Market Frictions, Investor Sophistication, and Persistence in Mutual Fund Performance

We extend the model of Berk and Green (2004) to investigate the impact of two frictions, search costs and fi nancial constraints, on mutual fund performance. Our model predicts the survival of underperforming funds and delivers two new predictions: 1) differences in performance across funds are likely to persist; and 2) mutual funds targeted to less sophisticated investors should exhibit higher dispersion in expected performance. Using data on U.S. domestic diversi fied equity mutual funds we find empirical support for these predictions