Fixed-rate bonds wherein the issuer holds the right, but not the obligation, to redeem the bond at par value or at a premium during its lifetime. Callable bonds often include a grace period where the issuer cannot call the bond, with conversion possible later if specific conditions are met.
A closed period refers to a span of time, often 10 years following the issuance of a bond, during which the bond cannot be called by the issuer.
Yield to Call (YTC) refers to the yield on a bond or other fixed-income security assuming that the bond will be redeemed by the issuer at the first call date specified in the indenture agreement. YTC is particularly important for callable bonds, as it helps investors gauge the potential return if the bond is called before maturity.
