Theory in Admati and Pfleiderer (1988) predicts that informed traders will concentrate their trading at the beginning and end of the trading day when markets are thick. Motivated by these predictions, we examine the trading behavior of informed short sellers during the intraday period. While our...

After seventy years with no changes to short sale regulation, the United States Securities and Exchange Commission intervened three times with regulatory action from July 2007 through October 2008. The Commission first loosened restrictions on short sales by repealing the “Uptick Rule” in...

In the literature short sellers are often considered to be informed investors. By accessing a data set of disclosed large European short selling positions with the data of the increase and decrease of positions I model the returns of the short sellers. I find no significant alpha returns in...