Do Floating-Rate Bonds Have No Interest-Rate Risk?

Why a Floating Coupon Reduces Duration Risk but Does Not Make a Bond Immune to Changing Interest Rates

Introduction

One of the most persistent misconceptions in fixed income is that floating-rate bonds eliminate interest-rate risk. The reasoning appears straightforward: if market interest rates rise, the coupon of a floating-rate bond eventually rises as well. Unlike a conventional fixed-rate bond, the investor is therefore not locked into the same coupon while newly issued securities begin paying significantly higher rates.

There is an important element of truth in this argument. Floating-rate securities generally have much lower sensitivity to changes in benchmark interest rates than comparable fixed-rate bonds. But lower sensitivity is not the same as zero risk.

A floating-rate note can still lose value. Its market price can move because of changes in credit spreads, liquidity, expectations about future reference rates, the timing of coupon resets and the contractual spread embedded in the security. Understanding this distinction reveals why floating-rate bonds are useful instruments but not risk-free substitutes for fixed-rate debt.

The Myth: A Floating Coupon Keeps the Bond at Par

The logic behind the myth initially appears convincing. A conventional bond might pay a fixed coupon of 3% for ten years. If comparable market yields suddenly rise to 5%, investors have little reason to purchase the existing bond at its original price when newly issued securities offer substantially higher income. Its market price must decline until its yield becomes competitive.

A floating-rate bond works differently because its coupon periodically resets according to a reference rate. A simplified structure might pay a short-term benchmark plus 100 basis points. If the benchmark increases from 3% to 4%, the coupon eventually increases from approximately 4% to 5%. Because the income adjusts toward prevailing market conditions, substantially less price adjustment is normally required.

This mechanism explains why floating-rate bonds typically have relatively low duration. It does not, however, guarantee that the security will always trade at par. The benchmark rate is only one component determining the return investors require.

How Floating-Rate Bonds Actually Work

Most floating-rate securities calculate their coupons using a reference rate combined with a contractual spread. The reference component changes periodically, while the spread is normally determined when the security is issued. Different markets use different benchmarks and reset conventions, meaning that the exact behavior of an FRN depends heavily on its contractual structure.

U.S. Treasury Floating Rate Notes provide a useful example. Their interest payments are linked to the 13-week Treasury bill rate, while an additional spread is established at auction. As short-term Treasury bill rates change, the interest paid by the FRN changes as well. The security therefore responds much more quickly to changes in short-term rates than a conventional fixed-rate Treasury note.

The important point is that only the floating component automatically adjusts. Other factors influencing the bond’s required yield can change independently, creating differences between the coupon investors receive and the return the market currently demands.

The Hidden Importance of Reset Risk

Floating-rate coupons usually reset periodically rather than continuously. This creates a gap between movements in market rates and changes in the income received by investors. If interest rates rise sharply shortly after the coupon has been determined, the security may temporarily pay less than a newly issued instrument reflecting the latest market conditions.

The significance of this reset risk depends on the structure of the bond. A security that resets frequently will generally respond more rapidly than one with longer periods between resets. Investors therefore need to understand the reference rate, observation period, reset frequency and payment schedule rather than treating every floating-rate security as economically identical.

Reset risk is usually much smaller than the duration exposure associated with a long-maturity fixed-rate bond, but it demonstrates why the phrase “no interest-rate risk” is misleading. The adjustment mechanism reduces the effect of changing rates; it does not necessarily transmit every market movement immediately.

Floating Rates Do Not Mean Floating Credit Spreads

The distinction becomes even more important with corporate floating-rate bonds. Consider a company that issues debt paying a benchmark rate plus 100 basis points. If the benchmark increases, the coupon adjusts accordingly. However, suppose the company’s financial position subsequently deteriorates and investors begin demanding 250 basis points of compensation for holding its credit risk.

The bond’s contractual spread does not automatically increase from 100 to 250 basis points simply because the market now considers the issuer riskier. Instead, the existing bond may need to fall in price until its expected return becomes competitive with the new level of compensation demanded by investors.

This means a floating-rate corporate bond can decline substantially even when its benchmark-rate mechanism is working exactly as intended. The investor has reduced exposure to changes in the underlying reference rate but remains exposed to changes in the issuer’s credit spread.

Credit Risk Can Dominate Interest-Rate Protection

This distinction explains why some floating-rate instruments can experience meaningful losses during periods of financial stress. Investors sometimes focus on their low duration and assume that rising rates represent the primary threat. For lower-quality corporate issuers, however, widening credit spreads can have a much larger effect than movements in the reference rate itself.

A floating-rate bond paying a benchmark plus 1% may look attractive when the issuer is considered financially strong. If investors later demand a benchmark plus 3% because default risk has increased, the automatic adjustment of the benchmark component provides little protection against the additional two percentage points of required credit compensation.

Floating-rate debt therefore separates benchmark-rate exposure from credit-spread exposure more clearly than many fixed-rate instruments. This can make it useful for portfolio construction, but it also means investors need to identify which risk they are actually trying to reduce.

Government FRNs Are Different

Government floating-rate securities can remove much of the corporate credit-spread problem, particularly when issued by highly rated sovereign borrowers in their own currencies. Even then, however, their market prices are not permanently fixed at par. Changes in required margins, liquidity and market conditions can still cause prices to trade above or below face value.

There is also an interesting transfer of interest-rate exposure between investors and issuers. When short-term rates rise, holders of floating-rate government debt receive higher coupons. The government, however, must make those higher payments. Compared with issuing long-term fixed-rate debt, the borrower retains greater exposure to future changes in short-term financing costs.

Floating-rate debt therefore does not remove interest-rate risk from the financial system. To some extent, it changes who carries that risk.

The Trade-Off When Interest Rates Fall

Floating-rate securities also behave differently when interest rates decline. An investor holding a high-coupon fixed-rate bond can benefit substantially from falling yields because the existing coupon becomes increasingly attractive relative to newly issued securities. The bond’s price can rise, generating capital gains in addition to its coupon income.

A floating-rate investor receives much less of this benefit because the coupon resets downward as the reference rate falls. The same mechanism that protects the investor when short-term rates rise also reduces the potential upside when they decline.

This is one of the fundamental trade-offs between fixed and floating debt. Fixed-rate investors accept greater duration exposure in exchange for the possibility of substantial price appreciation when yields fall. Floating-rate investors sacrifice much of that potential upside in exchange for greater protection against rising short-term rates.

Liquidity Risk Does Not Disappear Either

A bond’s coupon structure cannot guarantee that investors will always find buyers at attractive prices. During periods of market stress, liquidity can deteriorate rapidly, particularly in corporate credit markets. Investors may demand an additional liquidity premium simply because a security becomes more difficult to trade.

A floating-rate bond can therefore decline even if its issuer remains solvent and its reference rate continues resetting normally. If market participants become reluctant to hold the security, the price may need to fall sufficiently to compensate buyers for reduced liquidity.

This reinforces the broader point that bond risk is multidimensional. Duration, credit, liquidity, refinancing conditions and market structure can all influence returns independently.

Why Investors Still Use Floating-Rate Bonds

None of these limitations make floating-rate securities inherently unattractive. They can be highly effective instruments for reducing portfolio duration and maintaining income when short-term interest rates rise. Investors expecting policy rates to remain elevated may prefer floating coupons because the income stream can adjust without requiring the investor to continually replace maturing securities.

Banks and other financial institutions may also find floating-rate assets useful when their own liabilities respond to short-term interest rates. Governments and corporations can use floating-rate issuance to diversify their funding structures and investor bases.

The advantage of floating-rate debt therefore lies in risk management rather than risk elimination. Investors can deliberately reduce exposure to one variable while accepting greater exposure to others.

The Bigger Bond Market Lesson

Floating-rate bonds reveal a recurring misconception in fixed-income investing: securities are often labeled according to the risk they reduce rather than the risks they continue to contain. Inflation-linked bonds provide inflation protection but still carry duration and real-yield risk. Government bonds can have extremely low credit risk while remaining highly sensitive to inflation and interest rates. Floating-rate bonds reduce conventional duration exposure while leaving credit, liquidity and reset risks intact.

Professional bond analysis therefore requires separating these individual sources of risk rather than simply classifying securities as safe or risky. Two bonds with the same maturity can respond completely differently to the same economic event because their coupons, credit exposures and contractual structures differ.

Floating-rate bonds are a particularly clear example because their apparent simplicity hides an important redistribution of risk beneath the surface.

Conclusion

The claim that floating-rate bonds have no interest-rate risk is a myth. Their coupons adjust with a reference rate, which generally makes them far less sensitive to changing short-term rates than comparable fixed-rate securities. But lower duration does not guarantee price stability. Reset timing, credit-spread movements, liquidity conditions and changes in required market compensation can still produce losses.

The more accurate description is that floating-rate bonds transform the investor’s interest-rate exposure. They reduce sensitivity to movements in the reference rate while leaving other sources of fixed-income risk intact. They also surrender much of the capital appreciation that fixed-rate bonds can generate when yields decline.

For investors, the distinction is fundamental: floating-rate bonds do not eliminate risk and they change where the risk comes from.

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Last Updated: August 16, 2026

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