A floating rate bond is a debt security whose interest payments adjust periodically based on a benchmark rate, rather than staying locked in at one rate for the life of the bond. This means your coupon payments rise when interest rates go up and fall when rates drop. Floating rate bonds are issued by governments, corporations, and banks, and they play a specific role in a portfolio: protecting against rising interest rates while generating steady income.
How the Interest Rate Is Calculated
Every floating rate bond has two components that determine what you earn: a reference rate (also called an index rate) and a fixed spread. The reference rate moves with the market. The spread is a premium set when the bond is first issued, and it stays the same for the entire life of the bond. Your interest rate at any given time is the reference rate plus the spread.
For example, if the reference rate is 4.00% and the spread is 0.15%, your interest rate is 4.15%. Next quarter, if the reference rate climbs to 4.50%, your rate becomes 4.65%. The spread never changes, but the total rate does.
The specific benchmark used as the reference rate depends on the issuer. U.S. Treasury floating rate notes (FRNs) use the highest accepted discount rate from the most recent 13-week Treasury bill auction as their index rate. Because the Treasury auctions 13-week bills every week, the index rate on Treasury FRNs resets weekly. Corporate floating rate bonds more commonly reference the Secured Overnight Financing Rate, known as SOFR, which tracks overnight lending costs in the Treasury repurchase market. Before mid-2023, many corporate floaters referenced LIBOR, but that benchmark has been phased out and replaced by SOFR.
How Often Payments Reset
The reset frequency tells you how often the bond recalculates its interest rate based on the current benchmark. Treasury FRNs reset their index rate every week, with interest accruing daily on the bond’s par value. Corporate and bank-issued floaters typically reset every one to three months, with quarterly resets being the most common structure.
Interest is usually paid quarterly. On each payment date, you receive a coupon based on the rates that applied during that period. Because the rate adjusts so frequently, your income stream closely tracks whatever is happening in the broader interest rate environment, with only a short lag between a rate change and its effect on your payments.
Why Price Stays Stable
This is the core appeal of floating rate bonds. Traditional fixed rate bonds lose value when interest rates rise because their locked-in coupon becomes less attractive compared to newly issued bonds paying higher rates. The longer the bond’s maturity, the steeper the price drop.
Floating rate bonds largely sidestep this problem. Because the coupon resets to reflect current rates, the bond’s price stays close to its face value regardless of what rates do. In bond terminology, floaters have very low “duration,” which measures how sensitive a bond’s price is to interest rate changes. A 10-year Treasury bond might have a duration of 8 or 9 years, meaning its price drops roughly 8% to 9% for every one-percentage-point rise in rates. A floating rate note’s duration is typically measured in weeks or months, reflecting just the short window until the next rate reset.
The tradeoff is symmetrical. When rates fall, fixed rate bondholders enjoy price appreciation as their above-market coupon becomes more valuable. Floating rate bondholders don’t get that benefit. Their coupon simply adjusts downward, and the price stays flat. Income is the dominant driver of returns, not price movement.
Treasury Floating Rate Notes
The U.S. Treasury began issuing floating rate notes in 2014, making them the newest type of marketable Treasury security. They mature in two years from their issue date and are auctioned monthly. You can buy them through TreasuryDirect with a minimum purchase of $100 or through a broker on the secondary market.
Because they carry the full backing of the U.S. government, Treasury FRNs have no credit risk. The spread determined at auction tends to be very small, reflecting that safety. As a benchmark, the S&P U.S. Treasury Bond Floating Rate Index showed a yield to maturity of 3.72% as of March 31, 2026, with a one-year return of 4.04% and a three-year annualized return of 4.85%.
Treasury FRNs work well as a parking spot for cash you want to keep safe while earning a rate that moves with the market. They’re particularly useful when you expect rates to stay elevated or continue climbing.
Corporate and Bank-Issued Floaters
Corporations and financial institutions also issue floating rate bonds, typically referencing SOFR plus a wider spread than Treasury FRNs. The spread compensates you for credit risk, since a corporate borrower is more likely to default than the U.S. government. Investment-grade corporate floaters might offer a spread of 0.50% to 1.50% over SOFR, while lower-rated issuers pay more.
Bank loans, sometimes called leveraged loans or senior secured loans, are a closely related category. These are floating rate loans made to companies, often with below-investment-grade credit ratings, that reset every one to three months. Individual investors typically access them through mutual funds or ETFs rather than buying individual loans. The higher spreads on these instruments mean more income, but also more credit risk and less liquidity.
When Floating Rate Bonds Make Sense
Floating rate bonds are most valuable in a rising rate environment. If the Federal Reserve is tightening monetary policy or inflation is pushing short-term rates higher, the coupon on a floater adjusts upward while traditional bond prices decline. During the rate-hiking cycle from early 2022 through mid-2023, for instance, floating rate funds significantly outperformed intermediate and long-term bond funds because their coupons kept pace with rising rates while fixed rate bonds lost value.
They also serve as a lower-volatility income option when you’re uncertain about the direction of rates. Because the price stays near par, you avoid the roller coaster of mark-to-market losses that can come with longer-duration bonds. This makes them useful for money you might need in the near term or for the conservative sleeve of a broader portfolio.
The environment where floaters underperform is when rates are falling. Each reset brings a lower coupon, and unlike fixed rate bonds, you don’t get any price appreciation to offset the lost income. If you believe rates are heading meaningfully lower, locking in a fixed rate bond at current yields would typically serve you better.
How to Buy Floating Rate Bonds
The simplest route for most investors is through a floating rate bond fund or ETF. These hold diversified portfolios of floaters, handle the reinvestment of coupons, and trade on exchanges like stocks. Some funds focus exclusively on Treasury FRNs, while others hold investment-grade corporate floaters or a mix that includes bank loans. Expense ratios on these funds typically range from 0.03% for Treasury-focused index funds to 0.50% or more for actively managed bank loan funds.
If you prefer individual securities, you can buy Treasury FRNs directly through TreasuryDirect.gov with no transaction fees, or through a brokerage account. Corporate floating rate notes trade on the secondary bond market through brokers, though individual corporate floaters can be harder to find and less liquid than Treasuries. Minimum purchase amounts vary, but $1,000 face value is standard for most bonds.