Floater Funds — How They Actually Hedge Interest Rate Risk

Floater Funds are usually pitched with a simple promise: unlike an ordinary bond fund, whose NAV falls when interest rates rise, a Floater Fund's income adjusts with rates, cushioning it from that specific risk. The pitch is broadly true, but the mechanism behind it — and the fact that Indian Floater Funds often achieve this through derivatives rather than only through naturally floating-rate bonds — is worth understanding before assuming the category is immune to rate risk altogether.

The SEBI Mandate

Under SEBI's categorisation framework, a Floater Fund must invest a minimum of 65% of its total assets in floating rate instruments. This is the category's defining constraint — a majority of the portfolio must consist of instruments whose interest payments are not fixed for the life of the security, but instead reset periodically based on a reference benchmark.

What a Floating Rate Instrument Actually Is

A fixed-rate bond pays a coupon set at issuance that stays constant regardless of what happens to interest rates afterward — which is precisely why its market price moves inversely with rates: when rates rise, a fixed 6% coupon looks less attractive relative to newly issued bonds paying more, so the bond's price falls to compensate; when rates fall, the reverse happens.

A floating rate instrument, by contrast, has its coupon reset periodically — commonly every three or six months — to a level tied to a reference rate (historically instruments linked to MIBOR, the Mumbai Interbank Offer Rate, or increasingly to the RBI's repo rate or Treasury Bill yields) plus a fixed spread. Because the coupon itself adjusts with prevailing rates, the instrument's price is far less sensitive to interest rate movements than a comparable fixed-rate bond — the market doesn't need to reprice the bond's value downward when rates rise, because the bond's own income is already adjusting upward to match.

The Derivative Route: Converting Fixed-Rate Bonds Into Floaters

India's market for genuinely, natively floating-rate bonds is comparatively shallow relative to the fixed-rate corporate and government bond market. To meet the 65% floating-rate mandate while still accessing a broader universe of issuers, many Floater Funds use Interest Rate Swaps (IRS) to synthetically convert fixed-rate bond holdings into a floating-rate exposure.

The mechanism works like this: the fund holds a fixed-rate bond, and simultaneously enters into an interest rate swap in which it pays a fixed rate and receives a floating rate from a swap counterparty (typically a bank). The fixed-rate payments the fund makes on the swap roughly offset the fixed coupon it receives from the bond, while the floating-rate payments it receives from the swap become its effective, net income stream — synthetically replicating the economics of holding a floating-rate bond directly, without needing the specific floating-rate bond to actually exist in the market in sufficient supply.

This is a legitimate, SEBI-permitted structuring technique, and it's precisely how a meaningful share of Indian Floater Funds achieve their category-mandated floating-rate exposure. It does introduce a layer investors should be aware of: the fund's effective interest rate hedge now depends on the swap functioning as intended, and introduces counterparty risk (the risk that the swap counterparty fails to honour its side of the transaction) as a genuinely distinct, if generally small in a well-regulated market, risk factor that a fund holding only natural floating-rate bonds wouldn't carry.

What Floater Funds Do and Don't Protect Against

What They Address

A Floater Fund's structure is specifically built to reduce the NAV volatility that comes from interest rate movements — the same interest rate risk that affects fixed-rate debt funds most severely at longer durations. In a rising rate environment, a Floater Fund's income adjusts upward relatively quickly, and its price tends to hold up meaningfully better than an equivalent fixed-rate bond fund of similar credit quality and residual maturity.

What They Don't Address

Floater Funds are not immune to credit risk. The underlying issuers of floating-rate bonds (or the fixed-rate bonds being swapped into a floating profile) can still be downgraded or default, and the category's floating-rate mandate says nothing about the credit quality of the issuers held. A Floater Fund can, in principle, hold lower-rated paper just as a Credit Risk Fund does — checking the fund's actual credit quality breakdown remains essential, independent of its floating-rate structure.

They also don't eliminate interest rate risk entirely — they reduce sensitivity, not eliminate it. There is typically a reset lag between when market rates move and when a given floating instrument's coupon actually resets (a bond resetting every six months doesn't adjust immediately when rates change mid-cycle), which means some residual price sensitivity to rate movements remains, particularly for sharp, sudden rate moves that occur between reset dates.

When Floater Funds Tend to Outperform (and Underperform)

In a rising rate environment, Floater Funds generally hold up better than comparable fixed-rate duration funds, since their income is adjusting upward alongside rates rather than being locked in at a now-below-market coupon. This is the scenario the category is specifically designed for, and it's where the "hedge against rate risk" pitch delivers most visibly.

In a falling rate environment, the same mechanism works in reverse — a Floater Fund's income declines as rates fall, whereas a fixed-rate bond fund holding longer-duration paper actually benefits from falling rates through capital appreciation on its existing, now relatively more attractive, fixed coupons. Floater Funds are not designed to be the best-performing category in a rate-cutting cycle, and investors expecting them to capture the upside of falling rates the way a long-duration fund would are misunderstanding the category's purpose.

Where Floater Funds Fit in a Portfolio

Floater Funds are best understood as a tool for investors who specifically want to reduce interest rate risk in their debt allocation — either because they hold a view that rates are more likely to rise than fall over their investment horizon, or because they simply want a debt holding whose value is less sensitive to rate-cycle timing than a duration-oriented fund. They function reasonably well as a core, moderate-duration debt holding for investors who prioritise NAV stability over trying to capture gains from a falling-rate cycle.

A Practical Checklist

• Check what proportion of the portfolio is in natural floating-rate bonds versus synthetically created through interest rate swaps, and understand the resulting counterparty exposure in the latter case.
• Review the fund's credit quality breakdown independently — a floating-rate structure says nothing about issuer quality.
• Understand the reset frequency of the underlying instruments, since a longer reset lag means more residual rate sensitivity between resets.
• Recognise that Floater Funds are built to cushion against rising rates, not to maximise returns in a falling-rate environment — align the choice with your own view (or need for neutrality) on rate direction.

Conclusion

Floater Funds deliver a genuine, structurally sound reduction in interest rate sensitivity, whether through naturally resetting bonds or through interest rate swaps engineered to replicate that behaviour — but "reduced interest rate risk" is a specific, narrow benefit, not a blanket claim of safety. Understanding the mechanism, checking the credit quality of what's actually held, and matching the category to a genuine need for rate-risk reduction (rather than expecting it to also outperform in a falling-rate cycle) is what makes a Floater Fund allocation an informed one.