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How Active is Your Fund Manager? A New Measure That Predicts Performance

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  • Martijn Cremers
  • Antti Petajisto
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    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.

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    File URL: http://icfpub.som.yale.edu/publications/2370
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    Bibliographic Info

    Paper provided by Yale School of Management in its series Yale School of Management Working Papers with number amz2370.

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    Date of creation: 01 Mar 2006
    Date of revision: 01 May 2009
    Handle: RePEc:ysm:somwrk:amz2370

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    Web page: http://icf.som.yale.edu/
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    Related research

    Keywords: Portfolio management; Active Share; tracking error; closet indexing;

    References

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    1. Luboš Pástor & Robert F. Stambaugh, . "Mutual Fund Performance and Seemingly Unrelated Assets.”," CRSP working papers 527, Center for Research in Security Prices, Graduate School of Business, University of Chicago.
    2. Randolph Cohen & Joshua Coval & Lubos Pastor, 2002. "Judging Fund Managers by the Company They Keep," NBER Working Papers 9359, National Bureau of Economic Research, Inc.
    3. Brown, Stephen J. & Goetzmann, William N., 1997. "Mutual fund styles," Journal of Financial Economics, Elsevier, vol. 43(3), pages 373-399, March.
    4. William Goetzmann & Zoran Ivkovich & K. Rouwenhorst, 2000. "Day Trading International Mutual Funds: Evidence And Policy Solutions," Yale School of Management Working Papers ysm138, Yale School of Management, revised 01 Jun 2001.
    5. Mark Grinblatt & Sheridan Titman, . "Mutual Fund Performance: An Analysis of Quarterly Portfolio Holdings," Rodney L. White Center for Financial Research Working Papers 23-88, Wharton School Rodney L. White Center for Financial Research.
    6. William N. Goetzmann & Stephen J. Brown, 2005. "Performance Persistence," Yale School of Management Working Papers ysm451, Yale School of Management.
    7. Daniel, Kent, et al, 1997. " Measuring Mutual Fund Performance with Characteristic-Based Benchmarks," Journal of Finance, American Finance Association, vol. 52(3), pages 1035-58, July.
    8. Matthew Spiegel & Harry Mamaysky & Hong Zhang, 2005. "Improved Forecasting of Mutual Fund Alphas and Betas," Yale School of Management Working Papers amz2361, Yale School of Management, revised 01 Mar 2006.
    9. Fama, Eugene F, 1972. "Components of Investment Performance," Journal of Finance, American Finance Association, vol. 27(3), pages 551-67, June.
    10. Jonathan B. Berk & Richard C. Green, 2002. "Mutual Fund Flows and Performance in Rational Markets," FAME Research Paper Series rp100, International Center for Financial Asset Management and Engineering.
    11. Russ Wermers, 1999. "Mutual Fund Herding and the Impact on Stock Prices," Journal of Finance, American Finance Association, vol. 54(2), pages 581-622, 04.
    12. Joseph Chen & Harrison Hong & Ming Huang & Jeffrey D. Kubik, 2004. "Does Fund Size Erode Mutual Fund Performance? The Role of Liquidity and Organization," American Economic Review, American Economic Association, vol. 94(5), pages 1276-1302, December.
    13. Russ Wermers, 2000. "Mutual Fund Performance: An Empirical Decomposition into Stock-Picking Talent, Style, Transactions Costs, and Expenses," Journal of Finance, American Finance Association, vol. 55(4), pages 1655-1703, 08.
    14. Grinblatt, Mark & Titman, Sheridan, 1993. "Performance Measurement without Benchmarks: An Examination of Mutual Fund Returns," The Journal of Business, University of Chicago Press, vol. 66(1), pages 47-68, January.
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