When a portion of a bond issue is redeemed, a related proportion of the unamortized premium or discount must be written off.

Bond Issue

The process by which a company or government raises funds by selling bonds to investors.

Unamortized Premium

The portion of a bond premium that has not yet been amortized or gradually written off as an expense over the bond's life.

Redeemed

The act of repurchasing or paying off a security such as a bond or preferred stock at its maturity or before.