Active managers have strong incentives to concurrently realize tax losses and window dress portfolios at the ends of calendar quarters. Consequently, stocks with capital losses experience downward price pressure, and a large share of returns to momentum strategies is earned at these times. This...

Correlations of stock returns change randomly through time. The variations in correlations are themselves correlated across pairs of stocks. In an equilibrium model, investor uncertainty regarding the growth rate of the economy is the factor driving systematic variations in R square, pairwise...

We propose and estimate a model of endogenous informed trading that is a hybrid of the PIN and Kyle models. When an informed trader trades optimally, both returns and order flows are needed to identify information asymmetry parameters. Empirical relationships between parameter estimates and...

We study strategic disclosure timing by correlated firms in the presence of risk-averse investors. Firms delay disclosures in the hope that positively correlated firms will announce especially good news and lift their own price. Risk premia rise before disclosures, drop when disclosures occur,...