How Bonds Work

A bond’s principal, or face value, represents the amount of the original loan that is to be repaid on the bond’s maturity date. The interest that the issuer agrees to pay each year is known as the coupon, a term derived from the obsolete practice of attaching coupons that could be redeemed for interest payments to the bottom of the bond certificate. The interest rate, or coupon rate, multiplied by the principal of the bond provides the dollar amount of the coupon. For example, a bond with an 8 percent coupon rate and a principal of $1000 will pay annual interest of $80. In the United States the usual practice is for the issuer to pay the coupon in two semiannual installments. (1)