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How Active is Your Fund Manager? A New Measure That Predicts Performance
Martijn Cremers Yale School of Management Antti Petajisto Yale School of Management March 31, 2009 AFA 2007 Chicago Meetings Paper EFA 2007 Ljubljana Meetings Paper Yale ICF Working Paper No. 06-14 Abstract: We introduce a new measure of active portfolio management, Active Share, which represents the share of portfolio holdings that differ from the benchmark index holdings. We compute Active Share for domestic equity mutual funds from 1980 to 2003. We relate Active Share to fund characteristics such as size, expenses, and turnover in the cross-section, and we also examine its evolution over time. Active Share predicts fund performance: funds with the highest Active Share significantly outperform their benchmarks, both before and after expenses, and they exhibit strong performance persistence. Non-index funds with the lowest Active Share underperform their benchmarks.
Keywords: Portfolio management, Active Share, tracking error, closet indexing JEL Classifications: G10, G14, G20, G23 Working Paper SeriesDate posted: March 21, 2006 ; Last revised: May 07, 2009Suggested CitationContact Information
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