The Impact of More Frequent Portfolio Disclosure on Mutual Fund Performance

Abstract

This paper analyses the impact of more frequent portfolio disclosure on mutual funds' performance. Since 2004, SEC requires all U.S. mutual funds to disclose their portfolio holdings on a quarterly basis from semi-annual previously. This change in regulation provides a natural setting to study the impact of disclosure frequency on the performance of mutual funds. Prior to the policy change, we find that the semi-annual funds with high abnormal returns in the past year outperform the corresponding quarterly funds by 17-20 basis points a month. This difference in performance disappears after 2004. The reduction in performance is higher for semi-annual funds holding illiquid assets than those holding liquid assets. These results support the hypothesis that performance of funds with more frequent disclosure suffer more from activities such as front running.