler was near bankruptcy and that federal assistance enabled a rapid operational and financial restructuring outside court. The underlying thesis was a classic turnaround: the market priced a high probability of failure, while continued operation and restructuring preserved equity optionality. (BR Alpha Forum, 1998) (U.S. GAO, 1984)

Structure and path. Kostolany gave no quantity or portfolio weight. The public record makes his split-adjusted endpoint plausible: Chrysler had 3-for-2 stock splits in 1986 and 1987 and a 2-for-1 split in 1996, so one old share became 4.5 shares. Contemporary filings also report 1998 price ranges consistent with an old-share equivalent around his stated $140–150. None of this proves his basis, continued ownership, dividends, or taxes. It merely checks that the split story is arithmetically possible. No intervening price path or maximum drawdown for his holding was located. (SEC Chrysler filing, 1994) (UPI, 1987) (SEC DaimlerChrysler F-4, 1998)

Exit and P&L. The direct interview is explicitly hypothetical: if he sold then, he said, the original $3.50 share would be worth about $140–150 after three splits, and the descendant shares' dividends exceeded the old purchase price. That is a reported unrealized price multiple of 40.0–42.9x, or a 3,900–4,186% simple price gain before dividends and costs. A posthumously published WELT item under his byline instead says $3 to about $150, implying 46.7–50x. The basis conflict makes the performance [disputed self-report; raw arithmetic]. There is no sale date or realized P&L. (BR Alpha Forum, 1998) (WELT, 2000)

Lesson. A distressed equity can have asymmetric upside when failure is priced in and financing plus operating change creates time. But this outcome depended heavily on government intervention, creditor and labor concessions, and successful products. The case supports patient turnaround investing; it does not establish that buying every near-bankrupt equity is rational.

3. Russian imperial bonds: geopolitical normalization as an option

Context and thesis. A 1991 reprint of a Kostolany Capital column says he had bought Russian imperial bonds about two years earlier near 1% of nominal, providing contemporaneous evidence that the position existed. A WELT article published five months after his death, under his byline and derived from his late work, supplies the fuller thesis and exact five-franc recollection: détente and Russia's eventual need to issue new international debt would create pressure for a settlement of defaulted imperial obligations. He asked a dealer to buy bonds issued between 1822 and 1910 at deeply distressed prices. The WELT endpoint remains posthumous and its editorial chain unresolved. (HP-Magazin, 1991) (WELT, 2000) (BnF authority record, accessed 2026)

Catalyst and path. The 1991 column reprint marks an interim rise to about 60 francs, or 12% of a 500-franc bond, but supplies no maximum adverse excursion or portfolio drawdown. The official record confirms the geopolitical catalyst while correcting the simplified story. France and Russia signed a memorandum on 26 November 1996 and a final agreement on 27 May 1997 under which Russia would pay France $400 million in eight installments; the covered claims included imperial bonds issued or guaranteed before 7 November 1917. This was an aggregate state-to-state settlement. A later Conseil d'État decision says the indemnification did not redeem the securities or deprive holders of them. Neither source identifies Kostolany or proves that a particular title he owned qualified. (HP-Magazin, 1991) (Légifrance settlement decree, 1998) (Conseil d'État, 2003)

Size, exit, and P&L. The WELT account says the agreement implied roughly 300 francs for a 500-gold-franc bond and nearly a 6,000% profit from a five-franc purchase. Literal arithmetic gives 300 / 5 = 60x and a 5,900% simple gain. That was an anticipated entitlement, not a documented cash exit. French Senate records show that Russia's installments first accumulated in a Treasury account and that holder compensation was not finalized and begun until 2000, after Kostolany's September 1999 death. The article also says payment would occur in four tranches, while the treaty specifies eight government installments. Quantity, exact titles, eligibility, estate claim, actual distribution, franc convention, fees, and portfolio weight are missing. The result is [single-source posthumous memoir estimate; raw arithmetic], not a realized return. (WELT, 2000) (French Senate, 1999) (French Senate, 2000)

Lesson. Distressed claims can behave like long-dated geopolitical options when access to capital markets becomes valuable to the debtor. The edge was a structured causal thesis, not merely cheapness. The hazards are equally clear: eligibility law, sovereign discretion, an indeterminate clock, illiquidity, and the possibility that a settlement is distributive compensation rather than contractual repayment.

4. Laurium and Mocambique: a small, leveraged first double

Context and sourcing. A 2020 FinanzBuch Verlag sample, written by Rolf Morrien and Heinz Vinkelau with a foreword by Kostolany's partner Gottfried Heller, quotes his memoir account of his first own-account Paris trade in the late 1920s. The tip came from his firm's office attendant, not from independent research. He reportedly bought two Laurium iron-ore shares for cash at about 400 francs each and 25 Mocambique mining shares on credit/for forward settlement at 30 francs each. That is about 800 francs of cash stock plus 750 francs of financed nominal exposure. (FinanzBuch Verlag sample, 2020)

Path, exit, and P&L. The source says a broad bull market allowed him to sell soon at roughly twice the entry price but reports no interim path or drawdown. Applied mechanically to the stated 1,550 francs of gross exposure, a precise doubling would produce about 3,100 francs of proceeds and a 1,550-franc gross gain: [single memoir chain; illustrative raw arithmetic]. That is only an illustration: separate sale prices, financing cost, margin posted, commissions, and dates are unknown, so return on capital cannot be computed. The source is also a secondary publisher narrative quoting memoir, not a statement or trade ticket. (FinanzBuch Verlag sample, 2020)

Lesson. This was not evidence of a durable edge. It was a tiny, partly leveraged position recommended by a colleague during a general boom. Its importance is developmental: an early favorable outcome can supply both seed capital and dangerous confidence. The financed Mocambique leg also shows why a price multiple and return on invested capital are not interchangeable.

5. Russian imperial-era shares: the second formative double

Thesis and structure. After the mining-share sale, the same office attendant reportedly suggested Russian imperial-era shares that had become nonvaleurs after the Soviet takeover. The publisher excerpt does not name the issuers, quantities, quotations, or market. Kostolany's later interpretation was adverse to his own legend: the shares rose with almost everything else, and the apparent irrationality helped persuade him that market psychology could overwhelm explanatory stories. (FinanzBuch Verlag sample, 2020)

Path, exit, and P&L. The memoir-derived account says his money doubled again and left him with $200 cash. It supplies no entry quotation, interim path, or drawdown. Read literally, the endpoint is approximately 2x and a 100% gain from an implied $100 starting amount, but currency conversion, exact cost, holding period, exit tickets, and expenses are not supplied. It is [single memoir chain; approximate arithmetic]. This should not be confused with the far later 1989 purchase of imperial Russian bonds: one was a small 1920s share trade riding a boom; the other was a sovereign-settlement thesis six decades later. (FinanzBuch Verlag sample, 2020)

Lesson. A profitable result can be analytically bad evidence. Kostolany seems to have learned the useful lesson—that flows and crowd psychology matter—but the trade itself was closer to beta, a tip, and luck than to demonstrated security selection.

6. The 1929–1932 Paris bearish campaign: profitable legs, disputed whole

Context and structure. The publisher excerpt says Kostolany turned bearish after concluding that the late-1920s rise was largely bluff. It describes profits as European markets weakened and names the collapses of the Oustric group, Devilder, and Kreuger as especially favorable to his bearish book. Banque de France research independently dates the French banking panic to late 1930–1931 and identifies Oustric's closure as part of that crisis, but it says nothing about Kostolany. The excerpt gives no contracts, strikes, counterparties, margin, notional exposure, or closes. (FinanzBuch Verlag sample, 2020) (Banque de France, 2018)

Outcome conflict. Later narratives separate a profitable 1930 short from a subsequent bearish position that was destroyed when the Hoover moratorium lifted markets. The official U.S. history dates Hoover's proposal to June 1931—not 1930, as some retellings imply. More importantly, when a 1997 interviewer asked Kostolany about Black Friday 1929, he answered that he lost all his money. No maximum adverse excursion or portfolio drawdown can be reconstructed; the total-loss statement conflicts with the profitable-leg narrative. These accounts might describe different legs, but reconciling them would be speculation. The defensible conclusion is [disputed campaign]: profitable bearish legs are memoir-supported, while net P&L, sequence, and ending capital are not. (Berliner Zeitung, 1997) (U.S. Office of the Historian, accessed 2026)

Lesson. The campaign best illustrates both the power and fragility of a macro short. Being directionally right about a collapse does not determine the return: path, leverage, financing, timing, and the decision to stay short after the catalyst matter. It belongs in the record because it shaped his reputation, but not in a numerical league table.

Calls and stories excluded from the ranking

• The 1987 crash: Kostolany said he had forecast both a sharp decline and a later recovery, but the original Capital page was not located. Heller later said "we" bought after 19 October and that the shares tripled in two years; that establishes a Heller/FIDUKA-team recollection, not Kostolany's personal lots. A public forecast, a team purchase, and a personal holding cannot be merged into one trade. (BR Alpha Forum, 1998) (Gottfried Heller, 2008)
• "Ronny Bonds": Heller said "we" held high-yield U.S. bonds too long in the early 1980s and missed part of the equity rebound. This is a useful opportunity-cost mistake, not a greatest trade, and the owning entity is unclear. (Gottfried Heller, 2008)
• Neuer Markt and other public calls: warnings can be insightful, but without a position, capital at risk, exit, and a complete forecast denominator they are not trades. Counting only the famous correct calls would introduce selection bias.

What the six cases actually show

The mature success stories share a recognizable structure: an asset priced for permanent impairment, a political or financial path that could restore value, and enough patience to wait. Yet each spectacular outcome also depended on an external intervention—the London debt settlement and currency clause, Chrysler's public rescue and restructuring, or the Franco-Russian agreement. That is not a criticism of the theses; correctly anticipating institutional action can be skill. It does mean the payoff cannot be attributed to security analysis alone. (German Finance Ministry, 2003) (U.S. GAO, 1984) (Légifrance settlement decree, 1998)

The early doubles and the disputed bearish campaign are a needed antidote to hagiography. The first two were tips during a bull market, one partly financed. The bearish book may have had large winning legs, yet the direct 1997 interview also records total loss. A 1983 contemporary review even questioned whether Kostolany ultimately made more money from markets or from books and lectures. No public evidence found in this research resolves that question. (FinanzBuch Verlag sample, 2020) (Berliner Zeitung, 1997) (DIE ZEIT, 1983)

Accordingly, the ranking supports a modest conclusion: Kostolany produced several vivid, causally coherent trade stories and at least three named securities with stated endpoints. It does not establish a verified lifetime track record, risk-adjusted outperformance, or repeatable hit rate. The durable lessons are to separate price from legal value, preserve staying power, distinguish a forecast from a funded position, and audit every spectacular multiple for currency, leverage, realization, and survivorship.

Executive finding

Kostolany's losing record is more candid than his legend, but not more auditable. No personal account statements, complete trade ledger, insolvency file, estate inventory, or continuous return series was located. The strongest evidence establishes at least one catastrophic prewar episode: he said he lost all his money, incurred enormous debts, considered suicide, and needed colleagues' help to restart. A 1997 interview connects a total loss to the 1929 crash, while later narratives divide the period into profitable bearish legs in 1930 and a subsequent wipeout after the 1931 Hoover-moratorium rally. Those accounts may describe different positions, but the surviving record cannot reconcile them. (BR Alpha Forum, 1998) (Berliner Zeitung, 1997)

The responsible conclusion is narrower than the often-repeated claim that he lost his fortune twice or went bust several times. A contemporary obituary reported two complete fortune losses; Kostolany acknowledged several failed speculations and elsewhere used the colloquial Pleite. These sources supply neither two dated balance sheets nor a court proceeding. This chapter therefore distinguishes a directly admitted catastrophe, unspecified additional failures, a team-level opportunity-cost mistake, and an early public market view from verified personal realized losses. (Tagesspiegel, 1999) (BR Alpha Forum, 1998) (Kostolany/Legimi reprint, 1972/2022)

The catastrophic episode: ruin, debt, and recovery

The most important adverse evidence comes from Kostolany himself. In a 1998 Bayerischer Rundfunk interview he recalled a prewar period when he had lost all his money, owed enormous debts, and experienced suicidal thoughts. Colleagues helped him out, after which he began again with new ideas. The interviewer then referred to multiple failed speculations; Kostolany's explanation was concise: “Ich habe die Situation falsch beurteilt!”—he had misjudged the situation. He blamed an attempt to apply ordinary economic logic to a market governed in the short run by expectations and crowd psychology. (BR Alpha Forum, 1998)

This testimony establishes severity, not a percentage loss. “All” cannot be converted into a drawdown without beginning equity, outside assets, liabilities, collateral, cash flows, or the point at which the account was measured. The debts establish obligations beyond remaining liquid capital, but the source does not state whether trading leverage was involved, or identify an instrument, lender, margin term, or exact cause. No absolute loss, percentage drawdown, recovery time, or formal-insolvency date is defensible.

It is also important not to turn a historical disclosure of suicidal thinking into colorful market folklore. The episode shows that debt and financial ruin can become a human safety crisis. His account says colleagues provided practical help before he restarted. “Stehaufmännchen,” his image of a figure that stands back up, should not obscure that support or the risk that another person might not recover from the same distress.

A different family story must not be merged into his disclosure. In Geld, das große Abenteuer, Kostolany identified his brother Emmerich as the person whose 1914 raffia speculation ended in losses and bank debt, followed by suicidal talk, before their father paid the obligation. That was an early lesson Kostolany witnessed, not André's own trade or treatment history. (Kostolany/Legimi reprint, 1972/2022)

The 1929-1931 chronology does not reconcile cleanly

When asked directly in 1997 whether he had experienced Black Friday 1929, Kostolany said he had lost all his money. That is the clearest first-person date anchor. (Berliner Zeitung, 1997)

A publisher excerpt drawing on his memoir presents a more flattering and more complicated sequence: bearish positions allegedly profited as the Oustric group, Devilder, and Kreuger failed. Banque de France research independently places the Oustric failure and the first French banking-panic wave in late 1930 and 1931, but does not mention Kostolany or verify his positions. (FinanzBuch Verlag, 2020) (Banque de France, 2018)

A later Süddeutsche Zeitung reconstruction separates a profitable Oustric short from a new bearish position that was overwhelmed by a rally after the Hoover moratorium. Official U.S. records date Hoover's proposal for a suspension of intergovernmental obligations to 19-20 June 1931, correcting retellings that place it in 1930. The official chronology validates the policy shock, not the trade. (Süddeutsche Zeitung, 2010) (U.S. Office of the Historian, accessed 2026)

Three possibilities remain: the 1929 loss, 1930 wins, and 1931 wipeout were separate legs; the dates blurred in old-age recollection; or later biographical storytelling made the campaign more coherent than it was. The evidence cannot choose among them. The campaign therefore cannot support either a clean “he made a fortune in the crash” story or a calculated net loss. What it does illustrate is path dependence: a bearish macro thesis can be broadly right while timing, policy intervention, financing vulnerability, and staying short after a profitable leg still destroy the account.

Three named commodity failures in his own record

An authorized digital reprint of Kostolany's 1972 Geld, das große Abenteuer supplies three named adverse cases absent from the later interview. They are first-person memoir evidence, not trade confirmations, and two contain chronology or classification problems. They nevertheless show more about his actual failure modes than the undated claim that he repeatedly went pleite. (Kostolany/Legimi reprint, 1972/2022)

Corn-bacon: both sides of the “sure” spread failed

Kostolany described a relative-value futures trade presented by Chicago brokers as nearly mechanical. Corn at a quoted 90 appeared cheap relative to bacon at 130, so he and others bought corn and sold bacon short, expecting the normal relationship to return. Instead, corn fell further while bacon rose. He called the defeat hard and difficult to understand. His explanation was Roosevelt's hog-reduction policy: fewer pigs reduced demand for corn while lowering future bacon supply. (Kostolany/Legimi reprint, 1972/2022)

The policy mechanism is historically plausible, but the memoir's “spring 1933” timing is loose. An official USDA historical table dates government purchases for the Emergency Hog Production Control Program from 22 August to 7 October 1933. No position size, margin, entry date, close, or loss amount appears, and the quoted 90/130 figures are not enough to calculate P&L. The durable error was treating a historical correlation as an arbitrage while ignoring policy regime change and the possibility that both legs could move adversely. (USDA livestock statistics, 1950)

Silver: a paper fortune lost, with a faulty date

In the same book, Kostolany described buying London silver after the United States offered a high official price for domestic silver. The position developed an “astronomical” paper profit, making him a paper millionaire, before a policy reversal erased the gain within 24 hours. His own classification is internally awkward: the introduction says the episode cost him substantial money, but the outcome says he had earned no money and lost only an unrealized profit. Without cost, quantity, collateral, or closing value, it cannot be classified as either a realized capital loss or a zero-P&L round trip. (Kostolany/Legimi reprint, 1972/2022)

The chronology is also wrong or compressed. Kostolany placed the Morgenthau episode in 1933, but the official Silver Purchase Act became law on 19 June 1934, and the statute's central purchase mandate belongs to that later date. The institutional event does not verify his position; it shows that precise dates in the memoir should not be accepted without an external anchor. The mistake combined policy dependence, failure to realize an enormous mark, and hindsight narration that blurred the calendar. (U.S. Statutes at Large, 1934)

Refrigerated eggs: a broker consensus met an unusually long winter

Kostolany also recalled shorting refrigerated-storage eggs in Chicago because statistics and prominent commodity brokers pointed to lower prices. An extended cold spell suppressed new egg production, increased demand for stored eggs, and drove their price up 50%. He said he lost a considerable sum, but gave no date, entry, cover, contract count, or monetary amount. The 50% move is therefore an adverse commodity-price change, not a 50% account loss. (Kostolany/Legimi reprint, 1972/2022)

This case joins the corn-bacon spread as a warning about statistical confidence. The broker forecast was not necessarily irrational; it was incomplete. Weather was a state variable with a large nonlinear payoff, and the short position left the loss open-ended until covered. Unlike his later general comments about failed speculation, this is a named case with a stated adverse move—but still no portfolio denominator.

The behavioral roots of the failure

1. A correct economic story was not enough

Kostolany's own diagnosis was not that he lacked economic information. It was that he treated everyday and macroeconomic logic as if it mapped directly and immediately into price. Markets discount expectations, respond to liquidity, and can rally on news that improves financing even while the economy remains weak. His later emphasis on mass psychology was at least partly an intellectual response to this mismatch. The causal connection is first-person; the neatness of the later doctrine is retrospective. (BR Alpha Forum, 1998)

The commodity memoir adds a second version of the same error. Precise statistics and stable historical relationships created the appearance of certainty, but policy, weather, technology, or forced liquidation changed the payoff distribution. He later called these unknowns imponderables. That concept is useful only if it changes sizing and structure; merely naming surprise after the loss does not make it controllable. (Kostolany/Legimi reprint, 1972/2022)

2. Obligations converted being wrong into possible extinction

The debt admission shows that obligations exceeded available liquid capital, although the source does not identify trading leverage or the financing structure. His mature rules moved in the opposite direction: use surplus money, retain enough capital to wait, and do not buy derivatives whose expiry can defeat a correct but early thesis. In 1998 he described his own one-off derivative profit as luck and prohibited friends from buying them. This documents his late-life risk posture, but not a proven one-to-one causal change after a named loss. (BR Alpha Forum, 1998)

3. Conviction could become attachment

Gottfried Heller supplied the clearest later adverse example. In the early 1980s, he said, “we” owned U.S. bonds yielding about 16%, nicknamed “Ronny Bonds.” They held too long, fell in love with the idea, and missed part of the equity upswing. This was an opportunity cost, not a documented nominal bond loss. The plural attribution also prevents assigning the position to Kostolany's personal account; it may have belonged to Heller, Fiduka, clients, or a shared decision process. (Gottfried Heller, 2008)

The lesson is still sharp. Patience is valuable only while the thesis and opportunity set remain favorable. A rule designed to prevent panic selling can become inertia when evidence or relative attractiveness changes. Heller's later formulation—do not fall in love with an idea—is a close associate's process lesson, not proof that Kostolany adopted a formal sell checklist.

4. Advice created a mismatch between his clock and other people's clock

Kostolany said he had bad experiences giving tips because he could wait through a fall while friends and acquaintances sold quickly. The Young-bond anecdote in the same interview is his example: friends allegedly sold after the bond dropped from 350 to 250, while he added and waited. His response was to avoid personalized tips and to make broad, conditional observations instead. This is a documented process change in communication, though it did not remove the celebrity influence of his columns, seminars, and aphorisms. (BR Alpha Forum, 1998)

Errors of omission and timing

Ronny Bonds: a foregone equity rebound, not a measured loss

No counterfactual return can be computed for the Ronny-bond episode. The securities, duration, purchase prices, coupons received, sale date, and equity basket not bought are absent. Saying the team “lost” the subsequent stock-market gain would be false precision. The defensible finding is qualitative: high current income and thesis attachment delayed a rotation and imposed an acknowledged opportunity cost. (Gottfried Heller, 2008)

Japan in 1995: an early view, not a confirmed losing trade

In July 1995 Kostolany said he could imagine putting some Japan funds into the portfolio because Japan could not keep declining indefinitely. The wording records contemplation, not execution. Japan then demonstrated how long “eventually” can last: Nikkei's official history records a fall to 12,879 in October 1998 and a post-bubble low of 7,054.98 in March 2009. (WELT, 1995) (Nikkei, accessed 2026)

This is a useful forecast-survivorship counterexample. The statement may have been directionally right over a sufficiently long horizon, yet it lacked an entry rule, valuation threshold, sizing decision, or time horizon that would make it investable. Without proof of purchase it is not a personal loss. It belongs here because famous correct calls are often remembered as trades while vague or early calls disappear from the record.

Process changes: documented, reconstructed, and not found

The mature safeguards are directionally consistent with surviving a financial failure: surplus capital creates time, diversification limits idiosyncratic ruin, and avoiding expiry reduces timing risk. But the record does not show when those rules changed, whether he followed them continuously, or how his 450-500 securities were weighted. A large number of names does not by itself prove low concentration or low leverage. (Berliner Zeitung, 1997)

The record-keeping failure behind the legend

Kostolany's claim that he was right 51% of the time and wrong 49% was reported contemporaneously, but no scored database accompanied it. It is an aphorism about accepting error, not a verified hit rate; it also says nothing about payoff asymmetry, capital allocation, or whether a few losses outweighed many correct calls. (DIE ZEIT, 1994)

His 1972 account likewise says that he had been pleite several times, then turns “at least twice” into a rhetorical definition of a speculator. This is useful first-person evidence that failure was recurrent, but it neither fixes an exact count nor proves a formal bankruptcy. Treating the aphorism as an audited two-event history would manufacture precision the memoir does not contain. (Kostolany/Legimi reprint, 1972/2022)

This absence matters because the surviving sample selects vivid wins and compresses failures into phrases such as “lost everything” or colloquial claims that he went pleite several times. A 1983 review observed that it was not possible to determine whether his market activity or his books and lectures produced more financial success. Later reports that he lost his fortune twice remain unreconciled press claims. Without the denominator—the complete population of trades and forecasts—neither the legend nor an adverse reconstruction can calculate lifetime skill. (DIE ZEIT, 1983) (Tagesspiegel, 1999)

The same discipline applies to his 1940 financial shock. A later WELT profile says he lost wealth while fleeing the Nazis. That was a grave loss, but the source does not separate market P&L from forced migration, transfer restrictions, expropriation, or abandoned assets. It should not be recast as an investment mistake. (WELT, 2006)

Current and legal boundary

A bounded public-web review through 18 July 2026 across German, French, EU, and U.S. court, regulator, enforcement, and insolvency sources did not identify a reliable personal proceeding against Kostolany or a formal personal insolvency record. This is archive-, spelling-, and jurisdiction-limited negative evidence, not legal clearance or proof that no record ever existed. It also does not turn colloquial uses of Pleite into adjudicated bankruptcy.

Fiduka's current imprint describes supervision and registrations of the firm as it exists today. Those current facts cannot be projected backward as Kostolany's personal regulatory status, nor can a current fund audit validate his historical personal trading. (FIDUKA imprint, accessed 2026)

What the mistakes actually teach

1. Survival precedes correctness. A macro thesis has no value if debt, margin, or personal distress ends the game before the thesis can work.
2. Separate thesis time from instrument time. An undated long-term idea can be unusably early; an expiring or leveraged vehicle makes that mismatch fatal.
3. Distinguish patience from attachment. Waiting through noise is not the same as ignoring changed evidence or a better opportunity set.
4. Match advice to the recipient's capital and temperament. Kostolany's ability to wait could not be transferred through a stock tip.
5. A forecast is not a position. Japan illustrates why contemplation, entry, sizing, exit, and realized P&L must be kept separate.
6. Anecdotes need a denominator. The 51/49 saying, selected coups, and unspecified failures cannot substitute for a ledger.
7. Do not romanticize recovery. Colleagues' support was part of the restart, and catastrophic financial distress is a risk-management failure with consequences beyond a portfolio.

Kostolany's most transferable achievement may therefore be less his ability to avoid error than his willingness to admit it. He described misjudgment, ruin, debt, luck, and failed ideas in public. The evidence does not prove that his later safeguards eliminated those failure modes. It does show an evolution from financially fragile, high-consequence speculation toward advice centered on surplus capital, patience, diversification, and avoiding time-expiring bets. That evolution is useful precisely when kept separate from the unverified claim of an auditable lifetime edge.

As of 2026-07-18, this is a source-controlled quotation file rather than a collection of internet aphorisms. It contains 35 short quotations from 17 underlying works or contemporaneous reports. Every quotation is 25 words or fewer, and no underlying work contributes more than 25 quoted words in total. The German is retained exactly as the cited source presents it; the English notes are interpretations, not literal translations.

Provenance matters unusually much here. Kostolany wrote in several languages, collaborated with Françoise Roussel, appeared in edited interviews, and died in 1999 before his final book appeared. The six WELT installments below are therefore treated as one authorized posthumous book serialization, not six interviews. Reporter-selected quotations are labeled as such. Spelling such as muß, süße, and Tipps follows the accessible source rather than being silently modernized.

Liquidity, psychology, and market mechanics

1. “Geld + Psychologie = Tendenz.” — authorized WELT serialization, underlying final book, 2000. This is the compact late formulation: medium-term direction depends on financing conditions and holders’ willingness to act, not economics alone.

2. “An der Börse muss man es genauso machen.” — authorized WELT serialization, underlying final book, 2000. “The same” refers to a driving instructor’s advice to look three hundred metres ahead; it is a horizon metaphor, not a security-selection rule.

3. “Jeder Computer ist so schlau wie sein Programmierer.” — authorized WELT serialization, underlying final book, 2000. Models can accelerate calculation, but they inherit assumptions and cannot remove judgment.

4. “Denn schließlich hängt alles von Angebot und Nachfrage ab.” — WELT direct interview, 1997. He used the elementary identity to resist the interviewer’s attempt to declare a decline an obvious overreaction.

5. “Ohne langen Atem soll man nicht in die Nähe der Börse gehen.” — WELT direct interview, 1997. The surrounding answer refuses a tip and makes holding capacity a precondition for participation.

6. “Der Markt ist seit Monaten ausverkauft.” — WELT contemporaneous report, 1995. This was a dated technical diagnosis of positioning, not a timeless maxim.

7. “Goldmünzen waren in der Vergangenheit einmal zehn Jahre lang überbewertet.” — WELT contemporaneous report, 1995. Mispricing can persist long enough to defeat a merely correct valuation view.

8. “Es sind große Bargeldbestände vorhanden, die investiert werden wollen.” — DER AKTIONÄR 1996 interview, reproduced in facsimile, 1996. The sentence states the liquidity side of his equity view in a contemporaneous Q&A.

9. “Die Börse ist keine Einbahnstraße, die Kurse können auch fallen.” — DER AKTIONÄR 1996 interview, reproduced in facsimile, 1996. The warning is elementary precisely because euphoric buyers tend to forget it.

10. “Man kann Währungsparitäten nicht am Grünen Tisch festlegen.” — WELT/dpa attributed statement, 1997. The direct quotation is Kostolany's; WELT/dpa attributes the adjacent political, fiscal, and social rationale to Gottfried Heller.

Time, loss, and fallibility

11. “An der Börse sind zwei mal zwei fünf – minus eins!” — BR Alpha Forum transcript, 1998. A thesis may converge only after an adverse detour; the phrase does not promise that every thesis eventually works.

12. “Zuerst kommen die Schmerzen, dann kommt das Geld.” — BR Alpha Forum transcript, 1998. He called market profit compensation for pain, foregrounding the path rather than only the endpoint.

13. “Ich habe die Situation falsch beurteilt!” — BR Alpha Forum transcript, 1998. The admission answers a question about repeated failed speculations and bankruptcies, puncturing the image of an infallible “guru.”

14. “Es wäre völlig unseriös, heute eine Prognose zu geben, deshalb werden Sie von mir auch keine hören.” — Berliner Zeitung direct interview, 1997. Forecast refusal here is evidence of uncertainty discipline, even though he made many public forecasts elsewhere.

15. “Die Börse ist etwas für Langstreckler.” — Berliner Zeitung direct interview, 1997. The same interview tied endurance to money, nerves, obligations, and the ability to survive reversals.

16. “Das ist mehr als eine Spekulation, das ist eine Explosion.” — DIE ZEIT edited interview, 1980. He was describing the gold surge, and the temperature of the language is part of the historical record.

17. “Das Goldfieber ist fast eine Epidemie.” — DIE ZEIT edited interview, 1980. The metaphor identifies social contagion, but it should not be mistaken for a measured bubble indicator.

18. “Wer viel Geld hat, kann spekulieren; wer wenig hat, darf nicht spekulieren; wer gar keines hat, muss spekulieren.” — authorized sample of Kostolanys Wunderland von Geld und Börse, underlying work 1982. The paradox distinguishes affordable risk, vulnerable savings, and desperation; it is rhetoric, not suitability advice.

19. “Spekulant und Börsianer: Das bin ich!” — authorized sample of Kostolanys Wunderland von Geld und Börse, underlying work 1982. He embraced “speculator” in its reflective, long-horizon sense while rejecting both banker and finance-minister identities.

Thought, information, and independent judgment

20. “Spekulieren ist geistige Gymnastik.” — authorized preview of Geld, das große Abenteuer, underlying work 1972. The phrase presents speculation as continuous synthesis rather than passive receipt of tips.

21. “Man soll nicht alles wissen, sondern alles verstehen und im passenden Augenblick die Zusammenhänge richtig deuten und entsprechend handeln.” — authorized preview of Geld, das große Abenteuer, underlying work 1972. Breadth, proportion, timing, and action matter more than encyclopedic recall.

22. “Bei der Aufstellung eines Spekulationsplans spielen alle möglichen Faktoren eine Rolle, von denen manche einem wirklichen Sprung ins Ungewisse gleichkommen.” — DIE ZEIT bylined article, 1961. This early wording makes uncertainty explicit even in an article arguing that bonds can be easier to analyze than stocks.

23. “Ich war um so neugieriger, als ich mit den Kreuger-Aktien stark auf Baisse spekuliert hatte.” — DIE ZEIT bylined article, 1961. The sentence is first-person position testimony, not account-level proof of size or profit.

24. “Es war kein Spaß, sondern nur Phantasie.” — 1991 HP-Magazin reprint of a Capital column, 1991. Kostolany framed his czarist-bond purchase as an imaginative thesis, not entertainment.

25. “Immer warnte ich auch davor, es mir gleichzutun.” — 1991 HP-Magazin reprint of a Capital column, 1991. The adjacent warning is why the position story should not be converted into generic distressed-debt advice.

Identity, freedom, and the public persona

26. “Die USA, das waren meine schönsten Jahre.” — WELT profile with direct quotations, 1996. America was central to his wartime survival and market education, though not ultimately his home.

27. “Ich war schon zu alt dafür.” — WELT profile with direct quotations, 1996. He used age to explain why he did not remain in the United States after the war.

28. “In die USA muß man als ganz junger Mensch gehen.” — WELT profile with direct quotations, 1996. The claim is autobiographical judgment, not an investing rule.

29. “Ich bin mir nicht sicher.” — WELT excerpt from the Gross–Kostolany conversation, underlying conversation 1996, excerpt 1999. Asked whether anything continues after death, he answered with uncertainty rather than performance.

30. “Unbedingter Menschenfreund.” — WELT excerpt from the Gross–Kostolany conversation, underlying conversation 1996, excerpt 1999. This was how he wished to be remembered; it is an edited joint interview product, not market philosophy.

31. “Abscheu und Ekel.” — WELT contemporaneous obituary/profile, 1999. The reporter says this was his answer when asked about computers; it preserves persona, not a general finding about quantitative methods.

32. “Schenken Sie mir ein Klavier.” — WELT contemporaneous obituary/profile, 1999. A piano, requested after helping a friend with a trade, captures how he valued music beyond money.

33. “Ich bin ein Romantiker.” — WELT contemporaneous obituary/profile, 1999. The self-description complicates the stereotype of a purely acquisitive speculator.

34. “Denken Sie mal über Aluminiumaktien nach.” — WELT contemporaneous memorial, 1999. This was an advertising line reported after his death, not a documented research recommendation.

35. “Spielhölle mit gezinkten Karten.” — WELT contemporaneous memorial, 1999. The reported phrase targeted the Neuer Markt and shows the severity of his late-cycle rhetoric.

Annotated index of primary and near-primary materials

The surviving public corpus is strongest in books, bylined columns, and interviews. It is weak in manager-style letters and archival transcripts. The labels below distinguish text by Kostolany, edited oral material, authorized reprints, and institutional records that establish an appearance without preserving his words.

Early writings and books, 1960–1986

• 1960/1961 — BnF record for Si la Bourse m’était contée and German catalog record. These establish Françoise Roussel’s collaboration and Margaret Carroux’s German translation; French and German formulations are not interchangeable originals.
• 1961-10-13 — “Der Fiskus als Spekulations-Partner”. A genuine bylined analysis of distressed sovereign bonds, tax, and the relative analyzability of obligations.
• 1961-10-20 — “Das tragische Ende des Herrn Ivar Kreuger”. A first-person market-history narrative that identifies his bearish Kreuger position without supplying a ledger.
• 1972 — Geld, das große Abenteuer, authorized preview. The strongest accessible early-book sample for his definition of knowledge, information, and speculation as synthesis.
• 1980-01-25 — “Das reine Spielkasino”. An edited direct Q&A on the gold boom; the open web version exposes only the beginning, so the chapter quotes only that verified answer.
• 1982 — Kostolanys Wunderland von Geld und Börse, authorized sample. The current publisher says the underlying 1982 text was not modernized; it anchors exact wording while the citation retains both work and access-edition dates.
• 1986-10-08 — Karlsruhe public-lecture record. Confirms a lecture and Börsenseminar signing, but no transcript or audio was located.

Columns and interviews, 1991–1998

• 1991 — HP-Magazin archival scan. A contemporaneous reprint of one Capital column on czarist bonds; it is not a complete Capital archive.
• 1994-05-25 — ZDF “Zeugen des Jahrhunderts” series archive. Establishes the institutional series that carried the Johannes Gross/Kostolany conversation; no episode transcript was recovered.
• 1995-07-20 — “Die Zocker haben verloren”. A contemporaneous report with direct quotations on positioning, persistent gold overvaluation, and Japan; reporter selection limits it relative to a transcript.
• 1996 — “Der Traum vom mühelosen Reichtum”. A profile preserving first-person recollections of America, age, displacement, and the purpose of money.
• 1996 — Weisheit eines Spekulanten bibliographic record and WELT excerpt. An edited conversation with Johannes Gross, not a sole-authored transcript; the excerpt concerns mortality and self-conception.
• 1996-12 — DER AKTIONÄR interview facsimile. A later reproduction of the direct Q&A on liquidity, Deutsche Telekom, forecasting, and market reversibility.
• 1997-01-02 — WELT/dpa euro report. Preserves attributed statements by Kostolany while separating Gottfried Heller’s neighboring comments.
• 1997-08-22 — Berliner Zeitung interview. A direct late-life Q&A on forecast limits, partial profit-taking, 1929, reversals, and long horizons.
• 1997-10-29 — WELT direct interview. His clearest compact interview on holding period, demand, inexperienced buyers, and refusal to advise a generic small investor.
• 1998-06-18 — BR Alpha Forum transcript. The best accessible long oral primary source: losses, debt, crowd psychology, four Gs, bonds, Chrysler, derivatives, computers, and conditional sleeping-pill advice.
• 1998-09-04 — NDR Talk archive. Records the continuing program archive, but no official transcript or surviving captions for his appearance were located.

Posthumous publication and contemporaneous reception, 1999–2000

• 1999-09-22 — “Das Leben — eine Spekulation”. A contemporaneous obituary/profile that preserves short attributed remarks; useful for voice and reception, weaker than a transcript.
• 1999-09-22 — “Das Vermächtnis des André Kostolany”. Reports his advertisement line and Neuer-Markt description; it also repeats aphorisms whose origin remains unresolved.
• 2000-02-14 to 2000-02-19 — authorized final-book serialization: participant types, the long view, economy and market, liquidity and psychology, holders and cycle, and information discipline. These are six installments of one posthumous book manuscript, not six independent works or live interviews.

What was not found, and what was excluded

A licensed Hungarian-edition foreword reports 414 Capital appearances from March 1965 to October 1999, broadly consistent with Kostolany’s 1998 statement that he had written the column for 33 years. No public issue-by-issue ledger or complete Capital text corpus was recovered, so the count remains a licensed-editor claim and the index includes only the located 1991 reprint (licensed foreword; BR, 1998). A bounded search of the Kalliope portal and institutional catalogs found no public personal-papers archive, recurring shareholder or fund letters, complete speech archive, or Kostolany podcast corpus. He gave many talks and broadcasts; absence from this public index is not proof that recordings or papers never existed.

Several celebrated lines were deliberately excluded. Kostolany told BR that the “more fools than papers” maxim came from an older Paris trader; the cannons/harps saying is older and Rothschild-attributed; and no accessible contemporary source anchored the dog-and-master, streetcar, or “anything is possible—even the opposite” formulations. The viral sleeping-pill slogan is especially misleading: in BR’s direct account the money must not be needed, the purchase is a portfolio of international securities, and the sleep is roughly five or six years—not an unconditional promise of riches.

The copyright position reinforces this conservative method. Ordinary German protection lasts for life plus 70 years; joint works run from the last surviving joint author, and translations receive their own protection (UrhG §64; §65; §3). Kostolany's works therefore remain protected under the ordinary rule, while collaborative and translated works can require a different calculation. Short quotations here serve analysis; surrounding text is paraphrased, and consecutive fragments remain within the 25-word underlying-work cap without reproducing a substantive passage.

The result is less slogan-heavy than popular quote lists, but more revealing. Kostolany’s durable voice is not “always buy.” It is a mixture of crowd psychology, liquidity, patience, imagination, confessed error, theatrical prediction, and an insistence that personal circumstances determine whether a person can survive the wait.

As of 2026-07-18. Kostolany is best read as a financial storyteller, public educator, columnist, and personal speculator—not as the author of an audited investment record. His books preserve a distinctive vocabulary for liquidity, crowd psychology, patience, and contrarian action, but they are repetitive, anecdotal, and sometimes editorially complicated.

Bibliographic verdict: count underlying works, not ISBNs

There is no defensible one-number bibliography. In a 1998 interview Kostolany said he had published twelve books; a contemporary notice called the posthumous Die Kunst, über Geld nachzudenken his thirteenth. Library searches return far more records because they count translations, reissues, audio editions, anthologies, and compilations. Exact sales totals are omitted because no royalty statement or audited publisher ledger was located (BR, 1998; WELT, 2000).

Four controls prevent false duplication:

• The 1961 German Das ist die Börse is the German version of the 1960 French Si la Bourse m’était contée, produced with Françoise Roussel and translated by Margaret Carroux; it is not a second original work (BnF; DDB).
• The 1973 L’Aventure de l’argent is Françoise Kostolany’s French translation and adaptation of Geld, das große Abenteuer, not a separate book (BnF).
• Kostolanys beste Geldgeschichten and Kostolanys beste Tips für Geldanleger were selected and compiled by Hubert Spegel; Der große Kostolany bundles three earlier books. These are editorial products, not new solo manuscripts (DNB-derived catalog; Ullstein).
• Weisheit eines Spekulanten is a conversation with Johannes Gross, while Die Kunst, über Geld nachzudenken appeared about five months after Kostolany died. Gross’s role is explicit; the final book’s manuscript-to-publication editing is not. Neither fact licenses a ghostwriting claim (EconBiz; Ullstein).

The ranking below therefore favors underlying works whose text, table of contents, and provenance can be checked. “Best sections” means the most useful places to begin, not an endorsement of every claim.

1. Die Kunst, über Geld nachzudenken (2000, posthumous)

Central thesis

Successful speculation is an art of independent judgment about liquidity, expectations, and mass psychology, financed by patience. It is not a mechanical science. This is the clearest late synthesis, but also the most editorially sensitive: it was published posthumously and much of its content restates earlier books (Ullstein).

Ten key ideas, paraphrased

1. Money is most valuable when it purchases independence rather than status (WELT, 14 February 2000).
2. Players, investors, and speculators use different horizons; confusing them produces the wrong expectations and risk budget (WELT, 14 February 2000).
3. Long-run market direction is related to economic development, but the market can wander far from the economy in the interim (WELT, 16 February 2000).
4. Medium-run prices are driven especially by available money and crowd psychology (WELT, 17 February 2000).
5. News has no fixed sign. Price response depends on prior expectations, positioning, and whether the event was already discounted (WELT, 19 February 2000).
6. Interest rates influence both liquidity and the relative appeal of bonds and equities (WELT, 17 February 2000).
7. Patient, solvent holders can survive volatility; leveraged or late buyers may become forced sellers even when their eventual thesis is right (WELT, 18 February 2000).
8. Thought, capital, patience, and luck are jointly necessary. Analysis without financing and time can still fail (WELT, 18 February 2000).
9. Bull and bear markets tend to move through correction, participation, and exaggeration phases, suggesting a contrarian cycle rather than a forecast by calendar (WELT, 18 February 2000).
10. Tips, gurus, analysts, and alleged inside information often reflect the distributor’s incentives more than the recipient’s interests (WELT, 19 February 2000).

Best sections

Start with “Was die Kurse bewegt,” the long-, medium-, and short-term influence chapters, “Die Psychologie der Massen,” “Das Ei des Kostolany,” “Im Informationsdschungel,” and “Stockpicking.” The closing commandments are memorable, but the analytical chapters supply the conditions that slogans normally omit (DNB table of contents). The most useful authorized newspaper sequence covers participant types, the economy-market gap, liquidity and psychology, strong versus weak holders, cycle phases, and information discipline. The six installments are one serialized book, not six independent essays (WELT, 16 February 2000; WELT, 17 February 2000; WELT, 19 February 2000).

2. Geld, das große Abenteuer (1972)

Central thesis

The instruments of finance change, but speculation’s recurring structure—liquidity, politics, expectations, leverage, promotion, boom, and crash—does not. Part memoir, part market history, and part operating philosophy, this is the strongest early single-volume account (DDB; authorized digital-edition preview). Because the public preview ends early, the later-chapter ideas below pair the institutional contents with accessible later primary statements; that establishes a conservative thematic reading guide, not page-level attribution to unseen text.

Ten key ideas, paraphrased

1. Speculation is reasoned risk-taking under uncertainty, not merely wagering on rapid price movement (authorized preview).
2. Stocks, bonds, convertibles, commodities, and distressed securities have different catalysts, clocks, and failure modes (book contents; BR, 1998).
3. Time can be a greater source of profit than geographic arbitrage, but only for a holder able to wait (book contents; BR, 1998).
4. A boom cannot be understood apart from the leverage, narratives, and eventual crash it creates (book contents; WELT, 18 February 2000).
5. Financial history is a catalogue of recurring behavior, not a machine for precise forecasts (book contents; BR, 1998).
6. Distressed bonds and nearly failed companies can offer asymmetric upside, while imposing severe timing, solvency, and political risk (book contents; BR, 1998).
7. Market tendency can be usefully simplified as the interaction of money supply and psychology (book contents; WELT, 17 February 2000).
8. The economy and the securities market can diverge because each discounts a different horizon (book contents; WELT, 16 February 2000).
9. Monetary, interest-rate, fiscal, and political decisions affect markets through both cash availability and expectations (book contents; WELT, 17 February 2000).
10. Funds, conglomerates, tips, charts, computers, and hedges can inform analysis, but can also disguise promotion or false precision (book contents; WELT, 19 February 2000).

Best chapters

Read “Information und Spekulation,” “Die Geschichte der Börse in der Nußschale,” “Investmentfonds und Mischkonzerne,” “Börsenmathematik: Geldmenge, Psychologie und Börsentendenz,” “Politik und Börse,” “Informationen, Tips und Rezepte,” and “Größe und Elend der Spekulanten.” Together they show both the framework and its anecdotal limits (original-edition contents).

3. Kostolany’s Wunderland von Geld und Börse (1982)

Central thesis

A historical and autobiographical tour of markets argues that personal independence and judgment matter more than forecasting machinery. Monetary, political, and behavioral mechanisms recur, but every asset and regime imposes different constraints. The current publisher explicitly preserves the 1982 text and warns that historically dated passages were not modernized (authorized sample).

Ten key ideas, paraphrased

1. Markets have a capricious internal logic that differs from common-sense descriptions of the current economy (authorized sample).
2. Interest rates and government decisions can dominate near-term company fundamentals (authorized sample).
3. Inflation matters partly through the policy response it provokes, not as an automatic buy or sell signal (authorized contents; WELT, 17 February 2000).
4. Cycles contain recognizable psychological phases, though their duration is unknown (BR, 1998).
5. Contrarianism means adjusting across those phases, not buying every fall indiscriminately (authorized contents; WELT, 18 February 2000).
6. The serious speculator is a strategist with time, not a day trader seeking constant action (WELT, 14 February 2000).
7. First-hand information, charts, and computers remain inputs; none substitutes for interpretation (authorized contents; WELT, 19 February 2000).
8. Every boom plants conditions for reversal, so stories of success should be paired with the subsequent crash (authorized sample).
9. Historical episodes—from John Law to 1929—are laboratories for crowd behavior rather than templates with fixed dates (authorized sample; authorized contents).
10. Capital preservation may involve equities, bonds, property, collectibles, and cash, but each brings distinct liquidity, valuation, and custody problems (authorized contents).

Best sections

The most useful sequence is “Die kapriziöse Logik der Börse,” “Der Einfluss von Zinssatz und Regierungsentscheidungen,” “Phasen zyklischer Bewegung,” “Der Weg zum Erfolg: antizyklisches Handeln,” “Der Spekulant: Stratege auf lange Sicht,” “Wie wertvoll sind Informationen aus erster Hand?,” and “Boom und Krach.” Finish with “Zehn Gebote—Zehn Verbote,” but interpret the rules through the preceding conditions (authorized contents).

4. Kostolanys Börsenseminar (1986)

Central thesis

This question-and-answer primer teaches readers to separate time horizons, instruments, liquidity, psychology, and temperament before committing capital. It is the most accessible operating manual in the canon, although it supplies principles rather than a reproducible quantitative system (EconBiz). The verified contents establish its question clusters; the later full-text excerpts and interview cited below confirm the paraphrased answers rather than turning the contents page into evidence of unwritten detail.

Ten key ideas, paraphrased

1. Exchanges allocate capital to enterprise as well as provide a venue for speculation (book contents; WELT, 16 February 2000).
2. Short-, medium-, and long-term price factors must be analyzed separately (book contents; WELT, 16 February 2000).
3. Faster information technology does not necessarily make markets easier to understand (book contents; BR, 1998).
4. Speculation requires a constructed thesis; gaming seeks movement without one (book contents; BR, 1998).
5. Nonconformity requires both conviction and the financial ability to wait (book contents; WELT, 18 February 2000).
6. The distribution of securities between impatient and resilient holders helps determine technical condition (book contents; WELT, 18 February 2000).
7. Credit-financed purchases can convert a temporary price error into permanent forced liquidation (book contents; BR, 1998).
8. Strategy should govern tactics; activity is not a substitute for a coherent horizon (book contents; BR, 1998).
9. Experts, insiders, and professional managers should not be copied without understanding their incentives and constraints (book contents; WELT, 19 February 2000).
10. Company reports are necessary evidence, but they do not resolve valuation, timing, or psychology (book contents; WELT, 19 February 2000).

Best sections

Use the question clusters on time horizons; player versus speculator; nonconformity; liquidity and holder quality; credit and strategy; experts and insiders; and then the instrument and interest-rate sections. The verified contents place these clusters roughly across pages 43–100 before moving into individual assets (DNB table of contents).

5. Kostolanys Börsenpsychologie (1990)

Central thesis

Short- and medium-term market behavior is largely a social process shaped by liquidity, leverage, imitation, narratives, and the emotional condition of holders. A DNB-derived record dates the work to 1990; the recommended lecture titles below are verified against a 1992 paperback contents record (DNB-derived record; DNB table of contents). As with Börsenseminar, the contents establish the book's themes and the cited later primary texts establish the paraphrased answers; the list does not pretend to quote an unavailable full text.

Ten key ideas, paraphrased

1. Market psychology can overwhelm conventional economic logic over useful investment horizons (book contents; WELT, 18 February 2000).
2. The public often enters after rising prices validate a story and exits after falling prices destroy confidence (book contents; WELT, 18 February 2000).
3. Cash reserves preserve agency when crowds panic (book contents; BR, 1998).
4. Debt destroys patience by converting volatility into a funding deadline (book contents; BR, 1998).
5. Crashes are concentrated demonstrations of imitation, leverage, and narrative reversal (book contents; WELT, 18 February 2000).
6. Computers can process inputs but cannot supply imagination or judgment about human response (book contents; BR, 1998).
7. Gurus and fashionable labels turn uncertainty into false confidence (book contents; WELT, 19 February 2000).
8. Political news matters through interpretation and prior positioning, not mechanically (book contents; WELT, 19 February 2000).
9. One lecture considers how national habits affect market participation; the historically situated generalizations should not be universalized (book contents).
10. The speculator is only one participant in a larger market ecology that includes brokers, players, entrepreneurs, promoters, and investors (book contents; WELT, 14 February 2000).

Best lectures

Begin with “Die Börse besteht zu 90 Prozent aus Psychologie,” then read the lectures on money’s fascination, uninformed crowds, the great crash, prophets and gurus, the exchange’s relation to the wider world, and “Mein Börsenzoo.” These chapters expose the behavioral system more clearly than isolated aphorisms do (DNB table of contents).

6. Weisheit eines Spekulanten (1996, with Johannes Gross)

Central thesis

Gross uses Kostolany’s life as an oral history of twentieth-century markets: experience, regime change, error, luck, and independence matter more than credentials or a single formula. It is best treated as structured testimony, not as an unmediated solo treatise or an independent biography (Ullstein). No reliable public contents or full text was found, so the themes below are a bounded guide based on the publisher description and adjacent 1998 interview, not invented chapter-level attribution.

Ten key ideas, paraphrased

1. Market knowledge accumulates through cycles and mistakes, not credentials alone (BR, 1998).
2. Financial independence is a more coherent goal than maximizing nominal wealth (BR, 1998).
3. War, inflation, exile, reconstruction, and monetary reform repeatedly alter the opportunity set (BR, 1998).
4. Speculation is probabilistic; luck cannot be eliminated from outcomes (BR, 1998).
5. Personal losses and near-failures are part of learning, not evidence of an infallible record (BR, 1998).
6. Market history reveals recurring behavior without providing precise timing (BR, 1998).
7. Cultural breadth and observation of people can improve interpretation of crowds (BR, 1998).
8. Later-life advice moved closer to diversified, long-horizon investing for ordinary savers (BR, 1998).
9. Vivid trade stories are memoir evidence unless matched to account records (BR, 1998).
10. Gross’s questions and editorial framing form part of the work and should remain in the attribution (Ullstein).

No reliable public table of contents was located, so naming “best chapters” would manufacture precision. Read it alongside the full 1998 BR interview, which provides a searchable late-life comparison and makes disagreements or repeated anecdotes easier to spot (BR, 1998).

The remaining authored corpus

Catalog titles and metadata show that Kostolany wrote on broader political economy before adopting his mature German market persona: Suez, le roman d’une entreprise (1939) concerns the Suez enterprise; La Paix du dollar (1957) carries a Robert Schuman preface; and La Grande confrontation (1959) is a 44–45-page postwar political pamphlet (Tunisian National Library, Suez; BnF; Tunisian National Library, La Grande confrontation).

Si la Bourse m’était contée (1960) is the first major market narrative, moving across confession, exchange history, market characters, and cautionary stories; read the underlying French or German work once, with the collaborator and translator credited (German-edition contents). Kostolany’s Notizbuch (1983; later retitled Mehr als Geld und Gier) arranges collected notes by theme, but the current publisher does not identify the original organizer. Catalog metadata identifies … und was macht der Dollar? (1987) as a currency-speculation book and Kostolanys Bilanz der Zukunft (1995) as a past/present/future survey with a Johannes Gross foreword. Publicly verified contents were insufficient to recommend chapter-level reading for those last two without guesswork (FinanzBuch Verlag; DNB-derived record; EconBiz).

His short-form corpus matters because it captures judgments before memoir smoothing. Two genuine bylined 1961 DIE ZEIT articles show a compact distressed-sovereign checklist and a first-person account of the Kreuger collapse (DIE ZEIT, 13 October 1961; DIE ZEIT, 20 October 1961). An archival 1991 reprint of a Capital column records a Russian-bond position contemporaneously, including a warning not to imitate it (HP-Magazin, 1991). Publisher/editor material reports 414 Capital appearances from March 1965 to October 1999, but no complete issue-by-issue index was found; treat that exact count as publisher provenance, not an audited finding (licensed edition foreword). The 1980 gold-bubble article is an edited interview, and the 1998 BR transcript is oral history, not authored prose; both remain valuable primary material when labeled correctly (DIE ZEIT, 1980).

Best works about Kostolany, ranked

1. Péter Fodor, “Tőzsde és storytelling: André Kostolany történetei a pénzről” (2024). The strongest independent scholarship located. This short Hungarian study analyzes how textbook explanation shifted toward anecdote, how stories migrated across books and editions, and how the Kostolany name became an authority-producing brand. It is literary and cultural analysis, not a biography or performance audit (full volume).
2. DIE ZEIT, “Amüsante Plaudereien” (1983). The best contemporaneous adverse review asks whether books and lectures were more lucrative than speculation. Its skepticism is brief but important because no audited personal return series has surfaced (review).
3. Patrick Welter, Tagesspiegel review of Die Kunst (2000). The best contemporary check on posthumous canonization: Welter credits psychological calm and historical charm while criticizing repetition, generalities, and self-regard (review).
4. Rolf Morrien and Heinz Vinkelau, Alles, was Sie über André Kostolany wissen müssen (2020). The only recent dedicated book-length biography found. It is useful for chronology and orientation, but the accessible portion relies heavily on Kostolany’s memoirs and carries a laudatory foreword by friend and business partner Gottfried Heller (publisher excerpt).
5. The 1998 BR Alpha Forum interview. Not independent, but the best extended first-person record for comparing life stories, philosophy, and claimed trades across the books. It contains recollection rather than audited account evidence (transcript).
6. Contemporaneous obituary/profile set. WELT and Tagesspiegel preserve public reception and biographical leads, but repeat memoir anecdotes and disagree on some dates. Use them to triangulate, not to certify wealth or performance (WELT, 1999; Tagesspiegel, 1999).

Recommended reading path

For one book, choose Geld, das große Abenteuer: it gives history, instruments, psychology, and self-portrait before the late canon hardened. For an operational sequence, read Börsenseminar, then Börsenpsychologie, then the cycle and information chapters of Die Kunst. Read Wunderland next for the broader historical voice and its dated assumptions. Use Weisheit and the BR interview to test how Kostolany retold his career. Finally, read Fodor and the two critical reviews to examine repetition, brand formation, and retrospective authority.

The practical rule is to read arguments, not aphorisms. Track the condition attached to each maxim: unleveraged capital, diversification, time, liquidity, and the possibility that the market remains irrational longer than the holder remains solvent. Never convert a colorful anecdote into verified P&L.

Evidence, legal, and copyright limits

No personal trading ledger, audited return series, estate accounting, attributable fund record, complete Capital index, or public personal-papers archive was located. Books and interviews establish what Kostolany said and how his framework evolved; they do not validate his wealth, hit rate, or trade arithmetic. Bounded multilingual searches found no reliable personal criminal, civil, or regulatory proceeding, but that is not a clean-record certification.

Kostolany died in 1999. Straightforward sole-authored works ordinarily receive a life-plus-70-year term in Germany, while joint works can have a different term (German Copyright Act §64; §65). This chapter therefore paraphrases ideas, reproduces no book passage, and treats tables of contents only as navigation evidence.

As of 2026-07-18. Kostolany died in 1999, so these are historical models reconstructed from his books, bylined excerpts, and interviews—not current FIDUKA policy or an audited portfolio system. A close associate explicitly described him as offering behavioral rules rather than a formal system (Morrien and Vinkelau publisher excerpt, 2020).

How to read the framework

Kostolany’s durable contribution is a vocabulary for asking who owns the securities, what financing permits, what the crowd expects, and how much time the thesis requires. It is not a valuation model, risk engine, or performance record. No public source reviewed here supplies a position-sizing formula, portfolio leverage cap, correlation budget, drawdown limit, stop-loss policy, review cadence, or complete trade scorecard. His memorable rules become dangerous when detached from their conditions.

The classifications below are deliberate:

• Direct model: Kostolany named or clearly stated the framework.
• Adapted rule: the Canon converts his metaphor into a testable question without claiming his exact wording.
• Canon safeguard: a modern control added because his public framework leaves a material gap.

The model stack

1. Choose the role before choosing the security

Kostolany separated the short-term player, the long-term investor, and the speculator with an intellectual construction. The player seeks small movements; the investor holds a broad, high-quality basket across decades; the speculator takes a view on uncertain future change. He also admitted that a failed speculation can be renamed an “investment,” calling that self-deception (WELT, 14 February 2000; WELT, 15 February 2000).

The adapted rule is simple: write down the role, horizon, catalyst, and permitted response before entry. A speculator may exit when the expected event, liquidity, or positioning changes. An investor may tolerate price noise if business quality and diversification remain intact. A player should be recognized as a wager rather than given an investor’s risk budget after it falls. The empirical warning against confusing activity with skill is strong: in Barber and Odean’s household sample, the most active investors substantially underperformed the market, although that study does not validate Kostolany’s own speculative process (Barber and Odean, 2000).

2. Separate the three clocks

The dog-and-master metaphor says the economy and the market can travel in the same long-run direction while the market runs ahead, falls behind, and reverses repeatedly. Kostolany’s late synthesis separated long-term economic development from medium-term money and psychology, with short-term news filtered through current positioning (WELT, 16 February 2000).

Operationally, a thesis should have three lines:

1. Long clock: productive capacity, earnings power, peace, institutional survival, or secular decline.
2. Medium clock: rates, credit, monetary liquidity, new security issuance, and crowd appetite.
3. Short clock: positioning, forced flows, expectations, and the immediate catalyst.

The metaphor does not say the dog must return soon, that the master is walking uphill, or that every security survives the walk. Bessembinder’s U.S. evidence shows why an economy-level metaphor cannot justify passive confidence in an arbitrary stock: long-run net wealth creation was concentrated in a small minority of companies (Bessembinder, 2020). The model cannot provide an entry price, path, or maximum divergence. Fodor’s literary analysis makes a related criticism: the vivid analogy raises unresolved questions about direction, distance, and reversal even as its memorability gives it authority (Fodor, 2024).

3. Diagnose money and psychology separately

Kostolany’s direct medium-term equation is qualitative: money plus psychology determines tendency. It was already named in the 1972 book’s contents, not invented for the posthumous final volume (DNB contents, 1972). When both are favorable, prices can rise; when both are adverse, they can fall; when they conflict, the market can remain indecisive. “Money” includes rates, credit, and capital available for securities; psychology is the willingness to deploy it. He also emphasized new-issue supply and the competition that higher bond yields create for equities (WELT, 17 February 2000).

A usable version scores each factor only as a hypothesis, not a number:

• What changed in policy rates, long yields, credit availability, margin cost, and net issuance?
• Are investors eager, indifferent, or fearful, and what observable flows or positioning support that judgment?
• Is a liquidity change already anticipated?
• What evidence would reverse each assessment?

The safeguard matters because the equation has no published weights or thresholds. Kostolany even asserted that prices would follow a marked rate change within twelve months; that is a direct historical claim, not a validated universal lag. Treat the framework as a scenario map, never an automatic trade signal.

4. Ask whose hands hold the paper

For Kostolany, “technical condition” did not mean charts. It meant ownership. Patient, solvent holders with thought, money, patience, and luck were the strong hands; late, leveraged, or emotionally pressured holders were shaky. In his model, bad news has limited effect when strong hands dominate, whereas even modest disappointment can cause a debacle when shaky holders are crowded in. The distribution also maps to overbought and oversold conditions (WELT, 18 February 2000).

The modern translation is a funding-and-positioning audit: margin debt, financing expiry, concentrated ownership, fund redemptions, dealer liquidity, short interest, crowded options exposure, and the likely marginal buyer. Brunnermeier and Pedersen provide a modern mechanism—market liquidity and traders’ funding liquidity can reinforce one another—but not a test of Kostolany’s labels (Brunnermeier and Pedersen, 2009). Retail investors cannot observe every holder or their collateral. The model should therefore produce probabilities and stress scenarios, not claims that unnamed “strong hands” must win.

5. Use the egg as a cycle hypothesis, not a clock

The Kostolany egg assigns both bull and bear movements three phases: correction, participation or accompaniment, and exaggeration. The framework was present in Wunderland Börse by 1982 (DNB contents). At a downward extreme, strong hands accumulate amid terrible news; a middle phase aligns price with improving events; an upward extreme transfers paper to euphoric late buyers. The sequence then reverses. Kostolany illustrated it retrospectively with the 1982–1987 bull market and October 1987 crash (WELT, 18 February 2000).

To prevent hindsight, label a phase prospectively with evidence: valuation range, issuance, fund flows, leverage, breadth, public participation, and expected-news response. Record a falsifier and a review date. The egg provides no duration, amplitude, or unique identification rule; the same observations can fit more than one phase. It is a narrative state machine, not a calibrated oscillator.

6. Trade the expectation gap, not the headline

The fait accompli model distinguishes an event from what prices already imply. Good results can produce selling if buyers accumulated beforehand; bad results can produce a rally if the feared outcome is less severe. Kostolany told readers to look between the lines and anticipate the public’s reaction, while distrusting tips and widely distributed “inside” information (WELT, 19 February 2000).

The operational template is: consensus outcome, price-implied outcome, plausible range, holders’ likely action, and what incremental buyer or seller remains after release. The failure test is symmetry: if every price response is explained afterward as discounted, the model is unfalsifiable. Write the expected reaction before the event.

7. Finance patience: the four Gs and 2×2=5−1

Kostolany’s four requirements were thought, money, patience, and luck; he said he adapted an older four-G maxim by substituting Gedanken (thought) for Genie. His 2×2=5−1 metaphor says a thesis may eventually reach the expected result by a painful, non-linear route. Money is what finances patience; luck is an explicit admission that analysis is insufficient. In the same interview he said advice must depend on age, profession, social and financial circumstances, and that money needed soon cannot support years of waiting (BR Alpha Forum, 1998).

This is a survival model, not a promise that every loss recovers. Research on limits to arbitrage supports the narrower point that delegated capital and interim losses can force an otherwise informed investor out before convergence; it does not prove a given thesis will converge (Shleifer and Vishny, 1997). Before entry, specify cash needs, maximum tolerable loss, financing and expiry, thesis horizon, and a fundamental kill criterion. “I can wait” is invalid when debt forces sale or when the security can permanently impair. Patience becomes attachment when the thesis or opportunity set changes.

8. Look beyond the bonnet—but assign odds

Kostolany’s driving-instructor metaphor urged the speculator to look far down the road (WELT, 15 February 2000). His German external-bond, Chrysler, and Russian imperial-bond stories all follow the same architecture: hated paper, a long normalization thesis, and the ability to wait. The stories are powerful demonstrations of second-order thinking, but the spectacular personal return figures are recollections rather than account records.

The Young-bond settlement mechanics have official historical support, while the ownership, lots, and profit remain self-reported (German Finance Ministry, 2003). Chrysler’s near-bankruptcy and restructuring are independently documented, not Kostolany’s entry or P&L (GAO, 1984). A contemporaneous column reprint supports his ownership of Russian bonds, but the official individual compensation process extended beyond his death (HP-Magazin, 1991; Légifrance, 1998).

The Canon safeguard is a base-rate tree: probability of survival, catalyst, timing distribution, recovery value, funding cost, and failure recovery. Vision without those branches is a story.

9. Put imponderables into the position, not just the prose

In Geld, das große Abenteuer, Kostolany used “imponderables” for policy, weather, war, smuggling, and other surprises that defeat apparently exact statistics. His corn-bacon spread lost on both legs after policy changed supply and demand; a silver paper fortune vanished after another policy reversal; a refrigerated-egg short was hurt by an unusually long winter (authorized digital-edition preview, 1972/2022).

The concept becomes useful only when it changes construction: smaller size, limited loss, less leverage, multiple independent catalysts, liquidity reserve, and explicit regime-break scenarios. It does not excuse inaccurate chronology—the memoir’s corn-policy and silver dates require correction from official records (USDA, 1950; U.S. Silver Purchase Act, 1934).

10. Treat information as judgment under incentives

Kostolany said he gathered information widely but distrusted bankers, brokers, analysts, economists, tips, and promotional research. His positive rule was not ignorance: read broadly, find what matters between the lines, distinguish present facts from future implications, and think independently (WELT, 19 February 2000).

Modern transfer requires an incentive ledger: who produced the claim, who benefits, what is primary evidence, what is consensus, and what would disconfirm it. His contempt for formal analysis should not justify skipping filings, accounting, valuation, or data. Judgment should integrate those inputs, not replace them with charisma.

11. Restore the conditions to the sleeping-pill rule

The direct 1998 version involved a basket of international securities, years of waiting, and money not needed soon—not buying any stock and becoming rich. His late taxonomy separately favored a broad palette of first-class shares across industries and countries for ordinary investors. Gottfried Heller, a conflicted but close associate, likewise said the popular slogan had been truncated and was chiefly a guard against panic selling (BR Alpha Forum, 1998; Heller correction, 2020).

Even the conditional version does not remove drawdown or constituent risk. One of Kostolany’s own reported prohibitions rejects “sleeping” on a holding merely to avoid deciding; patience was not permission to neglect a broken thesis (HP-Magazin, 1983). Mittnik’s modern critique shows the psychological difficulty of holding through deep index losses and the changing risk of an unrebalanced portfolio (Scalable Capital, 2017). The transferable rule is low-turnover diversified ownership with an emergency reserve and periodic thesis/rebalancing review—not literal sleep.

Kostolany’s reported late-life ownership of roughly 450–500 securities is biographical evidence, not a recommended count, weighting method, or assurance that economic exposures were diversified (Berliner Zeitung, 1997). Broad ownership without security review can still embed sector, country, currency, or factor concentration.

12. Turn commandments into review controls

Kostolany ended Wunderland Börse with commandments and prohibitions, but the public evidence reviewed here does not establish a complete institutional rulebook (DNB contents). A near-contemporary review summarizes several practical instructions: decide sequentially whether to buy, then select the country, industry, and security; preserve adequate capital; expect delay and surprise; periodically ask whether the holding would still be bought today; sell when a new constellation invalidates the original idea; demand imaginable material upside; account for imponderables; and remain humble after success (HP-Magazin, 1983). These are direct reported rules, but the review is not a substitute for checking a specific book edition.

The same source reports prohibitions against revenge trading, anchoring on an old price, taking a small profit merely for emotional relief, watching every fluctuation, presuming the counterparty necessarily knows more, and letting political sympathies determine a position. The operational reconstruction is therefore a scheduled thesis renewal: compare the current facts with the original causal chain, ask whether the security still earns its place against alternatives, and exit when the reason—not merely the price—has materially changed. Kostolany supplied no review frequency, written template, valuation threshold, or opportunity-cost hurdle; those remain Canon safeguards.

Reconstructed decision checklist

This is a Canon reconstruction, not a discovered Kostolany worksheet.

1. Name the role. Investor, event-driven speculator, or acknowledged wager? Fix the horizon before price moves.
2. Confirm survival capital. Use surplus money; record liquidity needs, expiry, collateral, and the loss that would force sale.
3. Write the long clock. What economic, business, political, or solvency change creates value? What is permanent-impairment risk?
4. Map money. Rates, credit, margin cost, new issuance, competing yields, and likely direction—not a vague “liquidity” label.
5. Map psychology and ownership. Flows, leverage, concentration, public participation, and marginal buyer/seller.
6. Locate expectations. Consensus, price-implied outcome, event range, and prospective reaction.
7. Choose the phase provisionally. Correction, participation, or exaggeration, with observable evidence and a falsifier.
8. Investigate incentives. Prefer filings, official records, and direct testimony; document promoter and adviser conflicts.
9. Stress imponderables. Policy reversal, fraud, weather, war, financing withdrawal, liquidity gap, and thesis delay.
10. Size with added safeguards. Because Kostolany gave no formula, cap loss by explicit downside and correlation rather than confidence or aphorism.
11. Prewrite exits. Thesis invalidation, changed liquidity, euphoric transfer, superior opportunity, or personal funding need.
12. Renew the thesis periodically. Ask whether the holding would still be bought today, whether patience has become attachment, and whether the position was relabeled after loss.

Case and falsifier tests

Failure modes of the model set

1. Hindsight and circular labels. “Exaggeration,” “strong hands,” and “discounted news” are easy to assign after the outcome.
2. No valuation anchor. The frameworks explain path and temperament better than price versus value.
3. No sizing architecture. Imponderables are acknowledged but not converted into a public loss budget.
4. Survivorship storytelling. Vivid wins and general loss admissions survive without a complete ledger. A contemporary review could not determine whether trading or books and lectures produced more success (DIE ZEIT, 1983).
5. Regime ambiguity. Liquidity and psychology can point in opposite directions for longer than the position can survive.
6. Patience versus impairment. Equities, distressed bonds, and expiring claims do not all recover with time.
7. Celebrity compression. Conditional advice mutates into unconditional slogans; Fodor also documents story migration and brand authority.
8. Unreplicable information network. A multilingual market celebrity with decades of contacts is not a normal retail baseline.
9. Role and attribution drift. FIDUKA’s current activity and Heller/team decisions cannot be projected backward as Kostolany’s personal record (FIDUKA history).

Transferability

What an individual investor can replicate

• Separate horizon, liquidity, psychology, and expectations rather than reacting to headlines.
• Use surplus capital, avoid forced timing, diversify ordinary long-term holdings, and precommit against panic.
• Read primary documents, map incentives, keep a prospective decision journal, and record falsifiers.
• Stress policy and regime breaks before trusting a historical relationship.
• Distinguish an investment from a speculation and either from a wager.

What an individual investor cannot safely copy

• Kostolany’s anecdotal confidence, contact network, access to thin historical paper, or claimed ability to wait for decades.
• Unquantified concentration, leverage, shorting, derivatives, distressed sovereign claims, or commodity spreads.
• The spectacular personal return figures without account records, costs, taxes, and a portfolio denominator.
• A literal “sleep” policy without diversification, liquidity reserves, security-quality review, and rebalancing.
• Current FIDUKA products, seminars, or results as if they were his personal implementation.

The best modern use of Kostolany is therefore diagnostic. His models force better questions about financing, ownership, expectations, and crowd behavior. They do not answer how much to buy, what a security is worth, or when the market will turn. Those missing answers must be supplied explicitly before capital is committed.

As of: 2026-07-18T14:06:47Z

Task: T0502 | 062-andre-kostolany | H-synthesis

Note on completeness: this synthesis was selected while T0499 E-own-words and T0501 G-mental-models were still freshly claimed. T0501 landed on main before H closeout and is incorporated here; T0499 remained unavailable. This file should be refreshed if E-own-words later adds materially different primary quote provenance.

Executive Brief

Andre Kostolany belongs in the Canon as a public-markets thinker whose durable contribution is not an audited return series but a portable grammar for speculation under uncertainty. The identity facts are settled enough: BnF records him as Andre Kostolany (1906-1999), born in Hungary, a banker and specialist in stock-market operations, and dead in Paris on 14 September 1999 (BnF, updated 2025). His career is best described as personal speculator, market writer, columnist, lecturer, and Fiduka-associated adviser/mentor, not as a modern disclosed portfolio manager. Fiduka's own history preserves his founding-era role, and the audited 2025 FIDUKA-UNIVERSAL-FONDS I report says the fund was initiated in 1989 by Kostolany and Gottfried Heller, but neither source turns later Fiduka assets or performance into Kostolany's personal record (Fiduka history; Universal Investment annual report, 2025).

The core doctrine is simple enough to remember and subtle enough to misuse. In the posthumous WELT serialization of Die Kunst, uber Geld nachzudenken, Kostolany framed medium-term market trend as the interaction of liquidity and psychology: money supplies market fuel, while crowd mood determines whether it is deployed (WELT, 17 February 2000). In a companion excerpt he emphasized the distribution of securities between resilient holders and pressured holders, making "technical condition" a question of financing, patience, and ownership quality rather than chart pattern alone (WELT, 18 February 2000). His edge, when it existed, was judging when the crowd had overreacted to visible news and underpriced the second-order effect of money, policy, solvency, and future demand for securities (WELT, 19 February 2000).

The completed mental-models work sharpens that doctrine into a stack rather than a slogan: choose whether a position is investment, speculation, or wager; separate the long economic clock from the medium liquidity/psychology clock and the short positioning clock; audit strong versus shaky hands; treat the Kostolany egg as a prospective cycle hypothesis; test the fait accompli expectation gap; finance patience through thought, money, patience, and luck; and convert imponderables into sizing and exit safeguards. The same chapter also confirms the missing machinery: no public sizing formula, leverage cap, valuation template, stop-loss rule, drawdown limit, or formal review cadence was located (WELT, 14 February 2000; WELT, 17 February 2000; BR Alpha Forum, 1998).

That lens explains why his best-known trade stories cluster around distressed paper and normalization. The Young-bond story is the strongest case because a 1998 BR interview gives a first-person entry, adverse move, holding period, and endpoint, while the German Finance Ministry independently confirms the postwar debt-settlement mechanics; still, the official source does not confirm his lots, coupons, proceeds, or position size (BR Alpha Forum, 1998; German Finance Ministry, 2003). Chrysler and Russian imperial bonds are similar: public records support the corporate crisis, split arithmetic, or legal settlement environment, while Kostolany's ownership, sizing, exit, and realized P&L remain self-reported, posthumous, or unreconciled (GAO, 1984; DaimlerChrysler SEC F-4, 1998; Légifrance, 1998; French Senate, 2000).

The adverse record is essential. In BR's 1998 interview, Kostolany recalled losing all his money before the war, incurring enormous debts, and needing colleagues' help to restart; a 1997 Berliner Zeitung interview ties a total-loss account to the 1929 period, while later retellings also describe profitable bearish legs, making the campaign unreconstructable as a clean win or loss (BR Alpha Forum, 1998; Berliner Zeitung, 1997). The 1983 DIE ZEIT review asked the necessary skeptical question: whether speculation or the business of books and lectures was financially more important to him (DIE ZEIT, 1983).

The transferable Kostolany is therefore not a scorecard. He is a set of disciplines: stay solvent, avoid expiring instruments when the thesis needs time, study who owns the security, distinguish news from expectations, buy when forced sellers meet plausible normalization, and treat aphorisms as compressed checklists rather than proof. His legend is colorful; his useful inheritance is colder.

10 Transferable Lessons, Ranked

1. Survival is the first position. Kostolany's strongest lesson comes from the loss record, not the winning anecdotes. A thesis with a long horizon needs surplus cash, no forced selling, and no instrument clock that can expire before reality changes; otherwise patience becomes a slogan. His own prewar ruin/debt testimony and later warnings about retail derivatives make this the gate before any contrarian trade (BR Alpha Forum, 1998; Berliner Zeitung, 1997).

2. Analyze the holders, not only the asset. His resilient-versus-shaky-holder distinction is a practical ownership-map tool: who owns this security, how financed are they, what could force them to sell, and who has cash when they do? That translates cleanly into modern distressed credit, small caps, closed-end funds, crisis equities, and crowded-factor unwinds (WELT, 18 February 2000).

3. Put liquidity and psychology before the headline. Kostolany's "money plus psychology" equation is useful because it explains why good economic data can hurt stocks if it tightens expected money and why bad data can help if it points to easier policy. The transferable move is to ask what the news changes about future flows, financing, and risk appetite, not whether the headline is pleasing (WELT, 17 February 2000; BR Alpha Forum, 1998).

4. Buy normalization only when a plausible mechanism exists. Young bonds, Chrysler, and Russian state paper are not generic "cheap assets." Each required an external change: sovereign debt settlement, corporate rescue and operating recovery, or Franco-Russian claim settlement. Modern investors should name the mechanism, expected path, legal dependencies, and time risk before calling something contrarian (German Finance Ministry, 2003; GAO, 1984; Légifrance, 1998).

5. Never let a vivid story substitute for a ledger. Kostolany's most spectacular multiples remain raw endpoint arithmetic from recollection, memoir, or posthumous publication. The Canon should preserve the stories because they teach pattern recognition, but the investor should keep trade tickets, cash flows, coupons, dividends, taxes, leverage, and sale records separate from narrative (BR Alpha Forum, 1998; WELT, 2000; DIE ZEIT, 1983).

6. Contrarianism is conditional, not automatic. He was at his best when pessimism, forced selling, and a credible future buyer met one another. He was not giving permission to buy every decline or short every mania. The Neuer Markt warning looks sensible after the March 2000 collapse, but the absence of a complete forecast ledger means it should be used as a behavioral warning, not a scored prediction record (WDR, Neuer Markt chronology; Tagesspiegel obituary, 1999).

7. Read public information through expectations, prospectively. His information doctrine warns that headlines, tips, earnings reports, and statistics available to everyone are usually already reflected in the price. The useful question is what the market has not yet digested, what assumption is crowded, and how the next buyer or seller will react when the discounted future arrives. To keep the model falsifiable, write the expected reaction before the event rather than explaining every move afterward (WELT, 19 February 2000).

8. Time horizon must match instrument structure. A distressed bond, cash equity, option, short sale, margin account, or futures spread can express the same macro idea with very different survival properties. Kostolany's commodity and silver recollections show that even economically plausible relationships can fail when policy, weather, or market positioning changes before the trade pays (Kostolany, 1972/2022 preview; U.S. Statutes at Large, 1934).

9. Turn errors into constraints. The best modern use of Kostolany is not to imitate his swagger; it is to invert his failures into process rules. The prewar ruin argues for leverage limits, the corn-bacon and egg stories argue for policy and supply-chain humility, and Heller's Ronny Bonds anecdote argues that patience can become attachment when a better opportunity appears (BR Alpha Forum, 1998; Kostolany, 1972/2022 preview; Heller interview, 2008).

10. For ordinary savers, translate the spirit, not the trades. Late Kostolany often warned against tips, fashion, and overactivity. A nonprofessional can copy the anti-fad discipline, cash reserve, long horizon, and distrust of fashionable products without buying defaulted sovereign paper or running macro shorts (BR Alpha Forum, 1998; WELT, 14 February 2000).

Style Taxonomy Tags

• Contrarian speculation
• Market psychology and crowd behavior
• Liquidity/rates cycle analysis
• Political-economy macro interpretation
• Distressed sovereign debt and old-paper optionality
• Turnaround equities
• Patient optionality with survival constraints
• Personal-account operator
• Public educator, columnist, author, and aphorist
• Three-clocks horizon separation
• Kostolany egg cycle hypothesis
• Strong-hands versus weak-hands holder analysis
• News-versus-expectations reasoning
• Flexible, non-benchmark-bound securities selection
• No audited-performance-record caveat
• Self-reported/anecdotal-trade caveat
• Posthumous/editorial-provenance caveat

Regime Dependence

Closest and Most-Opposite Investors Already in Repo

Closest: Bernard Baruch. Both are personal-account speculators whose evidence problems are inseparable from their appeal: political economy, cash, judgment, public aphorism, and pre-modern record opacity. Baruch is more Washington/industrial-control oriented; Kostolany is more European, literary, and psychology/liquidity centered.

Closest: Gerald Loeb. Both are broker-author-era teachers who turn survival, liquidity, and crowd discipline into public doctrine. Loeb is more tactical, liquid-equity, and loss-cutting oriented; Kostolany is more patient, macro-political, and distressed-paper oriented.

Closest: John Maynard Keynes. Both learned through painful speculative errors and evolved toward patience under uncertainty. Keynes has the cleaner institutional record and valuation-led stock selection; Kostolany has the more anecdotal public-educator record and the stronger crowd-psychology vocabulary.

Useful cousin: John Templeton. Both emphasize buying when pessimism is extreme and waiting for normalization. Templeton is the cleaner global mutual-fund comparison; Kostolany is looser, less auditable, and more theatrical.

Useful modern cousin: David Tepper. Tepper is a modern, institutional analog for crisis assets plus policy/liquidity optionality. The difference is process evidence: Tepper's hedge-fund context is more documented, while Kostolany's trades remain mostly narrative.

Most opposite: Jack Bogle. Bogle institutionalized low-cost beta and anti-speculation for ordinary investors; Kostolany defended discretionary speculation when backed by thought, cash, patience, and luck.

Most opposite: Jim Simons. Simons represents systematic, data-intensive, team-built statistical arbitrage. Kostolany represents literary, discretionary, human-psychology interpretation.

Most opposite: William Eckhardt. Eckhardt formalizes probabilistic rules, futures systems, and volatility-normalized sizing. Kostolany's method is craft-based, aphoristic, and much harder to audit mechanically.

Most opposite analytical object: Philip Fisher. Fisher centers company quality, management, product strength, and scuttlebutt. Kostolany centers money, rates, crowds, political economy, and claim normalization.

Most opposite vehicle model: David Swensen. Swensen is institutional asset allocation, governance, manager selection, and illiquidity budgeting. Kostolany is personal-balance-sheet speculation and public teaching.

Unresolved Questions

• Do account statements, tax files, estate papers, broker tickets, or correspondence survive that could establish annual returns, leverage, drawdowns, position sizes, or peak capital?
• What exactly was Kostolany's formal decision authority at Fiduka, and how did it differ from Gottfried Heller's investment-strategy role and later managers' authority?
• Can the Young-bond, Chrysler, Russian-bond, commodity, silver, and early Paris cases be reconstructed from non-memoir records rather than recalled endpoints?
• How much of his wealth came from trading versus books, columns, lectures, seminars, and licensing of his name?
• What was the exact legal basis for contemporary reports that he became an American citizen?
• What precise role did collaborators, translators, editors, and posthumous publishers play in the later Kostolany canon?
• Did E-own-words, still pending when this H file was closed, later add primary quotations or quote-provenance limits that require this synthesis to be refreshed?

Task A - Profile (T0495)

Annotated source map

1. Bayerischer Rundfunk Alpha Forum interview transcript, 1998 - Primary, long-form interview conducted 18 June 1998. Best source for Kostolany's own account of family, studies, Paris apprenticeship, losses, material independence, seminars, books, and the Young-bond and Chrysler anecdotes. All personal performance figures remain self-reported.
2. Bibliothèque nationale de France authority record - Institutional identity and bibliography authority. Confirms 1906 birth year, exact death date/place, Hungarian association and language, German/French authorship, and Françoise Kostolany's translation/adaptation role.
3. Munzinger biography - Curated biographical reference. Supplies exact birth date, family background, religion, early education, and Adrien Perquel; the accessible record is partial and some early trade claims are framed as reported rather than proven.
4. WELT obituary, “Das Leben - eine Spekulation,” 1999 - Detailed contemporaneous obituary. Useful for family history, 1940 escape route, New York work, U.S.-citizen description, public career, and scale estimates. Several colorful money details derive from later recollections and are not account records.
5. Tagesspiegel obituary, 1999 - Independent contemporaneous portrait emphasizing his public-educator role and general avoidance of concrete tips. Its 1941 flight date conflicts with 1940 in other sources; without primary travel or immigration records, the exact chronology remains unresolved.
6. DIE ZEIT review, “Amüsante Plaudereien,” 1983 - Crucial adverse contemporary source. Explicitly questions whether Kostolany made more money trading or from books and lectures, supporting the no-auditable-record boundary.
7. Kostolany, “Der Fiskus als Spekulations-Partner,” DIE ZEIT, 1961 - Primary authored article. Documents his early public treatment of distressed sovereign bonds and the analytical factors he said mattered; it is philosophy, not proof of performance.
8. DIE ZEIT interview, “Das reine Spielkasino,” 1980 - Direct interview documenting his critique of gold speculation and contemporary market positions. Useful for public philosophy, not a forecast scorecard.
9. Fiduka corporate history - Official but interested corporate source. Places him in New York in 1940-46 and at Fiduka from 1971, credits Heller with investment strategy, and describes Kostolany as accompanying the firm with knowledge and experience.
10. Gottfried Heller chronology - Close-collaborator account calling Heller and Kostolany co-founders of Fiduka and dating their seminars to 1974. Valuable near-primary evidence but not independent of the partnership's legacy.
11. Capital Kostolany archive - Magazine-controlled source confirming more than 30 years of Kostolany columns. It does not itself substantiate the widely repeated exact total of 414.
12. German Finance Ministry, February 2003 - Primary institutional history of German external debt. Corroborates Young-bond settlement and special currency-clause mechanics, but not Kostolany's personal lots or profit.
13. German Digital Library, Geld, das grosse Abenteuer - DNB-supplied bibliographic record confirming Kostolany as author, Desch as publisher, 1972 publication, and physical metadata.
14. German Digital Library, Das ist die Börse - DNB-supplied catalog record for the 1961 German book. Identifies Kostolany as author and Margaret Carroux and Francoise Roussel as contributors, an important authorship caveat.
15. Karlsruhe city-archive photograph, 1986 - Independent archival evidence of a Kostolany lecture and book signing on 8 October 1986; supports the public-seminar chronology, not attendance totals.
16. Friedrich Ebert Foundation authority index - Institutional authority aggregator for identity, dates, countries, and financial-adviser occupation. Useful corroboration while preserving nationality ambiguity.
17. DIE ZEIT, “Alte Staatsanleihen,” 2011 - Retrospective discussion of historic sovereign paper and Kostolany's tsar-bond success claim. It does not disclose a trade ledger, position size, or complete return calculation.
18. Tagesspiegel review of Die Kunst, über Geld nachzudenken, 2000 - Contemporary posthumous review. Documents the book's legacy while criticizing repetition and the retrospective elevation of the author.
19. German Digital Library, 2023 Kostolanys Wunderland edition - Institutional catalog evidence that publishers continue to reissue his work; not evidence that posthumous sales validate his investment results.
20. DIE ZEIT, “Abschied von den Mischlingen,” 1994 - Contemporaneous press record of Kostolany's familiar 51%-right/49%-wrong aphorism. It is a reported saying, not a scored recommendation database.
21. taz obituary, 1999 - Contemporaneous obituary supporting the exact life dates, family-reported heart failure, U.S.-citizen description, Paris apprenticeship, and reported G. Ballai tenure. It remains press evidence rather than a naturalization or corporate record.
22. Audited FIDUKA-UNIVERSAL-FONDS I annual report, 2025 - Audited current fund document saying Kostolany and Heller initiated the fund in 1989. It does not identify Kostolany as portfolio manager or isolate an attributable return series.
23. Official Fiduka founding history - Corporate account saying Heller developed the private-depot-management idea and invited Kostolany to contribute know-how before they resolved to found the firm. Interested but useful for role boundaries.
24. Posthumous WELT item under Kostolany's byline, 2000 - Published five months after his death and gives Russian-bond and Chrysler endpoints. Its original and editorial provenance is unresolved, and its Chrysler basis differs from the 1998 BR version.
25. French government publication of the Franco-Russian settlement - Primary legal source confirming the aggregate settlement framework. It does not establish Kostolany's bond ownership, quantity, payment, or personal return.

Evidence limitations

• No annual personal-account or fund return series, audit, benchmark, fee schedule, tax record, position ledger, or estate accounting was located.
• The Young-bond and Chrysler numbers are first-person recollections. Independent sources corroborate the securities or settlement context, not Kostolany's lots, weighting, timing, or proceeds.
• Fiduka's corporate history is marketing material and Heller's chronology is a close-collaborator account. Together they support association and founding-era influence, but not an attributable Kostolany composite or AUM series.
• Exact lifetime totals for books, translations, copies, seminars, students, lectures, and Capital columns conflict across self-report, obituaries, and later publicity. The profile reports only what each source actually establishes.
• Birth-name, middle-name, citizenship, education, and G. Ballai title variants remain unresolved because civil, university, naturalization, and corporate records were not located.
• Bounded multilingual adverse searches did not identify a reliable personal criminal, civil, or regulatory action. That negative result is jurisdiction- and archive-limited and cannot support a universal clean-record claim.

Task B - Investment Philosophy (T0496)

As of 2026-07-18T10:19:51Z. Sources are ranked by evidentiary value for Kostolany's investment philosophy, direct statements, book provenance, public-market process, adverse critique, current/deceased status, and source limitations. Kostolany should be treated as a public speculator, author, columnist, educator, and FIDUKA-linked adviser, not as an audited fund manager.

Guiding questions

1. What did Kostolany believe actually moves markets over short, medium, and long horizons?
2. What did he mean by "speculation," and how did he distinguish speculators, investors, and players?
3. What mispricings did he try to exploit: forced selling, public euphoria, rate/liquidity surprises, geopolitical normalization, or neglected distressed paper?
4. What process can be reconstructed for idea sourcing, research, entry, sizing, portfolio construction, and selling?
5. Which rules are robust and which are quote-level folklore that becomes dangerous without conditions?
6. What adverse evidence matters: legal/regulatory records, unaudited performance, simplified quotes, timing failures, or posthumous interpretation?

Annotated source map

1. BR Alpha-Forum transcript, 18 June 1998 - Tier 1 primary interview. Best single source for his biography, anti-academic stance, mass psychology, "four Gs," sleeping-pill advice with conditions, need for surplus capital, Chrysler and German foreign-bond anecdotes, derivatives rejection, blue-chip preference, no-tip caveat, and 1987 crash interpretation.
2. WELT - "Von Boersenspielern und Spekulanten," 14 February 2000 - Tier 1 near-primary book excerpt from Die Kunst, ueber Geld nachzudenken. Supports taxonomy of player/investor/speculator, rejection of day trading, broad blue-chip investor advice, late-life shift toward investor behavior, and qualitative portfolio construction.
3. WELT - "Der ewige Wettstreit zwischen Aktien und Dummkoepfen," 16 February 2000 - Tier 1 near-primary book excerpt. Supports market-as-capitalism-motor, supply/demand as core mechanism, long-term background music of peace and economic development, and the dog/master framework for economy versus market.
4. WELT - "Geld + Psychologie = Tendenz," 17 February 2000 - Tier 1 near-primary book excerpt. Supports the liquidity-plus-psychology equation, central-bank/rate sensitivity, new-issue supply, skepticism toward accounting data as timing tools, and inflation-policy distinctions.
5. WELT - "Nur die Hartgesottenen gehoeren zu den Gewinnern," 18 February 2000 - Tier 1 near-primary book excerpt. Supports hard-boiled versus shaky hands, the four Gs, overbought/oversold markets, cycle phases, "Kostolany egg," 1982-1987 cycle anatomy, credit risk, and calmness with fully paid securities.
6. WELT - "Spekulanten brauchen Handwerkszeug," 19 February 2000 - Tier 1 near-primary book excerpt. Supports idea sourcing, reading between the lines, fait accompli logic, expectation-versus-news reactions, distrust of bank/broker/analyst promotion, New Market criticism, anticyclical buying/selling, and anti-guru/no-tip stance.
7. FinanzBuch Verlag sample - Kostolanys Wunderland von Geld und Boerse, 1982/2023 - Tier 1 reprint excerpt. Supports early worldview, speculation as independence, cross-asset experience, money as freedom, and his self-identification as speculator and market man. The 2023 edition follows the 1982 first publication but warns that some passages are historically dated.
8. Ullstein author page - Publisher/rights-holder source for biography: born 1906 in Hungary, studied philosophy and art history, career began at the Paris Bourse, worked at major exchanges, died in Paris in 1999, and author of later works. Promotional praise is not used as performance validation.
9. Ullstein - Die Kunst, ueber Geld nachzudenken - Publisher source for his final philosophy book, its subject scope, edition metadata, and claim that it covers what moves markets, psychology/emotions, medium/long-term factors, and rules for speculators.
10. Ullstein - Weisheit eines Spekulanten - Publisher source for the Johannes Gross interview book and its positioning as career/market-history testimony. Useful for provenance; not a substitute for full-text verification of claims.
11. EconBiz/ZBW record - Weisheit eines Spekulanten: Andre Kostolany im Gespraech mit Johannes Gross - Library/bibliographic source. Confirms 1996 ECON publication, 207 pages, German language, interview subject, and ISBN.
12. BnF authority record - Authority-control source. Confirms 1906-1999, death on 1999-09-14 in Paris, Hungarian country/language metadata, author role, and description as banker/specialist in stock-market operations.
13. Deutsche Biographie / GND - Authority-control source. Confirms life years and occupations as financial expert/adviser; useful for current/deceased status and name variants.
14. FIDUKA history - Firm source. Confirms FIDUKA's 1971 founding and that Gottfried Heller and Kostolany shaped it for decades through seminars, lectures, and columns; says Kostolany accompanied the firm with knowledge and experience until his death. Not an independent performance source.
15. FIDUKA Kostolany Boersenseminare - Firm source for seminars since 1974, investor education role, and ongoing institutional lineage. Use for education/platform context, not as proof of personal investment returns.
16. Tagesschau - 25th death-anniversary profile, 14 September 2024 - Strong public-broadcaster secondary. Supports deceased/current status, public persona, no-single-stock-tip framing, four Gs as still cited, sleeping-pill reception, biography, Nazi-flight context, and anti-guru humility.
17. WDR Neuer Markt retrospective - Strong public-broadcaster secondary. Supports the 1998 New Market warning, the March 2000 peak around 8,600, later collapse, fraud/accounting scandals, delistings, and 2003 dissolution.
18. Gottfried Heller - "Eine voellig falsche Sicht auf Andre Kostolany," 26 August 2020 - Close-associate rebuttal, valuable but conflicted. Supports quote-provenance caution, the more cautious sleeping-pill wording, panic-selling interpretation, and New Market criticism. Treat as testimony from friend/business partner rather than independent verification.
19. Gottfried Heller interview - "Geld muss arbeiten," Die Welt, 3 August 2008, republished by Heller - Close-associate/adverse source. Supports the Ronny-Bonds mistake, the 51/49 wrong-right framing, post-1987 buying recollection, distrust of banks and guarantee products, and the danger of falling in love with an idea.
20. Scalable Capital / Stefan Mittnik - "Aktiv oder passiv - das ist nicht die Frage," 5 August 2020 - Modern critique. Useful for the limits of simplified sleeping-pill buy-and-hold when applied to wrong stocks, Neuer Markt-type sectors, Deutsche Telekom, and changing index constituents.
21. Scalable Capital / Stefan Mittnik - "Bloss nicht nervoes werden," 24 April 2017 - Modern critique. Supports psychological risk of buy-and-hold through large drawdowns, DAX 2000-2003 and 2007-2009 declines, and need for diversification/rebalancing. It critiques a simplified quote, not Kostolany's full conditional advice.
22. Handelsblatt - "Andre Kostolany: Was wirklich hinter seinen Zitaten zum Boersenmarkt steckt," 2025 - Secondary overview. Useful for quote reception, humanistic/anti-academic context, and 49/51 persona; limited by visible excerpt/paywall.
23. Comdirect magazine profile - Secondary bank-magazine source. Useful for caveats around public persona, near-bankruptcy/loss framing, and how German retail investors remember him. Not used for hard numbers without corroboration.
24. justETF - "10 Andre Kostolany quotes that explain the stock market," 2023 - Lower-tier quote/reception source. Useful only for how quotes circulate in modern retail education; not used as original provenance for any quote.

Evidence limitations and cautions

• No audited personal or fund-level return series was found. Treat Chrysler, German foreign-bond, Russian state-paper, 1987 crash, and other trade anecdotes as philosophy evidence and label exact returns as self-reported or memoir-based unless later tasks triangulate them.
• The WELT 2000 articles are excellent near-primary material but are edited pre-publication excerpts from Die Kunst, ueber Geld nachzudenken. They should not be counted as five independent underlying works for source-diversity purposes.
• Quote aggregation is especially risky for Kostolany. The sleeping-pill maxim has multiple variants; the BR transcript and Heller correction are preferred over quote sites.
• Sales totals for his books conflict across sources and were not needed for Task B. Avoid exact figures unless tied to publisher or high-quality media evidence.
• Nationality/citizenship is messy. Safest formulation: Hungarian-born, Paris/New York/France-Germany career, wrote in German and French; avoid a single clean nationality label unless a future profile task verifies it.
• Targeted public-web searches for SEC, DOJ, BaFin, CourtListener, Justia, Casetext, German "Klage/Prozess," and exact-name variants did not surface direct enforcement or litigation against Kostolany. This is a bounded negative search, not a legal clearance.
• FIDUKA sources establish institutional connection and educational lineage. Later FIDUKA fund or asset-management results should not be imputed to Kostolany without contemporaneous records.
• Heller sources are important because he was a long-term friend and business partner, but they are naturally conflicted when defending Kostolany from criticism.

Task C - Greatest Trades (T0497)

As of 2026-07-18T11:06:13Z. This source map is intentionally limited to the exact URLs cited in greatest-trades.md. Sources corroborating a security, corporate crisis, treaty, or market event do not thereby corroborate Kostolany's ownership, position size, or P&L.

Annotated source map

1. Bayerischer Rundfunk Alpha Forum interview transcript, 1998 - Tier 1 first-person interview. Core evidence for the Young-bond and Chrysler positions, stated entries and endpoints, four-year Young holding period, adding after the bond fell, Chrysler split/dividend description, and his own “best bond” and “best stock” labels. It contains recollections, not account records.
2. German Finance Ministry history of the London Debt Agreement, 2003 - Tier 1 institutional context. Confirms the 1930 Young loan, 1953 restructuring, currency-clause calculations, exchanges, cash redemption possibilities, and funding mechanics. It does not identify Kostolany or verify his lots and proceeds.
3. U.S. Government Accountability Office, Chrysler rescue study, 1984 - Tier 1 official corporate-crisis context. Confirms Chrysler's near-bankruptcy condition, public assistance, and out-of-court financial and operational restructuring. It does not prove Kostolany's purchase.
4. SEC Chrysler filing, 1994 - Tier 1 company filing used to check Chrysler's 1986 3-for-2 split history. Supports split mechanics only.
5. UPI, Chrysler approves 3-for-2 split, 1987 - Contemporaneous press record used to check the second 3-for-2 Chrysler split. It is not trade evidence.
6. SEC DaimlerChrysler F-4, 1998 - Tier 1 filing used for Chrysler's 1996 2-for-1 split and 1998 market-price ranges. Makes Kostolany's split-adjusted endpoint arithmetically plausible without establishing his ownership or sale.
7. WELT, “Geschaeft mit kleinen Taenzerinnen,” 2000 - Near-primary, posthumously published item under Kostolany's byline. Supplies the 1989 Russian-bond thesis, five-franc basis, estimated 300-franc settlement value, and a $3 Chrysler basis that conflicts with $3.50 in the direct interview. Editorial provenance is unresolved, so its endpoint multiples remain memoir claims.
8. HP-Magazin reprint of a Kostolany Capital column, 1991 - Contemporaneous bylined-column reprint. Says he had bought Russian imperial bonds around two years earlier near 1% of nominal and records an interim rise to about 60 francs, or 12% of a 500-franc bond. It supports contemporaneous ownership and an interim mark, not the later 300-franc estimate or realized P&L.
9. Légifrance publication of the Franco-Russian agreements, 1998 - Tier 1 legal source. Confirms the 26 November 1996 memorandum, 27 May 1997 agreement, $400 million aggregate settlement, eight installments, and inclusion of imperial-bond claims. It does not prove Kostolany's titles, eligibility, or distribution.
10. Conseil d'État, decision 226489, 2003 - Tier 1 legal interpretation. Establishes that the indemnification did not repay the securities or deprive holders of them, an important correction to simplified “redemption” language.
11. French Senate written answer on Russian-claim compensation, 1999 - Tier 1 legislative record. Confirms that Russian installments accumulated in a French Treasury account while holder registration and distribution rules were still being determined.
12. French Senate written answer on distribution formula, 2000 - Tier 1 legislative record. Confirms the later compensation formula and 2000 implementation, after Kostolany's death; therefore the WELT 60x estimate is not proof of his personal cash realization.
13. Bibliothèque nationale de France authority record - Institutional identity record used for the 14 September 1999 death date and to establish that the 2000 WELT item was posthumous.
14. FinanzBuch Verlag sample, Morrien and Vinkelau, 2020 - Publisher excerpt quoting Kostolany's memoir narrative. Core evidence for the two-share Laurium cash purchase, 25-share financed Mocambique purchase, approximate double, subsequent Russian nonvaleur double to about $200, and the 1929–1932 bearish-book account. It is one memoir chain, not independent transaction verification.
15. Banque de France, French banking-crisis research, 2018 - Institutional research confirming the timing and severity of the 1930–1931 French banking crisis and Oustric context. It does not mention Kostolany.
16. Berliner Zeitung interview, 1997 - Direct adverse interview. Kostolany says he lost all his money in the 1929 episode, preventing the bearish campaign from being presented as a clean, quantified greatest trade.
17. U.S. Office of the Historian, Dawes and Young Plans, accessed 2026 - Tier 1 government history fixing the Hoover moratorium proposal in 1931, not 1930 as some later retellings imply.
18. Gottfried Heller interview, “Geld muss arbeiten,” 2008 - Close-associate testimony used adversely. It attributes the post-1987 buying and two-year tripling to “we,” not to an identifiable Kostolany personal account, and calls the earlier Ronny-bond holding an opportunity-cost mistake.
19. DIE ZEIT, “Amuesante Plaudereien,” 1983 - Contemporaneous critical review questioning whether Kostolany made more money from trading or books and lectures. Supports the no-audited-track-record boundary.

Verification and arithmetic notes

• Young bond: 35,000 / 250 = 140x gross and 13,900% simple gain; 35,000 / 350 = 100x and 9,900%. Both are unannualized first-person endpoints. Exact dates, franc convention, coupons, costs, tax, quantity, and payment records are absent.
• Chrysler: $140–150 / $3.50 = 40.0–42.86x gross endpoint and 3,900–4,186% simple price gain. The posthumous $3 basis would imply 46.67–50x and 4,567–4,900%. The direct account says “if” sold, so neither is a documented realized return.
• Russian imperial bonds: the 1991 column reprint records an interim 60-franc mark, while 300 / 5 = 60x and 5,900%; the later 300-franc figure was an estimate. Official records show individual distributions were not implemented until 2000; no Kostolany or estate claim was found.
• Laurium/Mocambique: stated gross exposure was approximately 2 × 400 + 25 × 30 = 1,550 francs. A precise double would mean about 3,100 francs of proceeds and 1,550 francs of gross gain, but the Mocambique leg was financed and sale prices and costs are unknown.
• Early Russian shares: the memoir chain says the capital doubled to about $200, implying an approximate $100 starting amount and 100% gain. Issuers, lots, dates, currencies, and tickets are absent.
• Paris bearish book: no defensible percentage or absolute P&L can be calculated. Profitable legs and a total-loss recollection coexist in the source record.

Evidence limitations and exclusions

• No audited personal or fund return series, annual account values, position ledger, trade confirmations, benchmark, fee schedule, tax record, or estate inventory was located.
• The three spectacular numerical stories are each single-source personal or memoir accounts. Institutional sources corroborate only the securities and external catalysts; the chapter labels the arithmetic accordingly.
• The 1987 recovery, 1993–1997 broad equity call, Ronny bonds, Neuer Markt warning, Japanese-fund comments, German reunification, silver, and gold were excluded from the six-case ranking because ownership, provenance, exit, or arithmetic failed the threshold.
• Bounded searches of public SEC, DOJ, BaFin, court, German press, and exact-name records found no direct enforcement or litigation that materially changes these trade accounts. This is not a legal clearance.
• Kostolany died in 1999. Current products, funds, or claims using his name must not be treated as his performance.

Task D - Mistakes and Losses (T0498)

As of 2026-07-18. This source map is intentionally limited to the exact URLs cited in mistakes-and-losses.md. A source that corroborates a market event does not thereby corroborate Kostolany's ownership, leverage, or P&L.

Annotated source map

1. Bayerischer Rundfunk Alpha Forum interview transcript, 1998 - Tier 1 first-person interview. Core evidence for the prewar total loss, enormous debts, suicidal thoughts, colleagues' help, several failed speculations, his direct misjudgment diagnosis, bad experiences giving tips, mature surplus-capital rule, and rejection of retail derivative buying. It supplies no account values or dated loss ledger.
2. Berliner Zeitung interview, 1997 - Tier 1 direct interview. Anchors his statement that he lost all his money in the 1929 episode and records late-life half-sale, loss-limitation, 450-500-title, long-holding, and sufficient-capital comments. It does not identify the 1929 positions or reconcile later episodes.
3. FinanzBuch Verlag sample, Morrien and Vinkelau, 2020 - Publisher-authorized secondary excerpt drawing on Kostolany's memoir. Supplies the profitable Oustric/Devilder/Kreuger leg narrative. It is a single retrospective chain, not transaction evidence.
4. Banque de France banking-crisis research, 2018 - Institutional historical research. Confirms the late-1930/1931 French banking-panic and Oustric context; it does not mention Kostolany.
5. Süddeutsche Zeitung, “Der große Gegenspieler,” 2010 - Later journalistic reconstruction separating a profitable Oustric short from a subsequent Hoover-moratorium wipeout. Useful for the chronology conflict, not an independent account statement.
6. U.S. Office of the Historian, Hoover-moratorium history, accessed 2026 - Tier 1 government history. Dates Hoover's proposal to 19-20 June 1931 and establishes the policy context; it does not corroborate Kostolany's position or loss.
7. Gottfried Heller interview, “Geld muss arbeiten,” 2008 - Close-associate adverse testimony. Supports the team's early-1980s Ronny-bond opportunity-cost mistake and thesis-attachment lesson. The plural attribution and absent securities prevent treating it as a measured personal Kostolany loss.
8. WELT, “Die Zocker haben verloren,” 1995 - Contemporaneous press account. Records Kostolany contemplating Japan-fund purchases and supplies a usable early-view counterexample; it does not confirm execution.
9. Nikkei official market history, accessed 2026 - Tier 1 index-provider history. Confirms continued Japanese-market weakness through 12,879 in 1998 and 7,054.98 in 2009. This market path does not prove a Kostolany loss.
10. DIE ZEIT, “Abschied von den Mischlingen,” 1994 - Contemporaneous source for the 51%-right/49%-wrong saying. No trade database accompanied it, so the chapter treats it as an aphorism rather than a hit rate.
11. DIE ZEIT, “Amüsante Plaudereien,” 1983 - Contemporaneous critical review questioning whether trading or books and lectures produced more financial success. Supports the unaudited-record boundary.
12. Tagesspiegel obituary, 1999 - Contemporary obituary reporting two complete fortune losses. It gives no reconciled dates, statements, or proceeding, so the chapter labels the count unverified press shorthand.
13. WELT profile, 2006 - Later press profile reporting that he went pleite several times and suffered a 1940 wealth loss. The colloquial wording does not prove formal insolvency and is too imprecise to classify the wartime shock as investment P&L.
14. Kostolany, Geld, das große Abenteuer, authorized digital reprint, 1972/2022 - Tier 1 self-authored memoir source. Supports the losing corn-bacon spread, ambiguous silver paper-profit reversal, losing refrigerated-egg short, imponderables lesson, and the separate 1914 brother-Emmerich raffia story. It contains recollections, not account records, and its policy dates require external correction.
15. USDA, Livestock Market News Statistics and Related Data, 1880-1949, 1950 - Tier 1 agency statistical record. It dates government purchases for the Emergency Hog Production Control Program from 22 August to 7 October 1933, making Kostolany's “spring 1933” timing loose while corroborating the later policy mechanism, not his trade.
16. U.S. Statutes at Large, Silver Purchase Act, 1934 - Tier 1 enacted statute showing the Silver Purchase Act became law on 19 June 1934. Corrects the memoir's 1933 dating without verifying his London silver position.
17. FIDUKA imprint, accessed 2026 - Current firm source for present supervision and registrations. Used only to prevent back-attributing the current firm's legal status to Kostolany personally.

Verification and classification notes

• “All my money” is not a calculable drawdown without beginning equity, outside assets, liabilities, cash flows, and dates. No absolute loss or percentage is assigned.
• The direct 1929 total-loss statement, memoir-supported 1930 profitable legs, and later 1931 wipeout may describe separate positions. They are not merged into a single clean campaign.
• Ronny bonds are classified as team-level opportunity cost, not a nominal loss; Japan is classified as an early public view, not a confirmed trade.
• The claim of two complete fortune losses and colloquial reports that he went pleite several times are not supported by two account snapshots or a located insolvency proceeding.
• The 1914 raffia loss and suicidal talk concerned his brother Emmerich in Kostolany's own account; it is not André's loss and must not be merged with his later personal disclosure.
• Corn-bacon and egg losses are self-authored memoir cases with no account sizes. Silver is classified as an erased paper gain with internally ambiguous capital P&L, not a proven realized loss.
• Process changes are divided into direct first-person diagnoses, documented mature rules whose causal origin is unknown, and Heller's associate-level lesson.
• No audited personal return series, complete losing-trade ledger, position-size rule, leverage cap, postmortem template, or forecast scorecard was located.
• Bounded court, regulator, enforcement, and insolvency searches found no reliable personal proceeding; this limited negative result is not legal clearance.

Task F - Key Writings (T0500)

As of 2026-07-18. This source map covers the exact URLs cited in key-writings.md. Catalog manifestations, translations, edited selections, posthumous compilations, serial excerpts, and interviews are not counted as independent sole-authored works.

Annotated source map

1. BR Alpha Forum interview transcript, 1998 - Best extended first-person source for Kostolany's late-life bibliography claim, career stories, philosophy, and repeated anecdotes. It is oral testimony, not audited performance evidence.
2. WELT prepublication installment, 14 February 2000 - Contemporary notice calling the posthumous final book his thirteenth, plus the first authorized serialized excerpt. The series is one underlying book.
3. BnF record for Si la Bourse m'était contée - Institutional catalog supporting the 1960 French original and Françoise Roussel's collaboration.
4. DDB record for Das ist die Börse - DNB-supplied German-edition record naming Margaret Carroux and Françoise Roussel; prevents false duplication and sole-author flattening.
5. BnF record for L'Aventure de l'argent - Calls the work Françoise Kostolany's French translation and adaptation of Geld, das große Abenteuer.
6. DNB-derived record for Kostolanys beste Geldgeschichten - Identifies Hubert Spegel as selector/compiler, making this an edited anthology rather than a fresh solo monograph.
7. Ullstein, Der große Kostolany - Current publisher record showing that this posthumous product combines three prior books.
8. EconBiz, Weisheit eines Spekulanten - Bibliographic record establishing the conversation with Johannes Gross and its 1996 publication.
9. Ullstein, Die Kunst, über Geld nachzudenken, ebook - Publisher metadata for the posthumously released final work; it does not disclose the final editing chain.
10. Ullstein, Die Kunst, über Geld nachzudenken, paperback - Current publisher description of the final book's scope and edition status.
11. DNB contents for Die Kunst, über Geld nachzudenken - Institutional table of contents used only to identify the best reading sections.
12. WELT installment, 16 February 2000 - Authorized excerpt on supply/demand and the economy-market relationship.
13. WELT installment, 17 February 2000 - Authorized excerpt on liquidity, interest rates, and psychology.
14. WELT installment, 19 February 2000 - Authorized excerpt on information, expectations, promotion, and contrarian execution.
15. DDB, Geld, das große Abenteuer - Institutional bibliographic record for the 1972 book.
16. DNB original-edition contents for Geld, das große Abenteuer - Primary navigation evidence for the recommended chapters; no chapter text is reproduced.
17. FinanzBuch Verlag authorized Wunderland sample - Publisher excerpt confirming the 1982 underlying work and the current edition's warning that historically dated text was preserved.
18. FinanzBuch Verlag authorized Wunderland contents - Publisher table of contents used to select sections.
19. EconBiz, Kostolanys Börsenseminar - Bibliographic record for the 1986 question-and-answer primer.
20. DNB contents for Kostolanys Börsenseminar - Institutional navigation source for the recommended question clusters.
21. DNB-derived record for Kostolanys Börsenpsychologie - Catalog evidence for the 1990 publication date.
22. DNB contents for Kostolanys Börsenpsychologie - Institutional navigation source for the recommended lectures.
23. Ullstein, Weisheit eines Spekulanten - Current publisher record explicitly preserving Johannes Gross's role.
24. Tunisian National Library, Suez - National-library record for the 1939 corporate history.
25. BnF, La Paix du dollar - National-library record for the 1957 monetary-geopolitical work and Robert Schuman preface.
26. Tunisian National Library, La Grande confrontation - National-library record for the 1959 postwar political pamphlet.
27. FinanzBuch Verlag, Mehr als Geld und Gier - Publisher provenance for the retitled Kostolanys Notizbuch and its thematically ordered notes.
28. DNB-derived record, … und was macht der Dollar? - Catalog record for the 1987 currency-speculation book.
29. EconBiz, Kostolanys Bilanz der Zukunft - Bibliographic record for the 1995 work and Johannes Gross foreword.
30. Kostolany, “Der Fiskus als Spekulations-Partner,” DIE ZEIT, 1961 - Genuine bylined article offering a compact distressed-sovereign checklist.
31. Kostolany, “Das tragische Ende des Herrn Ivar Kreuger,” DIE ZEIT, 1961 - Genuine bylined early account of information asymmetry and the Kreuger collapse.
32. HP-Magazin archival scan, 1991 - Authorized reprint of a Capital column, providing contemporaneous Russian-bond evidence and Kostolany's warning to readers.
33. Licensed edition foreword documenting the Capital corpus - Publisher/editor provenance for the reported March 1965-to-October 1999 chronology and 414 appearances; not an independently audited issue ledger.
34. DIE ZEIT, “Das reine Spielkasino,” 1980 - Edited interview on the gold bubble. Primary oral material, not a bylined essay.
35. Péter Fodor, “Tőzsde és storytelling,” 2024 - Best independent scholarship located on Kostolany's prose, story migration, anecdotal authority, and name as brand. Short literary/cultural analysis, not performance research.
36. DIE ZEIT, “Amüsante Plaudereien,” 1983 - Contemporaneous adverse review questioning the relationship between Kostolany's trading, books, and lectures.
37. Tagesspiegel review of Die Kunst, 2000 - Contemporary critical review crediting psychological calm while faulting repetition, generality, and self-regard.
38. Morrien and Vinkelau publisher excerpt, 2020 - Accessible portion of the only recent dedicated book-length biography found; useful but memoir-dependent and introduced by close associate Gottfried Heller.
39. WELT obituary/profile, 1999 - Contemporaneous reception and biography, but repeats colorful claims without account evidence.
40. Tagesspiegel obituary, 1999 - Independent contemporary profile used with the WELT account to triangulate public reception and conflicting chronology.
41. German Copyright Act §64 - Official life-plus-70 term rule.
42. German Copyright Act §65 - Official joint-work term provision; collaborations require separate term analysis.
43. Kostolany, Geld, das große Abenteuer, authorized digital-edition preview - Substantial publisher-authorized preview extending into chapter 2; later-chapter themes are anchored separately to the institutional contents and accessible later primary statements.
44. WELT installment, 18 February 2000 - Authorized excerpt supporting the four requirements, strong-versus-weak-holder distinction, and three-phase cycle.
45. DNB contents for Das ist die Börse - Institutional navigation evidence for the early French/German market narrative; no chapter text is reproduced.

Evidence and provenance limits

• No personal trading ledger, audited return series, estate accounting, attributable fund record, complete Capital issue index, royalty statement, or publicly cataloged personal-papers archive was found.
• The chapter counts underlying works, not every edition or translation. Collaborators, translators, compilers, interviewers, and posthumous packaging are retained in the attribution.
• The books and interviews establish Kostolany's stated framework and evolving public voice, not his wealth, hit rate, or investment performance.
• The exact Capital count is licensed publisher/editor provenance without a recovered issue-by-issue archive. The six WELT pages are one serialized book.
• Bounded multilingual adverse and legal searches found no reliable personal proceeding; that negative result is not legal clearance.
• Copyright remains active. The chapter paraphrases, reproduces no substantive passage, and uses tables of contents only as navigation evidence.

Task G - Mental Models (T0501)

As of 2026-07-18. This source map covers the exact URLs cited in mental-models.md. The chapter distinguishes Kostolany's direct models from Canon adaptations and modern safeguards; current FIDUKA activity is not treated as his personal implementation.

Annotated source map

1. Morrien and Vinkelau publisher excerpt, 2020 - Accessible secondary biography excerpt with a foreword by close associate Gottfried Heller. Useful for the explicit “rules, not a system” boundary, but interested and memoir-dependent.
2. WELT, “Von Börsenspielern und Spekulanten,” 14 February 2000 - Posthumous authorized book excerpt supporting the player/investor/speculator taxonomy and diversified long-horizon investor conditions.
3. WELT, “Geschäft mit kleinen Tänzerinnen,” 15 February 2000 - Authorized excerpt supporting cross-asset speculation, Russian-bond/Chrysler stories, the long-view metaphor, and the warning against relabeling failed speculation.
4. WELT, “Der ewige Wettstreit zwischen Aktien und Dummköpfen,” 16 February 2000 - Authorized excerpt for the long-run economy/market relationship and supply-demand framework.
5. Fodor, “Tőzsde és storytelling,” 2024 - Independent literary/economic-cultural analysis stress-testing the dog metaphor, story migration, anecdotal authority, and Kostolany brand.
6. WELT, “Geld + Psychologie = Tendenz,” 17 February 2000 - Authorized excerpt for the medium-term equation, rate/liquidity transmission, issuance, bond competition, and the direct twelve-month lag claim.
7. WELT, “Nur die Hartgesottenen gehören zu den Gewinnern,” 18 February 2000 - Authorized excerpt for technical condition as ownership, four Gs, overbought/oversold states, three phases, and the Kostolany egg.
8. WELT, “Spekulanten brauchen Handwerkszeug,” 19 February 2000 - Authorized excerpt for information sourcing, incentives, between-the-lines reading, expectations, and fait accompli.
9. BR Alpha Forum transcript, 1998 - Best full direct interview for four Gs, 2×2=5−1, conditional sleeping-pill advice, personal circumstances, derivatives, and the Young/Chrysler recollections.
10. German Finance Ministry, London Debt Agreement history, 2003 - Official evidence for Young-bond settlement mechanics, not Kostolany's ownership or profit.
11. U.S. GAO Chrysler rescue study, 1984 - Official corporate-distress and restructuring context; does not prove Kostolany's trade.
12. HP-Magazin archival scan, 1991 - Contemporaneous authorized Capital-column reprint supporting Russian-bond ownership and an interim mark, not final realized P&L.
13. Légifrance, Franco-Russian settlement, 1998 - Primary legal settlement framework; does not identify Kostolany or prove an individual distribution.
14. Kostolany, Geld, das große Abenteuer, authorized digital-edition preview - Substantial self-authored preview supporting imponderables and the corn-bacon, silver, refrigerated-egg, and family raffia cases. Memoir chronology still requires external checking.
15. USDA livestock statistics, 1950 - Official policy chronology correcting the corn-hog program timing while not verifying the trade.
16. U.S. Silver Purchase Act, 1934 - Enacted statute correcting the memoir's silver-policy year; not position evidence.
17. Heller correction of the sleeping-pill slogan, 2020 - Close-associate testimony restoring diversification, five-to-six-year, and anti-panic conditions. Materially conflicted as a defense of friend and partner.
18. Mittnik, “Bloß nicht nervös werden,” 2017 - Modern adverse test of simplified buy-and-hold through deep drawdowns, behavioral stress, and portfolio drift; author has a robo-adviser conflict.
19. WDR, Neuer Markt retrospective, 2007 - Public-broadcaster record of Kostolany's warning and the segment's subsequent collapse; no short position or complete forecast ledger.
20. Heller, “Geld muss arbeiten,” 2008 - Close-associate evidence for team-level Ronny-bond opportunity cost and post-1987 buying; plural attribution prevents personal-account treatment.
21. WELT interview, “Die Zocker haben verloren,” 1995 - Direct public Japan contemplation and strong-hands diagnosis; contemplation is not execution.
22. Nikkei official market history - Index-provider evidence that Japanese equities fell much further after the 1995 view; not a Kostolany loss record.
23. DIE ZEIT, “Amüsante Plaudereien,” 1983 - Contemporaneous adverse review questioning whether trading or publishing produced more financial success.
24. FIDUKA corporate history - Interested current firm source for institutional association; current practice and results cannot be back-attributed to Kostolany.
25. Barber and Odean, “Trading Is Hazardous to Your Wealth,” 2000 - Peer-reviewed household-account evidence that frequent retail trading underperformed in the study; a modern stress test, not validation of Kostolany's speculative record.
26. Bessembinder, “Wealth Creation in the U.S. Public Stock Markets,” 2020 version - Modern evidence that aggregate long-run wealth creation was concentrated in relatively few stocks, limiting literal use of the dog-and-master metaphor for individual names.
27. Brunnermeier and Pedersen, “Market Liquidity and Funding Liquidity,” 2009 - Peer-reviewed mechanism for reinforcing funding and market-liquidity spirals; supports a modern audit of forced sellers without validating “strong hands” labels.
28. Shleifer and Vishny, “The Limits of Arbitrage,” 1997 - Modern research on capital withdrawal and interim loss, used to constrain the 2×2=5−1 metaphor rather than promise convergence.
29. Berliner Zeitung interview, 1997 - Direct late-life interview reporting roughly 450–500 holdings; not a recommended portfolio count or independently verified inventory.
30. HP-Magazin review, 1983 - Near-contemporary review summarizing Kostolany's buy/review/sell commandments and behavioral prohibitions. Useful operational evidence, but secondary to the underlying edition.
31. DNB contents for Geld, das große Abenteuer, 1972 - Institutional navigation evidence placing the money-plus-psychology equation and 2×2=5−1 in the 1972 book; no text is reproduced.
32. DNB contents for Wunderland Börse - Institutional navigation evidence placing the egg and commandments/prohibitions in the 1982 work; the contents do not establish detailed wording.

Evidence and reconstruction limits

• No audited personal return series, position ledger, trade scorecard, or attributable fund composite was located.
• No public numeric sizing rule, leverage cap, correlation limit, stop-loss rule, drawdown limit, or formal review cadence was found.
• The decision checklist is a Canon reconstruction. Modern position limits, falsifiers, and prospective journaling are safeguards added to make the direct metaphors testable.
• WELT's six installments are one posthumous serialized book. Repeated use reflects distinct passages, not six independent underlying works.
• Heller is a close associate and FIDUKA custodian; Mittnik has a robo-adviser conflict. Their disagreement is used as an adverse boundary, not a verdict.
• Cases corroborate external events more often than Kostolany's ownership, sizing, or P&L. Unverified personal figures are not converted into performance evidence.
• Copyright-safe paraphrase is used throughout; no substantive book passage or complete commandment list is reproduced.

Task H - Synthesis (T0502)

As of 2026-07-18T14:06:47Z. This source map covers the exact external URLs cited in synthesis.md. T0499 E-own-words was still freshly claimed and unavailable on main when H was closed; T0501 G-mental-models landed before closeout and is reflected in the synthesis.

Annotated source map

1. Bibliotheque nationale de France authority record - Institutional identity source for Kostolany's 1906-1999 life dates, country assignment, death in Paris on 14 September 1999, author role, and banking/stock-market-operations description.
2. Fiduka history - Current firm source for the founding-era Kostolany/Heller relationship and the boundary between the live Fiduka business and Kostolany's historical role.
3. FIDUKA-UNIVERSAL-FONDS I annual report, 2025 - Audited fund report stating that the fund was initiated in 1989 by Kostolany and Gottfried Heller; used to avoid back-attributing later performance or current management to Kostolany.
4. WELT, "Geld + Psychologie = Tendenz," 2000 - Posthumous authorized excerpt from Die Kunst, uber Geld nachzudenken used for the liquidity-plus-psychology framework, rates, and expectations.
5. WELT, "Nur die Hartgesottenen gehoren zu den Gewinnern," 2000 - Posthumous authorized excerpt used for strong-hands/weak-hands holder analysis, patience, and cycle framing.
6. WELT, "Spekulanten brauchen Handwerkszeug," 2000 - Posthumous authorized excerpt used for information, expectations, public knowledge, and anti-tip discipline.
7. Bayerischer Rundfunk Alpha Forum interview transcript, 1998 - Best extended first-person interview; core source for philosophy, Young-bond and Chrysler recollections, ruin/debt testimony, surplus-capital rules, and derivative warnings. It is oral testimony, not audited account evidence.
8. German Finance Ministry history of the London Debt Agreement, 2003 - Tier 1 institutional context for Young bonds and postwar German debt settlement mechanics. It does not verify Kostolany's trades.
9. U.S. Government Accountability Office, Chrysler rescue study, 1984 - Official corporate-crisis context for Chrysler's near-bankruptcy and rescue/restructuring environment; not proof of Kostolany's ownership.
10. DaimlerChrysler SEC F-4, 1998 - Tier 1 filing used for Chrysler split and endpoint plausibility checks. It does not establish Kostolany's purchase, sale, dividends, or P&L.
11. Legifrance publication of Franco-Russian agreements, 1998 - Tier 1 legal source for the Franco-Russian pre-1945 claims settlement framework and aggregate payment schedule; not proof of Kostolany's titles or distributions.
12. French Senate answer on Russian-claim distribution, 2000 - Legislative record showing distribution implementation after Kostolany's death, a key boundary on realized Russian-bond P&L.
13. Berliner Zeitung interview, 1997 - Direct interview anchoring the 1929 total-loss statement and late-life capital/patience comments.
14. DIE ZEIT, "Amusante Plaudereien," 1983 - Contemporaneous critical review questioning whether trading or the book/lecture business generated more financial success; used for the no-audited-record warning.
15. WELT, "Geschaeft mit kleinen Taenzerinnen," 2000 - Posthumous byline item used for Chrysler and Russian-bond endpoint narratives; treated as provenance-sensitive memoir evidence.
16. WDR Neuer Markt chronology - Public chronology for Neuer Markt launch, peak, and collapse context; used to avoid turning remembered warnings into a complete forecast scorecard.
17. Tagesspiegel obituary/profile, 1999 - Contemporary reception source for his public role, no-tip framing, and repeated fortune-loss shorthand. Not account evidence.
18. Kostolany, Geld, das grosse Abenteuer, authorized digital preview - Self-authored memoir source for commodity, silver, and related lesson material; contains recollection, not trade confirmations.
19. U.S. Statutes at Large, Silver Purchase Act, 1934 - Official statutory source used to bound silver-policy chronology and correct memoir dating risk.
20. Gottfried Heller interview, "Geld muss arbeiten," 2008 - Close-associate source for Fiduka-era context and the Ronny Bonds opportunity-cost anecdote; treated as interested and plural-attribution evidence.
21. WELT, "Von Borsenspielern und Spekulanten," 2000 - Posthumous authorized excerpt used for speculator-versus-player framing, role selection, and late public-teaching context.

Evidence and provenance limits

• No audited personal return series, full trade ledger, estate accounting, attributable Fiduka composite, personal AUM series, or defensible peak wealth figure was found.
• H incorporates G mental-models, which landed before closeout, but E-own-words remained missing on main; a later E chapter should be checked for quote provenance that affects this synthesis.
• Trade stories are preserved as teaching cases, but their quoted multiples remain raw endpoint arithmetic unless account records, coupons, dividends, taxes, financing, and sale documents appear.
• Fiduka materials establish an association and one fund-initiation statement; they do not make current Fiduka funds a Kostolany track record.
• The WELT 2000 pieces are one posthumously serialized book source, not independent contemporary trade confirmations.

Task E - In Their Own Words (T0499)

As of 2026-07-18. This source map covers the exact URLs cited in in-their-own-words.md. The chapter retains original German wording, caps every quotation and every underlying-work aggregate at 25 words, and separates direct transcripts, edited interviews, bylined writing, authorized reprints, posthumous serialization, and reporter-selected attribution.

Annotated source map

1. BR Alpha Forum interview transcript, 1998 - Best accessible long oral primary source; anchors exact error, patience, 2×2, four-G, derivatives, computer, and conditional sleeping-pill context.
2. DIE ZEIT, “Das reine Spielkasino,” 1980 - Edited direct Q&A on the gold boom; only the openly verified beginning is quoted.
3. WELT direct interview, 1997 - Strong direct interview on long holding capacity, supply and demand, inexperienced buyers, and refusal of generic advice.
4. WELT, “Die Zocker haben verloren,” 1995 - Contemporaneous report with reporter-selected quotations on positioning and persistent overvaluation.
5. DER AKTIONÄR December 1996 interview, reproduced facsimile - Later reproduction of a direct Q&A on liquidity, forecasts, reversibility, and equities.
6. WELT/dpa euro report, 1997 - Contemporaneous attributed statement, with Kostolany and Heller wording kept separate.
7. Berliner Zeitung direct interview, 1997 - Direct Q&A on forecast uncertainty, 1929, partial selling, reversals, and long horizons.
8. WELT authorized serialization, “Geld + Psychologie = Tendenz,” 2000 - Posthumous final-book text used for the compact liquidity-and-psychology equation.
9. WELT authorized serialization, “Geschäft mit kleinen Tänzerinnen,” 2000 - Same underlying final book; supports the three-hundred-metres horizon metaphor.
10. WELT authorized serialization, “Von Börsenspielern und Spekulanten,” 2000 - Same underlying final book; supports the computer/programmer line and participant taxonomy.
11. WELT authorized serialization, “Der ewige Wettstreit,” 2000 - Same underlying final book; indexed for its economy/market and supply/demand sections, not treated as an independent work.
12. WELT authorized serialization, “Nur die Hartgesottenen,” 2000 - Same underlying final book; indexed for holder structure, four Gs, and the cycle.
13. WELT authorized serialization, “Spekulanten brauchen Handwerkszeug,” 2000 - Same underlying final book; indexed for information discipline and fait accompli.
14. Authorized sample of Kostolanys Wunderland von Geld und Börse - Publisher states that the underlying 1982 text remains unmodernized; anchors exact identity and suitability rhetoric.
15. Authorized preview of Geld, das große Abenteuer - Substantial preview of the 1972 work, used for knowledge, interpretation, and “mental gymnastics.”
16. DIE ZEIT bylined article, “Der Fiskus als Spekulations-Partner,” 1961 - Genuine early writing on sovereign bonds, analyzability, tax, and uncertainty.
17. DIE ZEIT bylined article, “Das tragische Ende des Herrn Ivar Kreuger,” 1961 - First-person market-history narrative and bearish-position testimony without account evidence.
18. HP-Magazin archival scan, 1991 - Contemporaneous reprint of one Capital column on czarist bonds; not a complete column archive.
19. WELT profile, “Der Traum vom mühelosen Reichtum,” 1996 - Reporter-preserved first-person reflections on America, age, exile, music, and money.
20. WELT excerpt, “Über den Tod,” 1999 - Excerpt from the 1996 Gross/Kostolany conversation; useful for self-conception, with joint editorial provenance retained.
21. EconBiz record for Weisheit eines Spekulanten - Institutional metadata confirming the 1996 conversation format, participants, publisher, and edition.
22. WELT obituary/profile, “Das Leben — eine Spekulation,” 1999 - Contemporaneous reception and short attributed remarks; weaker than a transcript.
23. WELT memorial, “Das Vermächtnis des André Kostolany,” 1999 - Reports the advertisement line and Neuer-Markt description while also illustrating aphorism migration.
24. German Digital Library Karlsruhe lecture record, 1986 - Confirms a public lecture and book signing; supplies no transcript.
25. ZDF “Zeugen des Jahrhunderts” series archive - Institutional series lead for the 1994 Gross/Kostolany episode; no episode transcript was located.
26. NDR Talk archive - Institutional archive lead for his 1998 appearance; no official transcript or captions were located.
27. Licensed Hungarian-edition preview and foreword - Licensed-editor claim for 414 Capital appearances and the posthumous final-book chronology; not an issue-ledger audit.
28. Kalliope portal - Catalog searched for a public personal-papers or letter archive; the bounded negative result is not proof of nonexistence.
29. German Copyright Act §64 - Official ordinary life-plus-70 term rule.
30. German Copyright Act §65 - Official joint-work term provision, relevant to collaborative works.
31. German Copyright Act §3 - Official protection for translations and other adaptations.
32. BnF record for Si la Bourse m’était contée - Institutional record preserving the French work and Françoise Roussel collaboration.
33. LEO-BW German catalog record - Catalog evidence for Roussel’s collaboration and Margaret Carroux’s German translation.

Evidence and provenance limits

• The 35 quotations come from 17 underlying works or contemporaneous reports; each quotation and each source aggregate is at or below 25 words.
• The six WELT installments are one posthumously serialized final book, not six independent works or interviews. The manuscript-to-publication editing chain is not fully public.
• No public recurring shareholder/fund-letter series, complete Capital issue index, personal-papers archive, complete lecture archive, or Kostolany podcast corpus was located.
• The popular sleeping-pill wording, dog/master image, streetcar line, “anything is possible” line, and several inherited market proverbs were excluded or qualified because an accessible contemporary exact-wording source was absent or origination belonged elsewhere.
• Quotes from profiles and memorials are reporter-selected attributions, not verbatim transcripts. The 1996 Gross conversation is an edited joint product, and the 1996 DER AKTIONÄR interview is accessed through a later facsimile.
• Copyright remains active. The chapter quotes sparingly, paraphrases context, preserves collaboration and translation rights, and keeps consecutive fragments within the 25-word underlying-work cap.