Swap Rate
The swap rate is the fixed interest rate agreed upon by two parties in an interest rate swap contract, exchanged for a floating rate tied to a benchmark such as SOFR, and represents the market's consensus expectation of the average level of the floating rate over the life of the swap.
In a standard fixed-for-floating interest rate swap, one party agrees to pay a fixed rate — the swap rate — while receiving a floating rate, typically the Secured Overnight Financing Rate (SOFR) or its term equivalents. The counterparty takes the opposite position. No principal changes hands; only the net difference in interest payments is exchanged at each settlement date. The swap rate is set at inception so that the present value of expected fixed-rate payments equals the present value of expected floating-rate payments, making the initial fair value of the contract zero.
Swap rates are closely tied to — but distinct from — Treasury yields. The difference between the swap rate and the Treasury yield for the same maturity is called the swap spread. Historically, swap spreads have been positive (swap rates exceed Treasury yields) because swap counterparties carry credit risk beyond the risk-free Treasury. However, in the U.S. market, 30-year swap spreads have periodically turned negative — meaning 30-year swap rates fell below 30-year Treasury yields — a phenomenon driven by supply-demand imbalances, balance sheet constraints at primary dealers, and pension fund hedging flows.
Swap rates serve as benchmark rates for much of the global fixed income market, particularly in Europe and Asia, where the swap curve is more liquid than government bond markets for certain maturities. In the United States, fixed-rate mortgage pricing, corporate bond issuance economics, and interest rate hedging all reference swap rates extensively. A corporation issuing a fixed-rate bond will often simultaneously enter into a swap to convert the fixed-rate obligation into floating-rate exposure, effectively swapping the bond proceeds' interest economics without altering the public bond terms.
The transition from LIBOR to SOFR between 2021 and 2023 reshaped the swap market significantly. LIBOR-referenced swaps were replaced by SOFR-based swaps, requiring adjustments to standard documentation, clearing arrangements, and pricing conventions. SOFR compound-in-arrears swaps and SOFR term rate swaps now dominate the U.S. dollar swap market.
Swap rates provide a forward-looking signal about monetary policy expectations. When markets anticipate Federal Reserve rate cuts, short-maturity swap rates decline; when tightening is expected, they rise. The entire swap rate curve shifts and reshapes in response to incoming economic data, Fed communications, and global capital flows, making it a rich source of market intelligence for rates traders and macro analysts.