An interest-rate swap in which one of the counterparties agrees to pay interest calculated on the basis of a fixed rate while the other counterparty agrees to pay interest based on a floating rate index such as LIBOR.
(1) The coupon swap is considered to be a plain vanilla swap.
(2) Other terms such as fixed-floating interest rate swap, fixed-for-floating interest rate swap, fixed-to-variable rate swap, floating-to-fixed rate swap and variable-to-fixed rate swap are sometimes used to designate a coupon swap.