Floater Fund Explained: How Floating-Rate Debt Funds Handle Rate Hikes

When the RBI turns hawkish, the bond side of most portfolios takes a quiet hit, and that is exactly the moment people start asking about the floater fund. On October 7, 2026 the central bank raised the repo rate by 25 basis points to 5.50%, its first hike since February 2023, and changed its stance from “neutral” to “calibrated tightening”, as India Today reported that afternoon. A stance change like that tells the bond market more hikes are possible. So it’s a good time to understand what a floater fund actually holds, why it reacts differently to rate moves, and where it can still let you down.

We covered the equity side of that policy day in our RBI October 2026 policy wrap. This piece stays with debt.

What a floater fund is, in SEBI’s own words

India’s mutual fund categories were standardised by SEBI’s circular on categorisation and rationalisation of mutual fund schemes (SEBI/HO/IMD/DF3/CIR/P/2017/114, dated October 6, 2017). It lists Floater Fund as one of the debt scheme categories and gives it a short, strict definition:

• Scheme characteristic: a minimum of 65% of total assets in floating rate instruments.
• Type of scheme: “An open ended debt scheme predominantly investing in floating rate instruments.”

The same circular says only one scheme per category is generally permitted for each fund house (with a few listed exceptions). So when you see an AMC’s floater fund, it’s usually their only product in that bucket.

Notice what the rule doesn’t say. The 65% floor leaves up to 35% of the portfolio for the manager to use elsewhere, and SEBI’s definition says nothing about credit rating or maturity. Two floater funds can look very different under the hood, which is why the factsheet matters more than the category name.

Floating vs fixed: the one difference that matters

A normal bond pays the same coupon until maturity. If market rates rise after you buy, your bond is stuck paying the old rate, and its price falls until its yield matches what new bonds offer. That price drop is what hurts debt fund NAVs when rates climb.

A floating rate instrument works differently. The RBI’s FAQ on government securities describes Floating Rate Bonds (FRBs) as securities that “do not have a fixed coupon rate”. Instead, the coupon is reset at pre-announced intervals, such as every six months or a year. Because the income catches up with the market at every reset, the price has much less reason to fall.

Investopedia’s explainer on floating rate funds puts the main advantage plainly: lower sensitivity to interest rate changes compared with a fund holding fixed-coupon instruments. That’s the whole pitch. Everything else is detail.

A fixed-rate bond locks in today’s coupon. A floater locks in today’s formula. In a rising-rate cycle, the formula is the better thing to own.

How the government’s FRBs set their coupon

Government floaters are the cleanest place to see the mechanics, and the RBI FAQ gives two real examples.

The first is FRB 2024. It was issued on November 7, 2016 with a tenor of 8 years, so it matured on November 7, 2024. Its coupon was the average, rounded to two decimal places, of the implicit yields at the cut-off prices of the last three 182-day T-Bill auctions. For each later half-year, the rate was reset using the same three-auction average taken up to the start of that coupon period.

The second is FRB 2031, auctioned on May 4, 2018. This one uses a base rate plus a fixed spread. The base is the weighted average yield of the last three 182-day T-Bill auctions, and the spread was decided in the auction and stays fixed for the bond’s whole life.

The RBI also notes FRBs were first issued in India in September 1995, so this isn’t a new idea, just one that gets attention whenever rates turn.

Worked example: one coupon reset

Here’s an illustrative reset for a bond built like FRB 2031. The yields and spread below are hypothetical, chosen only to show the arithmetic.

• Last three 182-day T-Bill yields: 5.60%, 5.70% and 5.75%
• Average: (5.60 + 5.70 + 5.75) / 3 = 17.05 / 3 = 5.6833%, which rounds to 5.68%
• Fixed spread from the auction: 0.80 percentage points
• Annual coupon for the next period: 5.68% + 0.80% = 6.48%
• Half-yearly payment on ₹1,00,000 face value: 6.48% / 2 × ₹1,00,000 = ₹3,240

Now say the RBI hikes again and the next three T-Bill auctions clear at 5.85%, 5.90% and 5.95%. The average becomes 17.70 / 3 = 5.90%, and the new coupon is 5.90% + 0.80% = 6.70%. The half-yearly payment rises to ₹3,350. Nobody had to sell anything. The bond simply paid more.

The spread is the part that never moves. That matters later, when we talk about what can go wrong.

Worked example: the NAV hit, side by side

The cleanest way to compare price risk is modified duration. As Investopedia’s modified duration page explains, it measures how much a bond’s price changes for a 1% change in interest rates. The rough rule is: price change ≈ minus modified duration × change in yield.

Take two hypothetical portfolios, each worth ₹10,00,000, and push yields up by 0.25 percentage points, the size of the October hike.

The duration numbers are assumptions for the example, not figures from any real fund. The point is the ratio. With a reset every six months, the floater’s price only has to absorb the rate change until the next reset, so its effective duration is short even if the bond matures years later. Then the higher coupon kicks in and starts adding to returns. The fixed fund also earns a higher yield from that point on, but it books the price loss up front.

Where floater funds can still disappoint

Lower rate sensitivity isn’t the same as no risk. A few things we’d check before buying one:

1. Credit quality

Floaters aren’t limited to government paper. Investopedia notes that floating rate funds can hold corporate bonds and bank loans, that such loans can carry default risk, and that these funds span the credit spectrum, with lower-rated holdings carrying considerably higher risk. A floater full of weak issuers can lose far more on one default than it ever saves on duration. Read the rating mix in the monthly factsheet.

2. The 35% that isn’t floating

SEBI’s rule only sets the 65% floor. The rest can sit in other debt instruments, and if those are long-dated fixed bonds, the fund carries more rate risk than its name suggests. Look at the fund’s reported duration, not just its category.

3. Falling rates work against you

The reset works both ways. When the RBI cuts, coupons on floaters fall at the next reset, while a fixed-rate fund holding long bonds books price gains. Floaters are a tool for one part of the rate cycle. If you buy one right as hikes end, you may simply get lower income without the protection you were paying for.

4. A fixed spread can turn out too thin

In a bond like FRB 2031 the spread is fixed for life. If market spreads for similar paper widen later, a fixed spread that looked fair at auction now looks thin, and the bond’s price can slip even though its base rate resets. Floating protects you from changes in the benchmark, not from changes in how much extra the market demands over it.

A floater protects you from the benchmark moving. It does nothing about the borrower getting weaker or the spread getting wider.

Floater fund vs other short-term debt options

The SEBI circular also defines categories by duration, and those are the natural comparisons:

• Low Duration Fund: portfolio Macaulay duration between 6 and 12 months.
• Money Market Fund: money market instruments with maturity up to 1 year.
• Short Duration Fund: portfolio Macaulay duration between 1 and 3 years.

These funds control rate risk by keeping maturities short. A floater can hold longer-maturity paper and still keep rate risk low because the coupons reset. In practice that means a floater may earn a bit more from longer-dated credit, while a money market fund gets its safety from short maturities. Which one suits you depends on how much credit risk you’re happy to carry, not just on where you think the RBI is headed.

If bond maths is new to you, our explainer on yield to call walks through another way bond returns can differ from the headline coupon.

A quick checklist before you buy a floater fund

1. Floating share: how much of the portfolio is actually in floating rate instruments, and how far above SEBI’s 65% minimum is it?
2. Reset frequency: are the floaters reset every quarter, half-year or year? Faster resets track rates more closely.
3. Benchmark: what rate drives the resets, such as T-Bill yields for government FRBs?
4. Credit mix: what share is sovereign or AAA, and what sits lower?
5. Fund duration: does the reported modified duration match the “low rate risk” story?
6. Rate cycle: are hikes likely to continue, or is the market already pricing in cuts?

Rate cycles also spill into equities, and it’s worth sizing every position with that in mind. Our guide to risk management in trading covers the habits that keep one bad call from wrecking a portfolio, whether it’s a stock or a bond fund.

The bottom line

A floater fund is a simple idea carried out through fiddly instruments. Its coupons follow the market, so its NAV takes a smaller hit when rates rise, and its income climbs as each reset passes. After the RBI’s move to “calibrated tightening” this month, that makes it a reasonable thing to look at for the debt part of a portfolio. Just don’t confuse low rate risk with low risk. Check the credit quality, the non-floating slice and the fund’s real duration, and know that the same reset that helps you in a hiking cycle will cut your income when cuts come.

Disclaimer: This article is for information and education only and is not investment advice. The yields, spreads, durations and portfolio values in the worked examples are hypothetical and illustrative, not data for any real security or fund. Mutual fund investments are subject to market risks; read all scheme-related documents carefully, and consult a SEBI-registered adviser before making investment decisions.