Bond indenture provisions and the risk of corporate debt

This paper examines the effect of alternative bond indenture provisions on the allocation of risk among the firm's claimants. The approach taken here differs from that of earlier studies in that risk allocation is examined while the firm's leverage (in market value terms) is held constant. In this context, four indenture provisions are examined: (1) the time to maturity, (2) the promised payment schedule, (3) financing restrictions and (4) priority rules. It is concluded that risk is transferred from stockholders to bondholders as the time to maturity and promised payment increase appropriately. Furthermore substitution of longer-term debt for an equal amount of shorter-term debt also increases the risk to bondholders while decreasing the risk to stockholders. The analysis shows that a coupon bond can be represented by a unique discount bond with the same risk and value. This permits the characterization of the effective maturity of a risky debt issue, a concept analogous to the stochastic duration of a default-free coupon bond. These results are shown to be independent of the means used to finance the debt issue. Finally, it is concluded that the relative risk associated with different bonds issued by the same firm cannot be determined by the structure of priority rules alone. It is also necessary to consider the timing of the promised payments compared to that of the other debt issues in the firm's capital structure.