Article Abstract:
This paper re-examines Kim, McConnell, and Greenwood's (1977) study of captive finance subsidiaries. We suggest that, as long as firms are concerned with reputation, shareholders will find it costly to engage in deliberate wealth expropriation and thus have no incentives to do so. Using a sample of fourteen firms with publicly traded debt, we compute and test the statistical significance of abnormal returns to shareholders, bondholders, and the firm when captives are incorporated. We find that shareholders gain 14.9 percent, bondholders lose 2.3 percent, and firm value increases a significant 10.4 percent. Our results are inconsistent with wealth expropriation and lend support to the importance of reputation to firms. (Reprinted by permission of the publisher.)
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Article Abstract:
This paper examines the "term structure" of options' implied volatilities, using data on S&P 100 index options. Because implied volatility is strongly mean reverting, the implied volatility on a longer maturity option should move by less than one percent in response to a one percent move in the implied volatility of a shorter maturity option. Empirically, this elasticity turns out to be larger than suggested by rational expectations theory - long-maturity options tend to "overreact" to changes in the implied volatility of short-term maturity options. (Reprinted by permission of the publisher.)
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Article Abstract:
The author presents a rapidly convergent algorithm to solve the general portfolio problem of maximizing concave utility functions subject to linear constraints. The algorithm is based on an iterative use of the the Markowitz critical line method for solving quadratic programs. A simple example, taken from the theory of state-contingent claims, is worked out in detail. For technical convergence results, the reader is referred to the appropriate mathematical programming literature. (Reprinted by permission of the publisher.)
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