We have believed for many years that investors will be much better off bowing to the wisdom of the market and investing in low-cost, broad-based index funds, which simply buy and hold all the stocks in the market as a whole. As more and more evidence accumulates, we have become more convinced than ever of the effectiveness of index funds. Over 10-year periods, broad stock market index funds have regularly outperformed two-thirds or more of the actively managed mutual funds.