Specified dates when a bond issuer is required to redeem all or a portion of the outstanding issues of a bond prior to its maturity. The issuer might be required to redeem all or a portion of the bonds according to the call or prepayment provisions of the of the bond contract. 

|||Some types of mandatory redemptions occur either on a scheduled basis, or when a specified amount of money is available in the sinking fund. Bonds may be redeemed at a specified price, usually at par, and the bondholder will receive any accrued interest to the redemption date.