We propose a tractable equilibrium model to examine how margin requirements affectasset prices, market volatility, and market participants' welfare. Weshow that margin requirements can have opposite effects on market volatility whenthey constrain different investors and thus can help explain why...

Market makers in some financial markets often make offsetting trades and have significant market power. We develop a market making model that captures these market features as well as other important characteristics such as information asymmetry and inventory risk. In contrast to the existing...

This paper reviews, synthesizes, and critiques the capital market literature examining trading volume around earnings announcements and other financial reports. Our purposes are to assess what we have learned from examining trading volume around these announcements and to suggest directions for...

This paper examines security design in imperfectly competitive markets in which assets clear separately rather than jointly. Derivatives are generally nonredundant even with zero asset supply. We characterize the scope for introducing nonredundant derivatives and examine the welfare effects of...

In this paper, we attempt to assess the potential importance of different types of traders (i.e., those with public and private information) in financial markets using a specification of the standardized duration. This approach allows us to test unobserved heterogeneity in a nonlinear version...

I test the predictions of a new asset pricing model regarding the interaction of ex-ante return skewness and the dispersion of analysts' earnings forecasts on a sample of U.S. stocks. I present evidence that skewness and forecast dispersion have an interactive pricing impact, that forecast...

I present a new model of how ex-ante skewness affects expected asset prices. The price that supports a given short position in a positively- (negatively-) skewed asset is further from (closer to) expected value than is the price that supports a long position of the same magnitude, even in a...

We study the impact of short-sale constraints on market prices and liquidity in imperfectly competitive markets in which market-makers have market power. We show that, with or without information asymmetry, short-sale constraints decrease bid prices, but increase bid-ask spreads and...

We develop a new asset pricing theory that bridges two seemingly unrelated anomalies: (1) the negative relationship between dispersion in financial analysts’ earnings forecasts and expected returns and (2) the negative relationship between ex-ante skewness and expected returns. The results...