The paper tests the null hypothesis of ex ante purchasing power parity. The empirical evidence obtained is inconsistent with the null for major industrialized countries over the current floating exchange rate regime. Expected nominal exchange rate changes appear to deviate systematically from expected inflation rate differentials over the same holding period even though real exchange rate changes appear to be serially uncorrelated. This supports the presence of time-varying risk premia in foreign exchange markets and real determinants of exchange rate movements as suggested by equilibrium theories of international asset markets.

The paper tests the null hypothesis of ex ante purchasing power parity. The empirical evidence obtained is inconsistent with the null for major industrialized countries over the current floating exchange rate regime. Expected nominal exchange rate changes appear to deviate systematically from expected inflation rate differentials over the same holding period even though real exchange rate changes appear to be serially uncorrelated. This supports the presence of time‐varying risk premia in foreign exchange markets and real determinants of exchange rate movements as suggested by equilibrium theories of international asset markets.

This paper investigates the month‐by‐month stability of (a) daily returns and correlation coefficients of stock returns, (b) correlation and covariance matrices, (c) number of return‐generating factors, and (d) the APT pricing relationship. The results show that there is a January effect and a small‐firm effect in stock returns. Correlation matrices are more stable than covariance matrices, but both types of matrices are not stable across months and across the sample groups. The number of return‐generating factors is rather stable most of the time and for most of the sample groups, but there is some significant instability that is related to the average correlation coefficients among stocks. The APT pricing relationship does not seem to be supported by the two‐stage process using the maximum‐likelihood factor analysis.

This paper investigates the month-by-month stability of (a) daily returns and correlation coefficients of stock returns, (b) correlation and covariance matrices, (c) number of return-generating factors, and (d) the APT pricing relationship. The results show that there is a January effect and a small-firm effect in stock returns. Correlation matrices are more stable than covariance matrices, but both types of matrices are not stable across months and across the sample groups. The number of return-generating factors is rather stable most of the time and for most of the sample groups, but there is some significant instability that is related to the average correlation coefficients among stocks. The APT pricing relationship does not seem to be supported by the two-stage process using the maximum-likelihood factor analysis.

A firm must issue common stock in order to undertake a new investment, and the firm's manager‐owners can value the firm more accurately than the market. The ability of the manager‐owners to trade in the firm's shares during the issue (a) reduces the investments that are foregone because of the market's mispricing the firm's shares, (b) changes the size and direction of the stock price change when the firm announces a new stock issue, and (c) changes the market value of the firm before and after the issue announcement, whether or not it decides to issue.

This paper models a competitive financial market economy in which there are forward markets as well as stock and bond markets. Although there are separation theorems in the stock and forward markets literatures, this analysis shows that neither separation theorem survives in this integrated financial market economy. Next, the analysis shows that the separation results hold and are equivalent if the manager has an appropriate compensation package. Then the model is modified to allow for depreciation charges and tax credits. A positive theory of hedging is developed that shows that the corporation can preserve deductions and credits by hedging and so increase corporate value.