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Monthly Measurement of Daily Timers

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  • Goetzmann, William N.
  • Ingersoll, Jonathan
  • Ivković, Zoran

Abstract

This paper addresses the bias associated with parametric measurement of timing skill based on monthly timer returns when timers can make daily timing decisions. Simulations suggest that the classic Henriksson-Merton parametric measure of timing skill is weak and biased downward when applied to the monthly returns of a daily timer. The paper proposes an adjustment that mitigates this problem without the need to collect daily timer returns. Four tests of timing skill, carried out on a sample of 558 mutual funds, show that very few funds exhibit statistically significant timing skill. More encompassing, the adjusted-FF3 test (based on the specification that incorporates both the proposed adjustment and the Fama-French three-factor model) is the least biased measure of timing skill among the four—it provides for a sharper inference regarding timing skill and helps mitigate biases associated with the choice of investment style.

Suggested Citation

  • Goetzmann, William N. & Ingersoll, Jonathan & Ivković, Zoran, 2000. "Monthly Measurement of Daily Timers," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 35(03), pages 257-290, September.
  • Handle: RePEc:cup:jfinqa:v:35:y:2000:i:03:p:257-290_00
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    References listed on IDEAS

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    1. Banz, Rolf W., 1981. "The relationship between return and market value of common stocks," Journal of Financial Economics, Elsevier, vol. 9(1), pages 3-18, March.
    2. Admati, Anat R & Ross, Stephen A, 1985. "Measuring Investment Performance in a Rational Expectations Equilibrium Model," The Journal of Business, University of Chicago Press, vol. 58(1), pages 1-26, January.
    3. Admati, Anat R, et al, 1986. " On Timing and Selectivity," Journal of Finance, American Finance Association, vol. 41(3), pages 715-730, July.
    4. Brown, Stephen J, et al, 1992. "Survivorship Bias in Performance Studies," Review of Financial Studies, Society for Financial Studies, vol. 5(4), pages 553-580.
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