Harrison Hong (Stanford Business School,) Terence Lim (Goldman Sachs,) Jeremy C. Stein (MIT Sloan School of Management and the National Bureau of Economic Research)
Abstract
Various theories have been proposed to explain momentum in stock returns. We test the gradual-information-diffusion model of Hong and Stein (1999) and establish three key results. First, once one moves past the very smallest stocks, the profitability of momentum strategies declines sharply with firm size. Second, holding size fixed, momentum strategies work better among stocks with low analyst coverage. Finally, the effect of analyst coverage is greater for stocks that are past losers than for past winners. These findings are consistent with the hypothesis that firm-specific information, especially negative information, diffuses only gradually across the investing public. Copyright The American Finance Association 2000.
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Hou, Kewei & Peng, Lin & Xiong, Wei, 2006.
"R2 and Price Inefficiency,"
Working Paper Series
2006-23, Ohio State University, Charles A. Dice Center for Research in Financial Economics.
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