We first document that each trading day the U.S. Treasury notes have a large proportion of zero returns. This is because almost all trades are executed at the best ask or bid quote and quoted spreads are mostly set close to the minimum tick. The proportion of zero returns is negatively...

By constructing high-frequency measures of informed trading and news about technological competition, we provide evidence that the news about a firm's disadvantage in competition leads to informed selling. Such a pattern is weaker among firms in the industries with faster technology obsolescence...

Using intradaily order flows processed via the Lee and Ready (1991) algorithm for NYSE/AMEX-listed stocks over the past 27 years, I estimate a set of price-impact parameters. The results provide strong evidence that price impact is priced in the cross-section of stock returns, even after...

In this study, we employ order imbalance measures to provide evidence that there exists an individual/institutional dichotomy in reactions to seasoned equity offerings (SEOs). The evidence supports the notion that small, possibly naıve, individual investors keep trading SEO stocks...

We develop a model to analyze the effects of hedging activities by options market makers (OMMs) facing informed trading. The model suggests that OMMs׳ hedging activities motivated by adverse-selection risk lead to wider spreads in both stock and options markets. The hedging effect on spreads is...

This study develops an econometric model that incorporates features of price dynamics across assets as well as through time. With the dynamic factors extracted via the Kalman filter, we formulate an asset pricing model, termed the dynamic factor pricing model (DFPM). We then conduct asset...