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Profitability of Momentum Strategies: an Evaluation of Alternative Explanations

38 Pages Posted: 13 Jul 2000 Last revised: 12 Oct 2010

Narasimhan Jegadeesh

Emory University - Department of Finance

Sheridan Titman

University of Texas at Austin - Department of Finance; National Bureau of Economic Research (NBER)

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Date Written: June 1999

Abstract

This paper evaluates various explanations for the profitability of momentum strategies documented in Jegadeesh and Titman (1993). The evidence indicates that momentum profits have continued in the 1990's suggesting that the original results were not a product of data snooping bias. The paper also examines the predictions of recent behavioral models that propose that momentum profits are due to delayed overreactions which are eventually reversed. Our evidence provides support for the behavioral models, but this support should be tempered with caution. Although we find no evidence of significant return reversals in the 2 to 3 years following the following formation date, there are significant return reversals 4 to 5 years after the formation date. Our analysis of post-hiding period returns sharply rejects a claim in the literature that the observed momentum profits can be explained completely by the cross-sectional dispersion in expected returns.

Suggested Citation

Jegadeesh, Narasimhan and Titman, Sheridan, Profitability of Momentum Strategies: an Evaluation of Alternative Explanations (June 1999). NBER Working Paper No. w7159. Available at SSRN: https://ssrn.com/abstract=227349

Narasimhan Jegadeesh (Contact Author)

Emory University - Department of Finance ( email )

Atlanta, GA 30322-2710
United States

Sheridan Titman

University of Texas at Austin - Department of Finance ( email )

Red McCombs School of Business
Austin, TX 78712
United States
512-232-2787 (Phone)
512-471-5073 (Fax)

National Bureau of Economic Research (NBER)

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

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