Much financial activity is zero-sum. While providing transactional and diversification services to others, participants also prey upon each other. High-ability predators trade opportunistically with less-able prey. In our dynamic model these features amplify real shocks. The presence of more low-ability traders reduces expected losses to high-ability traders, leading to equilibria with high levels of financial activity and employment. Shocks to profits can motivate exit by low-ability traders, rendering those of intermediate skill more vulnerable. Thus, our relatively simple model generates boom-bust dynamics suggestive of Wall Street. (JEL G00, G20, E44)

This paper models and characterizes investment incentive problems associated with debt financing. The decision problem of residual claimants is explicity formulated and their investment policies are characterized. The paper also analyzes the use of conversion features and warrants to control distortionary incentives. These claims reverse the convex shape of levered equity over the upper range of the firm's earnings, and this mitigates the incentive to take risk. It is shown that, under certain conditions, such claims can be constructed to restore net present value maximizing incentives and simultaneously meet the financing requirements of the firm.

I examine the anomalous behavior of the taxable and tax-exempt yield curves. Long municipal yields appear too high relative to the equivalent after-tax yield that can be earned in Treasury or corporate bonds. I discuss existing explanations of the problem and propose a simple model that relates the yields of taxable bonds to the yield curve for par tax exempts. The ratio of the tax-exempt yield to the taxable yield increases with maturity in the model, so it is consistent with observed phenomena such as inverted yield curves for taxables and contemporaneous rising yield curves for tax exempts. Statistical and descriptive comparisons between the yields predicted.by the model and observed yields on par bonds that the model has some promise in explaining the apparent anomalies in the behaviors of the two yield curves. Article published by Oxford University Press on behalf of the Society for Financial Studies in its journal, The Review of Financial Studies.

[I examine the anomalous behavior of the taxable and tax-exempt yield curves. Long municipal yields appear too high relative to the equivalent after-tax yield that can be earned in Treasury or corporate bonds. I discuss existing explanations of the problem and propose a simple model that relates the yields of taxable bonds to the yield curve for par tax exempts. The ratio of the tax-exempt yield to the taxable yield increases with maturity in the model, so it is consistent with observed phenomena such as inverted yield curves for taxables and contemporaneous rising yield curves for tax exempts. Statistical and descriptive comparisons between the yields predicted by the model and observed yields on par bonds show that the model has some promise in explaining the apparent anomalies in the behaviors of the two yield curves.]

ABSTRACT I model strategic interaction among issuers, underwriters, retail investors, and institutional investors when the secondary market has limited price transparency. Search costs for retail investors lead to price dispersion in the secondary market, while the price for institutional investors is infinitely elastic. Because retail distribution capacity is assumed to be limited for each underwriter‐dealer, Bertrand competition breaks down in the primary market and new issues are underpriced in equilibrium. Syndicates emerge in which underwriters bid symmetrically, with quantities allocated internally to efficiently utilize retail distribution capacity.

ABSTRACT Duality theory is employed to provide necessary and sufficient conditions for portfolios on the minimum‐variance frontier to have positive investment proportions in all assets. These conditions involve the feasibility of portfolios that have non‐negative correlation with all assets and positive correlation with at least one. Using these results, several “qualitative” results concerning the signs of investment proportions in efficient portfolios are proved. It is argued that the conditions that ensure all‐positive weights in efficient portfolios are intuitively compelling and are not unique to the CAPM. With large numbers of assets, however, the signs of weights in minimum‐variance portfolios can be very sensitive to slight departures from these conditions due to, for example, sampling error.

ABSTRACT This paper theoretically evaluates the robustness of the Security Market Line relationship when the market proxy employed is not mean‐variance efficient. The analysis focuses on the behavior of the “benchmark errors,” the deviations of assets and portfolios from the Security Market Line. First, we characterize how the location of an asset in mean‐variance space determines its benchmark error. Then the continuity properties of the benchmark errors are studied. The results indicate that the magnitudes of the errors exhibit continuous but not uniformly continuous behaviors. The relative rankings based on deviations from the Security Market Line, however, exhibit some severe discontinuities. In fact, these can be exactly reversed for two proxies arbitrarily close in mean‐variance space.