This article analyzes intraday stock price and trading volume reactions to directors' dealings announcements in Germany and the United Kingdom from January 2007 to June 2010. The main findings show that prompt public disclosure of directors' dealings, as mandated by the EU Transparency...

We show that aggregate insider trading (AIT) in the S&P 500 is a reliable predictor of the U.S. equity premium, while AIT outside the S&P 500 seems to be uninformative. Aggregate trading of S&P 500 insiders outperforms a broad set of well-established predictors considering in- and out-of-sample...