John Dorfman: This investing strategy has doubled S&P 500's returns over 21 years
Over the past 21 years, my Robot Portfolio, a naive stock-picking paradigm, has more than doubled the return on the Standard & Poor’s 500 Index, the gauge most professionals use to track the performance of the U.S. stock market. The cumulative returns: 1034% for the Robot, 379% for the S&P...