This paper investigates the relations between aggregate trading volume and information on financial markets from a theoretical standpoint. Through numerical examples, it relates some statistics describing equilibrium price and volume--such as the variance of the price and its correlation with...

This paper analyzes the effect on a company's stock price when it is added to the S&P 500 Index. A simple theoretical model is developed to show how trading effects and changes to fundamentals should affect the price of S&P500 additions upon announcement and in the long run. This model predicts...

Can asset price bubbles be detected? This survey of econometric tests of asset price bubbles shows that, despite recent advances, econometric detection of asset price bubbles cannot be achieved with a satisfactory degree of certainty. For each paper that finds evidence of bubbles, there is...

We estimate the cross-sectional relationship between open market repurchases and accounting data for a large sample of dividend- paying and non-dividend paying firms over a twelve year period (1984-95). Consistent with the hypothesis that firms use open market repurchases to reduce the agency...

Using data on corporate profits forecasts from the Survey of Professional Forecasters, I decompose real stock returns into a fundamental news component and a return news component and analyze the effects of the Great Moderation on each. Empirically, the response of each component of real stock...

We estimate the effects of share repurchases and employee stock option exercises on net share retirements for large S&P 500 companies. We find that, over the past five years, gross repurchases have reduced shares outstanding 2 percent annually; but, owing to the exercise of employee stock...

This paper compares the predictions for the market value of firms from the Gordon growth model with those from a dynamic general equilibrium model of production. The predictions for movements in the market value of firms in response to a decline in the required return or an increase in the...