Why do firms issue convertible debt?

This paper updates several widely cited studies on the motivation for convertible debt issuance. Our recent survey finds that firms use convertibles primarily as an alternative to straight debt, employing a conversion feature to buy down the coupon rate and thus preserve cash flow. The results confirm a decreasing reliance on convertibles as delayed equity financing. Cumulative abnormal returns are related to managers' estimates of the degree of equity underpricing, and to the degree of potential equity dilution associated with the convertible issue. Early evidence is also provided on managers' views of the recent regulatory innovation, Rule 144A.