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Bad News Travels Slowly: Size, Analyst Coverage and the Profitability of Momentum Strategies

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  • Harrison Hong
  • Terence Lim
  • Jeremy C. Stein

Abstract

A number of theories have been proposed to explain the medium-term momentum in stock returns identified by Jegadeesh and Titman (1993). We test one such theory--based on the gradual-information-diffusion model of Hong and Stein (1997)--and establish three key results. First, once one moves past the very smallest stocks (where thin market-making capacity appears to be an issue) the profitability of momentum strategies declines sharply with firm size. Second, holding size fixed, momentum strategies work particularly well among stocks which have low analyst coverage. Finally, there is a strong asymmetry: the effect of analyst coverage is much more pronounced for stocks that are past losers than for stocks that are past winners. These findings are consistent with the hypothesis that firm-specific information only gradually across the investing public.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 6553.

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Date of creation: May 1998
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Publication status: published as Hong, Harrison, Terence Lim and Jeremy C. Stein. "Bad News Travels Slowly: Size, Analyst Coverage, And The Profitability Of Momentum Strategies," Journal of Finance, 2000, v55(1,Feb), 265-295.
Handle: RePEc:nbr:nberwo:6553

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  1. Momentum Redux
    by quantivity in Quantivity on 2011-06-19 04:14:45
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