Episode Summary
Executive Summary: William Green and hedge fund manager Guy Spier reflect on their unusually deep collaborative relationship, using it to explore truth-telling, the emotional reality of investing, and the discipline of compounding without catastrophe. Spier explains how regulation, self-knowledge, and restraint help him survive and grow capital over decades.
Main Topics: Truth, trust, and the deep collaboration behind Spier’s memoir and letters (Priority: 5/5): The conversation opens with the intimate, exhaustive process of editing Spier’s book and annual letters, emphasizing honesty, psychological depth, and the trust required for truthful self-examination. Investing under stress: theory vs. lived reality (Priority: 5/5): Green argues that investing principles are easy in hindsight, but real decisions happen amid fear, chaos, and uncertainty. Spier agrees that the hard part is choosing whether to act or do nothing. Emotional nuance in great investing (Priority: 5/5): The speakers challenge the simplistic idea that great investors are unemotional. They describe a spectrum of micro-reactions, with decision quality depending on context, position size, controversy, and prior gains. Compounding without catastrophe as the real goal (Priority: 5/5): Spier reframes success as survival plus durable compounding rather than maximum annual returns. The goal is to avoid ruin across many possible futures, even if that lowers headline performance. The role of family, leadership, and crisis behavior (Priority: 4/5): Spier recounts how his father responded to the Bear Stearns crisis by giving him psychological support and authority rather than panic, illustrating nuanced leadership and trust under pressure. Regulation, constraints, and better decision-making (Priority: 4/5): Swiss regulatory oversight forces written pre-trade justifications and creates a circuit-breaker against impulsive moves. Spier sees constraints as useful guardrails that improve governance and reduce mindless activity. The value of slow-moving portfolios and fewer decisions (Priority: 4/5): Spier says his best results often come from doing less, questioning whether inactivity is wisdom or fear. The evidence, he says, suggests that meddling reduces returns.
Key Arguments: Truthful self-reporting improves both writing and investing because it creates stronger relationships and more accurate self-knowledge. Great investors are not simply emotional or unemotional; they make subtle, context-dependent decisions and must understand their own internal wiring. The highest priority in investing is not maximizing returns but surviving many possible futures without permanent damage. Doing nothing is often the correct response, but only if it comes from disciplined judgment rather than fear or laziness. Constraints, such as regulation or formal decision records, can improve performance by slowing impulsive behavior and clarifying motives. Family capital changes incentives: having more skin in the game makes capital preservation and long-term thinking essential. A portfolio should be constructed so it works acceptably across multiple world states, not only in the most favorable scenario. Poor diversification or excessive leverage can create attractive upside in one scenario but unacceptable blow-up risk overall. The best analogy for investing is survival across many races, not maximizing speed in a single race. Long-term compounding at a modest rate can be far more meaningful than chasing aggressive returns that risk total failure.
Data Points: Aquamarine Fund total return by end of Feb 2024: 932% - William Green cites the fund’s long-term track record since launch in 1997. Outperformance vs. S&P 500: +157 percentage points - Cumulative outperformance over roughly 26 years. Outperformance vs. MSCI World Index: +396 percentage points - Cumulative outperformance over roughly 26 years. Annualized return of Aquamarine Fund: about 9% - Green later says the fund averaged exactly 9% a year through the end of 2023. Annualized return of S&P 500: 8.3% - Comparison point for the fund’s long-term compounding discussion. Annualized return of MSCI World Index: 7.1% - Comparison point for the fund’s long-term compounding discussion. Value of $1 million invested at launch: about $9.4 million to $10 million+ - Illustrates the power of compounding over 26+ years. Launch year of Aquamarine Fund: 1997 - The fund began in September 1997. Family ownership in the fund: over 40% - Spier says a large share of the fund belongs to his family, increasing his personal skin in the game. Initial fund size: about $20 million - Green notes the fund started small, with most capital from Spier’s father. Father’s initial investment: $14 million - Used to explain Spier’s early capital base and risk aversion. Initial stock allocation example: about $250,000 into Duff & Phelps - Spier cites this as an early decision; he says it later became a 7x winner. Portfolio decision threshold: 80/20 rather than 51/49 - Spier says he wants enormous clarity before making portfolio changes. Regulatory trade documentation: written pre-trade check / recorded justification - Swiss regulation requires a documented rationale before trades, acting as a circuit breaker. Bankruptcy in portfolio: 2015 - Spier references a portfolio bankruptcy caused by a bad 10% allocation decision. Example of a position size change: 4% intended purchase reduced to 2% - A regulatory review led him to reconsider selling small positions and shrink the planned trade.
Pivotal Quotes: "I care if this book ruins my reputation, I just want to give an honest accounting of myself." — Guy Spier: Explaining why he wanted the memoir to be truthful even if it made him look bad. "We're bleeding from every orifice." — Guy Spier: His description of the financial crisis as remembered by William Green, showing the panic of the moment. "The skier that wins the race is not the fastest skier, it's the fastest skier that doesn't get injured." — William Green: Used as an analogy for investing, emphasizing survival over raw speed.
Implications: Listeners are urged to prioritize survival, truth, and self-knowledge over bravado. For investors, the lesson is to build systems that prevent catastrophe, support discipline, and allow compounding across decades.
About We Study Billionaires
We interview and study famous financial billionaires, including Warren Buffett, Ray Dalio, and Howard Marks, and teach you what we learn and how you can apply their investment strategies in the stock market. We Study Billionaires is the largest stock investing podcast show in the world with 180,000,000+ downloads and is hosted by Stig Brodersen, Preston Pysh, William Green, Clay Finck, and Kyle Grieve. This podcast also includes the Richer Wiser Happier series hosted by best-selling author Wi...