Most corporate bonds are debentures. The rate of interest a corporation will pay on its bonds is a function of the market's perceived risk of the corporation being unable to repay the debt. Debentures may also be issued by privately held corporations. | Most corporate bonds are debentures. The rate of interest a corporation will pay on its bonds is a function of the market's perceived risk of the corporation being unable to repay the debt. Debentures may also be issued by privately held corporations. |