Perpetual bond

Perpetual bond, which is also known as a perpetual or just a perp, is a bond with no maturity date. Therefore, it may be treated as equity, not as debt. Issuers pay coupons on perpetual bonds forever, and they do not have to redeem the principal. Perpetual bond cash flows are, therefore, those of a perpetuity.

The Perpetual Bond is a Big Finish Productions audiobook based on the long-running British science fiction television series Doctor Who.