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Short Selling and the Price Discovery Process

Ekkehart Boehmer

出版	SSRN, 2012
URL	http://books.google.com.hk/books?id=I2XQzgEACAAJ&hl=&source=gbs_api

註釋

We show that stock prices are more accurate when short sellers are more active. First, in a large panel of NYSE-listed stocks, intraday informational efficiency of prices improves with greater shorting flow. Second, at monthly and annual horizons, more shorting flow accelerates the incorporation of public information into prices. Third, greater shorting flow reduces post-earnings announcement drift for negative earnings surprises. Fourth, short sellers change their trading around extreme return events in a way that aids price discovery and reduces divergence from fundamental values. These results are robust to various econometric specifications and their magnitude is economically meaningful.