From the New York Times bestselling author of The Little Book that Beats the Market When it comes to investing in the stock market, investors have plenty of options: 1. They can do it themselves. Trillions of dollars are invested this way. (Of course, the only problem here is that most people have no idea how to analyze and choose individual stocks, how to construct a stock portfolio, when to buy and sell, and most have no idea how much to invest in the first place.) 2. They can give money to professionals to invest. Trillions of dollars are invested this way. (Unfortunately, most professionals actually underperform the market averages over time. In fact, it may be even harder to pick good professional managers than it is to pick good individual stocks.