The NY Times writes that only 2 out of 2,862 funds consistently outperformed the stock market, noting:
The S.&P. Dow Jones team looked at 2,862 mutual funds that had been operating for at least 12 months as of March 2010. Those funds were all broad, actively managed domestic stock funds. (The study excluded narrowly focused sector funds and leveraged funds that, essentially, used borrowed money to magnify their returns.)
The team selected the 25 percent of funds with the best performance over the 12 months through March 2010. Then the analysts asked how many of those funds — those in the top quarter for the original 12-month period — actually remained in the top quarter for the four succeeding 12-month periods through March 2014.
The answer was a vanishingly small number: Just 0.07 percent of the initial 2,862 funds managed to achieve top-quartile performance for those five successive years. If you do the math, that works out to just two funds. Put another way, 99.93 percent, or 2,860 of the 2,862 funds, failed the test.