What Is a Floating-Rate Bond?
Fixed-rate bonds lock in a coupon at issuance and never change it, which is simple but leaves the bond exposed if rates move. A different design solves that problem by letting the payment move too.
The short answer
A floating-rate bond pays interest that resets periodically based on a reference rate plus a set spread, rather than staying fixed for the life of the bond. As the reference rate moves up or down, so does the coupon payment on the next reset date. This structure trades a fixed, predictable payment for one that tracks the broader interest rate environment.
How the reset mechanism works
A floating-rate bond’s coupon is typically expressed as a reference rate plus a spread — for example, a benchmark short-term rate plus a fixed number of percentage points. On a set schedule, often quarterly, the bond’s coupon is recalculated using the current level of that reference rate. If the reference rate rises between reset dates, the next coupon payment rises with it. If the reference rate falls, so does the payment. The spread over the benchmark generally stays constant, reflecting the issuer’s credit risk profile at issuance, while the base rate component does the moving.
This is different from a fixed loan’s rate, which stays the same regardless of what happens in the broader rate environment — a floating-rate bond is built specifically so its payment doesn’t stay static.
Why interest rate risk is lower
- Price stability when rates move. A fixed-rate bond’s price falls when interest rates rise, because its locked-in coupon becomes less attractive compared with newly issued bonds. A floating-rate bond’s coupon adjusts instead, so its price tends to stay closer to face value across changing rate environments — a dynamic related to what bond duration measures for fixed instruments.
- Coupon income rises with rates. When rates climb, floating-rate bondholders generally see their payments increase at the next reset, rather than being stuck collecting a below-market coupon until maturity.
- Coupon income falls with rates too. The same mechanism cuts both ways — if rates decline, the coupon on a floating-rate bond declines at the next reset as well, so the income stream isn’t insulated from falling rates, only from a fixed coupon lagging behind a rising environment.
What to weigh before considering one
Floating-rate bonds reduce interest rate risk but don’t eliminate other risks that any bond carries, including the issuer’s ability to make payments and, for some floating-rate instruments, changes to the underlying reference rate’s structure or availability. The reference rate and spread used also matter — two floating-rate bonds from different issuers can behave very differently depending on how their reset terms are written. Comparing a floating-rate bond to a fixed-coupon alternative, such as a plain corporate bond, often comes down to a view on which direction rates are likely to move and how much predictability matters for a given goal.
How it fits within a bond allocation
Floating-rate bonds are sometimes used alongside fixed-rate holdings as part of broader diversification within a fixed-income allocation, since the two respond differently to the same rate-moving event. Neither approach is inherently better — it depends on the investor’s time horizon, need for predictable income, and view on the reference rate. As with any income-generating investment, the tax treatment of the interest received depends on the type of account it’s held in and can change over time.
What to weigh
A floating-rate bond exchanges the predictability of a fixed coupon for reduced sensitivity to interest rate swings, with payments that move alongside a reference rate rather than sitting still. Whether that trade makes sense depends on an investor’s own goals, time horizon, and comfort with a coupon that isn’t locked in from day one.