This paper hypothesizes that the risk per unit of time and the required rate of return are higher than normal during an event period whose timing can be predicted. Consistent with this hypothesis this paper presents empirical evidence indicating that the unconditional mean rate of return, the variance of stock returns and their systematic risk are higher than ‘usual’ during dividend announcement periods. However, the documented increases in the systematic risk are not large enough to fully explain the ‘excess returns’. This finding is puzzling and hard to reconcile with existing theory.

We examine a sample of 459 firms filing for Chapter 11 during the period 1991–1998 and find that our sample firms experience significant improvements in their operating performance during Chapter 11. Our evidence is consistent with the hypothesis that Chapter 11, if anything, provides net benefits to bankrupt firms. In the cross section, firms with higher debt ratios experience greater improvements in operating performance, and the complexity of the renegotiation process negatively affects the improvement. We find no relationship between Chapter 11 outcome and changes in risk-adjusted firm value in Chapter 11.