Interest Rates Are Rising. Can These Mutual Funds Protect Your Money?

Higher interest rates sound like good news for someone investing in debt. New investments can earn more interest, but the fixed-rate bonds already sitting in a mutual fund portfolio can lose value. Your debt fund NAV may therefore fall just when you expect its returns to improve.

Floating rate mutual funds appear to solve this problem because their interest income can adjust as reference rates change. With the RBI raising its repo rate on October 7, that feature has become more relevant. However, the adjustment may arrive later than expected, and some funds create floating-rate exposure through derivatives rather than investing entirely in floating-rate bonds.

The useful question is how much protection a particular portfolio offers, how quickly its income adjusts, and what can still go wrong. A floating-rate label alone cannot answer those questions.

What Does the Latest RBI Rate Hike Mean for Debt Funds?

On October 7, 2026, the RBI increased its repo rate by 25 basis points, from 5.25% to 5.50%. It also changed its policy stance from neutral to calibrated tightening. In its official statement, the central bank explained that near-term policy action could be another hike or a pause, depending on economic conditions.

Bond markets also reacted, but the movement was different in size. Moneycontrol reported that the 10-year benchmark government bond yield rose from 7.1903% the previous day to 7.2436% during trading on October 7. That was an increase of about 5.3 basis points, considerably smaller than the repo rate increase.

The repo rate is a policy rate, while bond yields reflect expected policy, inflation, borrowing and demand for securities. An anticipated hike may already be partly reflected in yields before its announcement.

Short-term rates also respond to banking-system liquidity. RBI's October 6 data showed a weighted average call money rate of 5.12%, a pre-hike observation rather than the new policy rate or every floating bond's benchmark.

For debt mutual funds, longer-duration fixed-rate holdings face greater price sensitivity, while short-maturity investments can reinvest at prevailing rates. Floating-rate portfolios adjust through resets or derivatives, with different timing across schemes.

What Are Floating Rate Mutual Funds and How Do They Work?

Floating rate mutual funds invest predominantly in debt exposure whose income changes with a reference rate. This can be a Treasury bill rate or an overnight money-market benchmark, rather than the repo rate itself.

SEBI's February 26, 2026 categorisation circular calls the category Floating Interest Rates Fund. It requires at least 65% of total assets in floating-rate instruments, including fixed-rate instruments converted into floating-rate exposure using swaps or derivatives. Consequently, a fund can comply with the category mandate while holding substantial fixed-coupon bonds alongside interest rate swaps.

Consider a hypothetical bond paying a reference rate plus a fixed spread of 1 percentage point. If the reference rate moves from 6% to 7%, its annual coupon moves from 7% to 8% at the next applicable reset. A conventional fixed-rate bond paying 7% continues paying that coupon.

The reference rate determines what moves, and the reset period determines when it moves. Quarterly resets and benchmark-averaging terms can delay transmission beyond the day of an RBI announcement.

A synthetic floating-rate position works differently. The fund receives a bond's fixed coupon and enters a swap under which it pays a fixed rate and receives a floating rate. The combination changes its interest-rate exposure, while the original bond's issuer risk remains.

Why Can Debt Fund NAVs Fall When Interest Rates Rise?

An existing bond paying 7% becomes less attractive when comparable new bonds offer 8%. Its market price generally falls until its future payments offer a competitive yield to a new investor. The contractual coupon remains unchanged even though the price has moved.

Coupon income is the instrument's promised interest. Yield to maturity, or YTM, incorporates its price and expected payments through maturity, subject to repayment and reinvestment assumptions. Portfolio YTM is neither the coupon rate nor a promised investor return.

Mutual fund NAV reflects the portfolio's valued assets after liabilities and expenses, divided by outstanding units. It captures changes in bond prices as well as accrued income and derivative valuations. Interest can keep accumulating while a larger valuation loss pulls NAV lower.

Modified duration estimates sensitivity to changes in yields. For an illustrative 1-percentage-point yield increase, portfolios with modified durations of 0.5, 2 and 4 years could experience price declines of roughly 0.5%, 2% and 4%, respectively, before income and other effects.

These approximations assume relevant yields move together and other factors stay unchanged. Duration does not capture every credit-spread effect, and low interest-rate sensitivity does not mean all risks are low.

When Do Floating Rate Funds Benefit From Rising Rates?

The clearest advantage arises when the relevant reference rate increases, coupons reset quickly and credit conditions remain stable. Income improves, while resets can reduce price sensitivity relative to a similar fixed-rate instrument.

A Treasury bill-linked bond responds to that benchmark's reset formula, while a swap may reference overnight rates. Neither must rise by the same amount as the repo rate.

For synthetic exposure, a pay-fixed, receive-floating swap can gain value when relevant swap rates rise, helping offset losses on fixed-rate bonds. However, corporate bond yields and swap rates do not always move together. This mismatch, called basis risk, can leave part of the bond-price loss unhedged.

The spread investors demand over a reference yield can widen if concerns about an issuer or liquidity increase. A bond's contractual coupon spread may stay fixed while the market demands more, depressing its price despite a higher reference rate.

Floating rate funds can therefore earn more interest and still post a negative total return. Income, valuation changes, derivative results and expenses all contribute to the outcome, so protection against certain rate movements does not eliminate other losses.

A Simple Example of a 1-Percentage-Point Rate Increase

Consider two hypothetical portfolios, each initially worth ₹1 lakh. Portfolio A pays a fixed 7%, while Portfolio B initially pays a 6% reference rate plus a 1-percentage-point spread. Both pay quarterly coupons and repay principal after one year.

Immediately after investment, the reference rate rises from 6% to 7% and the relevant discount yield from 7% to 8%. Assume a flat yield curve that stays unchanged thereafter, without implying that all real market rates move uniformly.

Portfolio B's already-set first-quarter coupon remains 7% annualised. Its coupon resets to 8% after three months and stays there for the remaining nine months. Assume full repayment, unchanged credit spreads, no trading, no coupon reinvestment, no expenses or taxes, and no derivatives or coupon caps.

Prices discount payments at a 2% quarterly rate. Portfolio B earns ₹1,750 initially and ₹2,000 for each later quarter, totalling ₹7,750. Its benefit is 0.75 percentage points because the higher coupon applies for nine months.

Both initially lose market value but recover principal at maturity under the repayment assumption. The initial loss must not be subtracted again from the maturity return, while an early exit receives the prevailing price.

An open-ended mutual fund continually adjusts and reinvests its portfolio without this single maturity date. Its returns include expenses and changing valuations, so this illustration does not forecast a fund's return.

Floating Rate Funds vs Other Debt Mutual Funds

The same rate outlook can support different choices depending on when the investor needs the money. This comparison describes category structures and typical sensitivities, while individual schemes can differ materially.

Sources: SEBI, Categorization and Rationalization of Mutual Fund Schemes, February 26, 2026, and AMFI investor education material. Macaulay duration measures the weighted timing of cash flows and differs from modified duration's price-sensitivity measure.

Liquid funds adapt through frequent reinvestment while carrying limited duration exposure. A floater with longer credit exposure, slower resets or higher costs may offer no decisive advantage for a near-term goal.

What Actual Indian Floating Rate Fund Portfolios Reveal

The table uses a common August 31, 2026 portfolio snapshot to illustrate differences within the category. AUM means month-end scheme assets, rather than monthly averages or direct-plan assets alone.

Sources: HDFC Mutual Fund August 2026 factsheet, Kotak Mutual Fund August 2026 factsheet, and DSP Mutual Fund's official portfolio disclosure as of August 31, 2026. YTM is a portfolio indicator before investor-level tax and is not an assured return.

Higher YTMs need to be read alongside credit exposure. HDFC and Kotak included lower-rated holdings, while DSP's dated portfolio contained corporate and money-market exposure alongside government securities. Yield differences do not establish superior rate protection.

The derivatives disclosures also matter. HDFC reported ₹9,350 crore of outstanding interest rate swap exposure, while Kotak reported an interest rate swap hedging position equal to 57.84% of net assets. DSP listed a government floating-rate bond at 21.7% of the portfolio and describes using swaps to create synthetic exposure.

Swap exposure is not cash invested in derivatives or the total effective floating-rate percentage. Interpret it alongside direct floating holdings, hedged bonds and the AMC's duration methodology.

HDFC and Kotak reported direct-plan base expense ratios of 0.27% and 0.24%, respectively, for August 31. DSP disclosed a direct-plan total expense ratio of 0.28% on September 28. These are differently labelled cost measures and dates, so they should not be ranked as identical all-in charges.

HDFC and Kotak reported one-year Direct Growth annualised returns of 6.17% and 6.04%, respectively, as of August 31. These preceding-period returns cannot establish the response to October's hike or subsequent changes.

What Happens When Interest Rates Fall or Stay Unchanged?

Falling reference rates can reset floating coupons lower, while fixed-rate bonds appreciate as their locked-in payments become more attractive. Longer-duration fixed-rate funds can therefore outperform when relevant yields decline sufficiently.

Synthetic exposure can also limit that upside. A pay-fixed swap may lose value when swap rates fall, offsetting some gains in the underlying fixed-rate bonds. This is the other side of the protection sought against rising rates.

Unchanged rates leave returns dependent on income, expenses, spreads and portfolio changes, without an automatic floating-rate bonus. A repo-rate pause can still coincide with moving bond yields as inflation expectations, liquidity or borrowing conditions change.

Which Risks Can Still Cause Floating Rate Funds to Lose Money?

Credit risk remains if an issuer becomes less able to repay despite its higher coupon. Liquidity risk arises when securities cannot readily be sold at their assessed value, especially during stressed markets.

Reset delays and basis risk leave exposure to interest-rate changes, while widening market spreads can depress bond prices. Derivatives add valuation, counterparty, collateral and implementation considerations. A hedge can reduce one risk while leaving others intact.

Costs also reduce what reaches investors. The expense ratio is reflected in NAV, so a portfolio yield cannot be read as an investor's net return. These effects can produce negative NAV movements despite floating-rate exposure.

Bank floating-rate deposits follow contractual reset and withdrawal terms. RBI Floating Rate Savings Bonds are Government of India obligations linked to the NSC rate plus 35 basis points, with half-yearly resets. Mutual funds instead represent market-valued portfolios without contractual assurance of principal or income.

Who Should Consider Floating Rate Funds?

The category may suit investors seeking adjustable income exposure amid rising reference rates. Suitability still depends on the portfolio, time horizon, liquidity needs, taxation and tolerance for NAV fluctuations.

For near-term spending, potential drawdowns and redemption conditions come first. Existing debt investors should check whether a floater changes duration and issuer concentration, accounting for overlap and switching-related tax consequences.

Holding periods are scheme-specific. HDFC's September fund-positioning document indicated 3 to 12 months, while Kotak's official page indicated 2 years and above and DSP's page indicated 3 years and above. These AMC indications are not guarantees, but they demonstrate why one universal holding period is inappropriate.

What Should You Check Before Investing, Including Tax?

Read the latest factsheet for current positioning and the Scheme Information Document for permitted investments and risks. Use this checklist to interpret both.

• Portfolio composition. Separate direct floating-rate bonds, fixed-rate securities, money-market holdings and derivatives. Establish how the fund creates effective floating exposure.
• Duration and resets. Check modified duration, maturity, the underlying coupon benchmarks and reset schedules. The fund's performance benchmark index is different from a bond's coupon reference rate.
• Credit and concentration. Review rating groups, large issuer exposures and structured instruments. A floating coupon does not improve repayment quality.
• Yield and costs. Read portfolio YTM alongside credit exposure and the applicable plan's current total expenses. Distinguish BER from TER when disclosures use both.
• Access and risk. Check exit load, redemption terms, the current Riskometer and Potential Risk Class. A nil exit load does not guarantee a loss-free exit.
• Tax and acquisition date. Check when the units were acquired and which specified-mutual-fund provisions apply. Compare returns after tax, rather than headline portfolio yields.

For a resident individual, gains on qualifying debt-fund units acquired on or after April 1, 2023 are treated as short-term capital gains irrespective of holding period and generally taxed at applicable slab rates. The current provision is Section 76 of the Income-tax Act, 2025, corresponding to the earlier Section 50AA. Waiting longer does not create an indexation benefit for these units.

The specified-mutual-fund definition covers funds investing more than 65% in debt and money-market instruments, based on annual averages of daily closing figures, and qualifying funds investing in their units. Units acquired before April 1, 2023 fall outside this acquisition-date rule. For ordinary unlisted debt-fund units, the general long-term threshold is more than 24 months, with qualifying long-term gains generally taxed at 12.5% without indexation, plus applicable surcharge and cess.

The mutual fund taxation guide provides broader context, while acquisition dates and applicable law govern the outcome. Read exposure, risk and costs together because the category describes a mandate, not an entitlement to returns.

Can Floating Rate Funds Protect Returns When Rates Rise?

Floating rate funds can offer useful resilience when their reference rates rise and their income or hedges adjust effectively. That advantage is conditional on reset timing, portfolio duration, credit spreads and implementation. It does not ensure a positive return or principal protection.

The most useful factors to monitor are the underlying reference rates and resets, the fund's effective duration and swap positioning, and its credit quality after costs. Those checks explain far more than a recent return ranking. They also help determine whether floating-rate exposure addresses a real portfolio need through the next phase of the interest-rate cycle.