What Is a Floating-Rate Bond?
Most bonds are introduced to new investors through a fixed-rate example: a stated coupon, paid on a set schedule, for the life of the bond. A floating-rate bond, sometimes called a floating-rate note or FRN, works differently. Instead of a coupon fixed at issuance, its interest payment resets periodically, tracking a short-term reference rate plus a fixed spread agreed to at issuance.
That single structural difference changes how the bond behaves. This article covers how the coupon reset actually works, why floating-rate bonds tend to have much lower price sensitivity to interest rate changes than fixed-rate bonds, how credit risk differs sharply across the instruments that get grouped under the "floating rate" label, from Treasury notes to bank loan funds, and how the interest is generally taxed.
How Does the Coupon Reset Work?
A floating-rate bond's coupon is generally set as a reference rate plus a fixed spread, reset on a regular schedule that varies by instrument. As of publication date, many newly issued U.S. dollar corporate floating-rate notes use SOFR, the Secured Overnight Financing Rate, or a SOFR-based measure, following the transition away from U.S. dollar LIBOR as a benchmark. Not all floating-rate securities use SOFR, however: Treasury floating-rate notes use a different index tied to the highest accepted discount rate of the most recent 13-week Treasury bill auction, resetting weekly, with the spread over that index fixed for the life of the note. The specific reference rate, spread, reset frequency, and calculation convention should be confirmed in a security's offering documents rather than assumed.
Key characteristics:
- The coupon is recalculated on each reset date using the then-current reference rate plus the bond's fixed spread, which does not change over the bond's life
- Between reset dates, the coupon stays fixed at the most recently set level, so payments step up or down periodically rather than continuously
- The spread over the reference rate generally reflects the issuer's credit quality at issuance and, once set, does not adjust for later changes in that issuer's credit profile
- A floating-rate bond's price still moves with changes in credit spreads, market liquidity, and time to the next reset, even though it is largely insulated from changes in the reference rate itself
Why the spread matters as much as the reference rate: Two floating-rate bonds referencing the same benchmark can have very different income and risk profiles depending on the spread attached at issuance. A wider spread can reflect greater perceived credit risk, but the spread can also reflect liquidity, market conditions, structural features, and other characteristics of the security, so the spread, not just the headline reference rate, should be evaluated when comparing floating-rate bonds.
How Do Floating-Rate Bonds Compare to Fixed-Rate Bonds?
| Feature | Floating-Rate Bond | Fixed-Rate Bond |
|---|---|---|
| Coupon | Resets periodically to reference rate plus fixed spread | Set at issuance and unchanged for the life of the bond |
| Price sensitivity to reference rate changes | Generally low; price tends to stay closer to par between resets | Generally higher; price moves inversely with market yields |
| Effective duration | Generally much shorter than a comparable fixed-rate bond's, with the exact sensitivity depending on reset frequency, reference-rate convention, spread, and other structural features | Generally close to the bond's time to maturity, longer for longer-maturity bonds |
| Income in a rising-rate environment | Coupon payments generally rise as the reference rate rises | Coupon stays fixed; relative income can lag as market yields rise |
| Income in a falling-rate environment | Coupon payments generally fall as the reference rate falls | Coupon stays fixed; relative income can look more attractive as market yields fall |
| Credit risk | Depends entirely on issuer; not reduced by the floating structure itself | Depends entirely on issuer |
(as of the original publication date)
Why Do Floating-Rate Bonds Have Low Interest Rate Sensitivity?
A fixed-rate bond's price moves inversely with market yields because its coupon is locked in while the rates available on newly issued bonds change around it. A floating-rate bond's periodically adjusting coupon reduces this dynamic, since the coupon moves toward the reference rate at each reset rather than staying fixed for the life of the bond. A useful intuition is that the floating coupon reduces the bond's sensitivity to changes in the reference rate because the coupon periodically adjusts. However, effective duration is not simply equal to the time remaining until the next reset, and the actual sensitivity depends on the security's reset frequency, reference-rate convention, spread, embedded caps or floors, call features, and market conditions.
This generally means a floating-rate bond with a longer stated maturity can carry meaningfully lower effective duration than a fixed-rate bond of the same maturity, though the degree varies by structure rather than following a single rule of thumb. It is a meaningfully different exposure from the interest-rate risk discussed in the related post on nominal Treasuries versus TIPS, where duration is tied to a bond's full remaining maturity regardless of reset structure.
What this low sensitivity does not do: A short effective duration reduces price sensitivity to reference rate changes. It does not eliminate credit risk, and it does not mean the bond cannot lose value for other reasons, including a widening credit spread if the issuer's perceived creditworthiness deteriorates, or a decline in overall market liquidity for that type of instrument.
What Is the Difference Between Treasury Floating-Rate Notes, Corporate FRNs, and Bank Loan Funds?
The phrase "floating rate" describes a coupon structure, not a credit profile, and instruments carrying that label span a very wide range of credit risk.
Treasury floating-rate notes: Issued by the U.S. Treasury and carrying the credit backing of the U.S. government, these are generally considered to carry minimal credit risk. Their appeal is primarily the combination of that credit quality with a coupon that adjusts with short-term rates.
Corporate floating-rate notes: Issued by individual corporations, these carry that specific issuer's credit risk, similar in kind to a fixed-rate corporate bond from the same issuer, though the coupon structure differs. Evaluating a corporate FRN generally requires the same credit analysis as any other corporate bond from that issuer.
Bank loan funds: Often called leveraged loan or senior loan funds, many bank loan funds primarily hold loans to below-investment-grade corporate borrowers. The shared floating-rate feature does not make these investments comparable from a credit-risk perspective. A typical bank loan fund can have substantially greater credit and liquidity risk than a Treasury floating-rate note because its underlying loans are generally issued by below-investment-grade corporate borrowers. Bank loan funds also frequently hold loans that are structurally senior and secured by collateral, which can, in some cases, affect recovery outcomes in a default relative to unsecured high-yield bonds, but that seniority does not offset the below-investment-grade credit risk of the underlying borrowers.
For a broader look at how fund structure itself, apart from credit risk, affects diversification and liquidity, see the related post on individual bonds versus bond funds.
Does Tax Treatment Differ for Floating-Rate Bonds?
Interest from taxable floating-rate bonds is generally taxed as ordinary income. For a typical cash-method individual taxpayer, stated interest is generally reported when received, although special rules can require income to be recognized as it accrues for certain instruments, including some securities with original issue discount.
Where the source of the bond changes the outcome: Interest from a Treasury floating-rate note is generally exempt from California state income tax, consistent with the treatment of other U.S. Treasury interest, while remaining subject to federal income tax. Income distributed by corporate floating-rate bond funds or bank loan funds is generally taxable at the federal and California state levels, although the tax character of a fund's distributions can vary, including ordinary income, original issue discount-related income, and capital gains components, and should be confirmed from the fund's tax reporting rather than assumed to be interest income alone. Because a floating-rate bond's coupon changes periodically, the dollar amount of taxable income reported can also vary from year to year in a way that is generally more predictable to anticipate with a fixed-rate bond's level coupon.
For a fuller discussion of how bond type interacts with account placement, see the related post on tax-exempt versus taxable fixed income.
Where Might Floating-Rate Bonds Fit in a Portfolio?
Floating-rate bonds may be considered when:
- Reducing price sensitivity to changes in short-term interest rates is a priority for a portion of the fixed-income allocation
- An investor wants income that may adjust higher alongside short-term rates rather than staying fixed
- The specific credit exposure, whether Treasury, corporate, or bank loan, has been evaluated on its own terms rather than assumed based on the "floating rate" label alone
Fixed-rate bonds may still be preferred when:
- Locking in a fixed contractual coupon and, when purchased at a known price and held to maturity subject to issuer credit risk, a known yield-to-maturity is the priority, particularly if rates are expected to decline
- A specific future cash need is being matched to a bond's fixed maturity and known coupon schedule, such as a rung in a bond ladder
- Predictable, level income is more useful than income that adjusts with short-term rates
A blended approach: Many fixed-income allocations hold both structures, using floating-rate exposure to manage sensitivity to short-term rate changes for part of the portfolio while relying on fixed-rate bonds elsewhere for predictable cash flow and known maturity dates. The appropriate mix, and how much credit risk to take on within the floating-rate portion, depends on the portfolio's existing duration, credit exposure, liquidity needs, tax considerations, and cash-flow requirements.
Common Mistakes When Evaluating Floating-Rate Bonds
Mistake 1: Assuming "floating rate" describes a credit profile rather than a coupon structure.
Risk: Treating a bank loan fund as comparable in credit risk to a Treasury floating-rate note simply because both are described as floating rate.
Approach: Evaluate the underlying issuer or borrower credit quality separately from the coupon reset mechanism.
Mistake 2: Expecting floating-rate bonds to behave like a hedge against rising rates in every sense.
Risk: Overlooking that income from a floating-rate bond also falls when the reference rate falls, so the structure cuts both ways rather than only benefiting the investor.
Approach: Evaluate floating-rate exposure on its full behavior across both rising- and falling-rate environments, not only the upside case.
Mistake 3: Assuming a short effective duration means the bond cannot lose value.
Risk: Being surprised when a floating-rate bond's price declines due to widening credit spreads or reduced market liquidity, even though the reference rate itself has not moved against the bond.
Approach: Recognize that low sensitivity to reference rate changes does not equal low sensitivity to credit or liquidity conditions.
Mistake 4: Overlooking the tax distinction between Treasury and non-Treasury floating-rate interest.
Risk: Assuming all floating-rate interest receives the same state tax treatment, and being surprised by California tax owed on corporate or bank loan fund interest that would not have applied to a Treasury floating-rate note.
Approach: Confirm the issuer type before assuming California state tax exemption applies.
Deeper Dives: Related Topics
For related fixed income strategy, explore:
→ Related strategyNominal Treasuries vs. TIPS → → Related strategyIndividual Bonds vs. Bond Funds → → Related strategyBond Fund Sell-Offs and Rising Yields → → Related strategyTax-Exempt vs. Taxable Fixed Income →The Bottom Line
A floating-rate bond's periodic coupon reset changes its behavior in ways a fixed-rate bond's investors may not anticipate: generally lower price sensitivity to changes in short-term rates, income that moves with the reference rate in both directions, and a credit risk profile that depends entirely on the underlying issuer rather than on the floating structure itself.
That last point is the one most often glossed over. A Treasury floating-rate note, a corporate floating-rate note, and a bank loan fund can all be described with the same "floating rate" label while carrying very different credit exposures, and conflating them is one of the more common ways this part of a fixed-income allocation gets misjudged. Where floating-rate exposure fits, and how much credit risk to take on within it, depends on the portfolio's existing duration, credit exposure, liquidity needs, tax situation, and income requirements.