Coupon Rate
The coupon rate is the annual interest rate paid by a bond issuer on the face value of the bond, expressed as a percentage and typically distributed to bondholders in semi-annual payments.
The term 'coupon' is a relic from the era of paper bonds, when bondholders would literally clip coupons from the certificate and present them to the issuer to collect interest. Today the process is entirely electronic, but the terminology endures. The coupon rate is set at issuance and — for traditional fixed-rate bonds — does not change over the life of the security. If a bond has a $1,000 face value and a 5% coupon rate, the holder receives $50 per year, typically paid in two $25 installments every six months.
It is essential to distinguish the coupon rate from a bond's yield. The coupon rate is fixed; it reflects the interest rate environment and the issuer's creditworthiness at the time of issuance. The yield, by contrast, fluctuates daily as the bond's market price changes. A bond issued at par (face value) will have a coupon rate equal to its current yield. But if that bond subsequently trades at a discount — say, $950 — the current yield rises above the coupon rate because the buyer is receiving the same dollar interest on a lower investment.
In the U.S. Treasury market, coupon rates are set by the government through competitive auctions. When the 10-year Treasury auction clears, the coupon is set at or near the clearing yield to ensure the bonds are issued close to par. The resulting coupon becomes a widely watched benchmark — the '10-year Treasury yield' that appears in financial news and influences everything from mortgage rates to corporate bond pricing.
Floating-rate bonds — sometimes called floaters or variable-rate notes — have coupon rates that reset periodically based on a reference rate, such as the Secured Overnight Financing Rate (SOFR), which replaced LIBOR as the dominant U.S. benchmark in 2023. Floating-rate bonds provide a natural hedge against rising interest rates, making them popular with investors who anticipate a tightening monetary policy cycle.
For callable bonds, which allow the issuer to redeem the bond before maturity, the coupon rate is typically set slightly higher than comparable non-callable bonds to compensate investors for the reinvestment risk — the risk that the issuer will call the bond precisely when interest rates have fallen and reinvestment options are less attractive. Understanding the coupon rate in context with yield measures is fundamental to evaluating any fixed income investment.