What's the practical difference between an FRA and a short-dated interest rate futures contract?

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AcadiFi · Accepted Answer

FRAs and short-dated interest rate futures target the same economic exposure but have different plumbing that matters for hedging accuracy.

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First, cash-flow timing. An FRA pays a single discounted amount at the start of the reference period. A futures contract marks to market daily, generating a stream of small gains and losses. This daily settlement introduces a convexity bias: futures rates tend to sit slightly above equivalent FRA rates because the futures buyer is effectively short a string of mini-options on reinvestment rates.

Second, standardization. Futures are exchange-traded with fixed notional ($1 million IMM dates) and quarterly expiries. FRAs are OTC and can be struck on any notional, any fixing date, and against any reference rate (SOFR, EURIBOR, SONIA).

Third, credit and collateral. FRAs carry bilateral counterparty risk unless cleared; futures post margin to a central clearinghouse, eliminating counterparty concerns but tying up capital.

The convexity adjustment matters when building a zero curve or hedging a multi-year position with a strip of futures. At a 5% level with moderate vol, the adjustment is a few basis points for near-dated contracts but can exceed 20 bps for contracts 3+ years out. For a short single-period hedge, the two instruments are nearly interchangeable.

What's the practical difference between an FRA and a short-dated interest rate futures contract?

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