The investor composition in the US stock market has been undergoing a dramatic shift towards greater institutional ownership. In this paper, we show that the increase in the stock ownership by institutions over time, especially those with focus on short-term performance, is positively related to...

This study constructs the institutional- and individual-based probability of informed trading (PIN) by adjusting Easley, Hvidkjaer and O'Hara (2002) and investigates the impact of the informed trading behaviors of institutions and individuals on the post-announcement drift around the earnings...