This paper examines the optimal consumption and investment problem for a "large" investor, whose portfolio choices affect the instantaneous expected returns on the traded assets.

This paper examines the agency conflict between mutual fund investors and mutual fund companies. Investors would like the fund company to use its judgment to maximize risk-adjusted fund returns. A fund company, however, in its desire to maximize its value as a concern has an incentive to take...

This paper prepared for the Handbook of Statistics (Vol.14: "Statistical Methods in Finance"), surveys the subject of stochastic volatility. The following subjects are covered: volatility in financial markets (instantaneous volatility of asset returns, implied volatilities in option prices and...

The market value of corporate stock in the United States increased by nearly one trillion dollars between December 1994 and July 1995. This paper explores the distribution of the stock ownership, and hence the gains from the stock price rise, and what the rise in stock prices implies for...

This paper examines the cross section of options implied volatility and corporate bond returns. We document a strong predictive ability of corporate bond returns using changes in call and put options implied volatility. Specifically, a strategy of buying (selling) the portfolio with lowest...

We measure investors' short- and long-term stock-return expectations using both options and survey data. These expectations at different horizons reveal what investors think their own short-term expectations will be in the future, or forward return expectations. While contemporaneous short-term...

Classical quantitative finance models such as the Geometric Brownian Motion or its later extensions such as local or stochastic volatility models do not make sense when seen from a physics-based perspective, as they are all equivalent to a negative mass oscillator with a noise. This paper...