This book looks at investors who have been known for making huge bets, concentrating a large portion of their capital on a handful of stocks. The investors covered are mostly bottom-up value investors, with the most famous being Warren Buffett and Charlie Munger. You will not read in this book about George Soro’s billion dollar bet against the Pound or Bill Ackman’s shorting of Herbalife. You will read an introduction of each investor and how they came about being concentrated investors, some of their investments and the story behind those ideas.
The investors featured in the book share common traits. In fact, four of the investors featured know each other and their stock purchases are similar. They use a bottom-up approach to investing, only buying stock of companies that they truly understand. Charlie Munger mentions that it is not possible for one to be able to fully understand a few hundred stocks. You only need to understand a handful of companies and keep working on your number one idea instead of your number twentieth idea. These investors also are willing to hold the equities purchased for the long term, at least for a few years.
The interesting part about these investors is that they did not start out looking at high quality companies going at fair prices. Buffett and Munger started out as Benjamin Graham style investors, looking for companies that were selling below book value. Buffett now frequently cites See’s Candies as the perfect business, but he was apprehensive about paying three times book value for the company when See’s was available for sale in the 1970s. John Maynard Keynes, the famous economist, was initially a trader of currencies and commodities. He believed his superior knowledge of macroeconomics would benefit his trading. However, the Great Depression wiped him out when the panic caused the prices of everything to fall, negating the hedges he made in his long/short portfolio.
Besides value investors, a few other investors are featured, such as Edward Thorpe, who made money from arbitrage, and Kirsten Siem, an industrialist in the oil and gas industry.
The shortcomings of this book is the repetition of various quotes and passages, especially in the closing chapter. Also some parts of the book reference academic studies, which are dry and overly focused on details. The chapter on Buffett includes a theoretical backtest involving book value. Buffett has never advocated purchasing stocks using solely book value.
Overall, you get to understand the rationale behind being concentrated in your investments. The investors featured have the track record to prove it and many quotes they made are cited in full here, letting you read their ideas in their own words. Concentrated investing goes against the diversification maxim sprouted by many money managers. However, if you are a passive investor who is not interested about the stock market, you should go for maximum diversification by buying an index tracker where you follow the market.