This paper presents an information-theoretic, infinite horizon model of the equity issue decision. The model predicts that (a) equity issues on average are preceded by an abnormal positive return on the stock, although for some firms the issue is preceded by a loss; (b) equity issues on average are preceded by an abnormal rise in the market; and (c) the stock price drops at the announcement of an issue. The model provides a measure of the welfare cost of asymmetric information; the welfare loss may be small even if the price drop at issue announcement is large.

This paper presents an information-theoretic, infinite-horizon model of the equity issue decision. The model predicts that equity issues on average are preceded by an abnormal positive return on the stock, although for some firms the issue is preceded by a loss; equity issues on average are preceded by an abnormal rise in the market; and the stock price drops at the announcement of an issue. The model provides a measure of the welfare cost of asymmetric information; the welfare loss may be small even if the price drop at issue announcement is large.

This paper presents an information‐theoretic, infinite horizon model of the equity issue decision. The model predicts that (a) equity issues on average are preceded by an abnormal positive return on the stock, although for some firms the issue is preceded by a loss; (b) equity issues on average are preceded by an abnormal rise in the market; and (c) the stock price drops at the announcement of an issue. The model provides a measure of the welfare cost of asymmetric information; the welfare loss may be small even if the price drop at issue announcement is large.

This paper uses an option valuation model of the firm to answer the question, “What magnitude tax advantage to debt is consistent with the range of observed corporate debt ratios?” We incorporate into the model differential personal tax rates on capital gains and ordinary income. We conclude that variations in the magnitude of bankruptcy costs across firms can not by itself account for the simultaneous existence of levered and unlevered firms. When it is possible for the value of the underlying assets to jump discretely to zero, differences across firms in the probability of this jump can account for the simultaneous existence of levered and unlevered firms. Moreover, if the tax advantage to debt is small, the annual rate of return advantage offered by optimal leverage may be so small as to make the firm indifferent about debt policy over a wide range of debt‐to‐firm value ratios.

This paper uses an option valuation model of the firm to answer the question, "What magnitude tax advantage to debt s consistent with the range of observed corporate debt ratios?"We incorporate into the model differential personal tax rates on capital gains and ordinary income.We conclude that variations in the magnitude of bankruptcy costs across firms can not by itself account for the simultaneous existence of levered and unlevered firms.When it is possible for the value of the underlying assets to junip discretely to zero, differences across firms in the probability of this jump can account for the simultaneous existence of levered and unlevered firms.Moreover, if the tax advantage to debt is small, the annual rate of return advantage offered by optimal leverage may be so small as to make the firm indifferent about debt policy over a wide range of debt-to-firm value ratios.