# Richer, Wiser, Happier **William Green**  --- _The greatest investors profit from the misperceptions of people who think less rigorously. The edge is temperament, not information._ Green spent decades interviewing Howard Marks, Charlie Munger, Mohnish Pabrai, Nick Sleep, and a dozen others. What emerges isn't a stock-picking methodology. It's a portrait of how to think clearly in domains where the crowd is reliably wrong and patience is systematically punished. The willingness to be lonely. The capacity to defy conventional opinion and follow a peculiar path for years without external validation. --- **Nick Sleep and Qais Zakaria developed what may be the most useful business model insight in the book.** Most companies capture scale economies for themselves: costs fall, margins rise, shareholders benefit. A few share those savings with customers instead, creating a flywheel. Lower prices attract more customers, which generates more scale, which enables further price reductions. Costco is the canonical example. Amazon operates the same way. The key insight is that generosity, structured correctly, can be a source of durable competitive advantage, not a sacrifice of it. Their analytical method followed from this: they asked what the intended destination for a business was in ten or twenty years, then worked backwards to judge whether management's current decisions were raising or lowering the probability of arriving there. Is the company strengthening customer relationships? Is capital allocated rationally? Is there any shortsighted behaviour that could jeopardise eventual greatness? The destination matters more than quarterly checkpoints. --- **Munger's approach to problems, borrowed from Carl Jacobi: invert, always invert.** If someone asks how to help a business, ask instead what would guarantee its ruin, then avoid those things. Munger gave students prescriptions for guaranteed misery: be unreliable, avoid compromise, harbour resentments, stay down when struck by reverses. Don't do these things and you're ahead of most people. Applied to investing, the negative checklist is often more valuable than the positive one. Don't pay too much. Don't invest in businesses prone to obsolescence. Don't invest with crooks and idiots. Don't invest in things you don't understand. --- **The only way to beat the market is to diverge from it.** This favours people with a rare capacity to defy conventional opinion, who care more about being right than gaining social acceptance. Pabrai's secret isn't finding complex opportunities: it's avoiding them. Stay within your circle of competence. Make a small number of mispriced bets with minimal downside and significant upside. Genuine [[Confidence]] means knowing your hit rate, and assuming you'll be right no more than two-thirds of the time. Investing is mostly waiting. Howard Marks: "Our performance doesn't come from what we buy or sell. It comes from what we hold. So the main activity is holding, not buying and selling." The advantage comes from moving consistently against short-termism. When you look at mistakes in life, private and professional, it's almost always because you reached for some short-term fix or high. --- **Size positions by risk, not expected return.** The [[Variance]] that matters is downside variance. Greenblatt: "I don't buy more of the ones I can make the most money on. I buy more of the ones that I can't lose money on." Before every investment, Gundlach asks: "If I assume that I'm wrong on this, what's the consequence going to be?" Make your mistakes nonfatal. The best strategy is the one you can stick with when things go wrong. For most people, that isn't the one with the highest expected return. It's a good strategy that doesn't cause you to abandon ship at the worst moment. ---