In the year ended June 30, 85 percent of large-cap stock funds, 88 percent of mid-cap funds and 89 percent of small-cap funds failed to match the major stock indexes they track: S&P 500 Index, the S&P Midcap 400 Index and the S&P Smallcap 600 Index. The numbers for five and 10 years were slightly worse.
Mutual funds with an international tilt fared somewhat better. Over the past year, 75 percent of global funds, 55 percent of international funds and 42 percent of emerging market funds failed to match indexes. Over 10 years roughly 80 percent of the funds trailed indexes.