This paper examines optimal hedging behavior in a market where preferences for current consumption are partly determined by the consumer's past consumption history. The model considers an individual exposed to price risk, who allocates wealth between consumption and futures contracts over a (continuous-time) finite planning horizon. The speculative component of the hedge ratio is shown to be smaller and the consumption path smoother than in models where preferences are separable over time. Some comparative-static properties of the hedge ratio are also examined.
ABSTRACT We use predictions of aggregate stock return variances from daily data to estimate time‐varying monthly variances for size‐ranked portfolios. We propose and estimate a single factor model of heteroskedasticity for portfolio returns. This model implies time‐varying betas. Implications of heteroskedasticity and time‐varying betas for tests of the capital asset pricing model (CAPM) are then documented. Accounting for heteroskedasticity increases the evidence that risk‐adjusted returns are related to firm size. We also estimate a constant correlation model. Portfolio volatilities predicted by this model are similar to those predicted by more complex multivariate generalized‐autoregressive‐conditional‐heteroskedasticity (GARCH) procedures.
Cornell and Reinganum (1981), hereafter CR, report that price differentials for future contracts and forward contracts are statistically insignificant in foreign exchange markets. Based on this finding, CR conclude that marking-to-market is insignificant in the formulation of currency futures prices. This note identifies two potential concerns with the CR tests. One problem relates to the timing of delivery dates for “matched” contracts. A second problem relates to the time period for the CR study. We show that correcting for these problems does not affect the overall conclusions of the CR study; marking-to-market does not appear to have a significant effect on currency futures prices.
This study examines the impact on shareholder wealth of changes in interstate banking laws. The research demonstrates that changes in state statutes which allow interstate banking have a positive impact on the stock prices of regional banking organizations and a negative impact on the stock prices of money center banks. Interstate banking statutes initially exclude those states in which the money center banks are headquartered. The findings provide evidence that, by excluding money center banks from expansion across state lines, the competition from the regional banks may have an adverse competitive effect on the money center banks.
A new empirical method and data set are used to study the effects of tax policy on corporate financing choices. Clear evidence emerges that non-debt tax shields "crowd out" interest deductibility, thus decreasing the desirability of debt issues at the margin. Previous studies which failed to find tax effects examined debt-equity ratios rather than individual, well-specified financing choices. This paper also demonstrates the importance of controlling for confounding effects which other papers ignored. Results on other (asymmetric information) effects on financing decisions are also presented.
Empirical evidence of time varying term premia in bond returns is frequently interpreted as evidence against the Expectations Hypothesis. This paper shows that the Expectations Hypothesis can actually imply time varying term premia if the time frame for which the Expectations Hypothesis holds differs from the return measurement period. Furthermore, many of the properties of these term premia are consistent with those of observed term premia. These results are important because they imply that the case against the Expectations Hypothesis is weaker than claimed in the empirical literature.