Interest Rate Swap vs FRA: Managing Rate Risk

Key Takeaways

• A forward rate agreement (FRA) is a single cash settlement on one future interest period, paid at the start of that period on a discounted basis.
• An interest rate swap (IRS) exchanges fixed for floating rate cash flows on a notional amount over many periods, with net payments made each period.
• A swap behaves like a series of FRAs strung together, so the two tools price off the same forward rate curve.
• Use an FRA to hedge one dated exposure, such as a bond issue three months out; use a swap to convert a multiyear floating loan to fixed.

What It Is

A forward rate agreement is an over the counter contract that fixes an interest rate on a notional amount for a single future period. No principal changes hands. At settlement the two parties exchange only the difference between the agreed forward rate and the reference rate that actually sets. FRAs are quoted as "3x9" or "3x6," meaning the period begins in three months and ends in nine or six months.

An interest rate swap is an over the counter contract to exchange two streams of interest payments on the same notional, most commonly a fixed rate against a floating rate such as SOFR. Payments run over the full tenor, often two to thirty years, and net against each other on each reset date. The notional is never exchanged in a single currency swap.

The Intuition

Think of an FRA as one insurance payment for one exposure and a swap as a subscription covering the whole horizon. A treasurer who knows a large payment resets in exactly ninety days can buy a single FRA and be done. A treasurer carrying a five year floating rate loan needs protection on every reset for five years, so bundling those exposures into one swap is cleaner than negotiating twenty separate FRAs.

Because both instruments settle against the same floating rate benchmark, they draw their fair value from the identical forward rate curve. That is why a swap rate is, in effect, the level that makes a whole strip of forward rates net to zero at inception.

How It Works

An FRA settles once, at the start of the contract period. The payoff to the fixed rate buyer is:

• Notional times (reference rate minus fixed rate) times (days / 360), divided by (1 + reference rate times days / 360).

The final division discounts the payment back, because it is paid up front rather than at period end. The buyer of an FRA gains when rates rise above the agreed rate and pays when they fall below it.

A swap settles repeatedly. On each reset the floating rate is observed, and the party paying fixed either receives or pays the net of the two legs:

• Net payment = notional times (floating rate minus fixed rate) times (days / basis).

Do this for every period until maturity and you have replicated a strip of FRAs, which is the core link between the two instruments.

Worked Example

FRA. A borrower buys a 3x6 FRA on a $10,000,000 notional at a fixed rate of 4.00% covering a 90 day period, day count 90/360. At fixing the reference rate sets at 5.00%.

• Rate difference: 5.00% minus 4.00% = 1.00%.
• Raw interest: 10,000,000 times 0.01 times (90 / 360) = $25,000.
• Discount factor: 1 + 0.05 times (90 / 360) = 1.0125.
• Settlement to the buyer: 25,000 / 1.0125 = $24,691.36, paid at the start of the period.

Swap. The same borrower instead enters a two year swap on $10,000,000, paying 4.00% fixed annually and receiving floating. Floating sets at 4.50% in year one and 5.00% in year two.

• Year one net received: 10,000,000 times (4.50% minus 4.00%) = $50,000.
• Year two net received: 10,000,000 times (5.00% minus 4.00%) = $100,000.
• Total received over the swap: $150,000.

The FRA covered one period; the swap covered both. The swap is simply the two forward period exposures packaged into a single contract.

Common Mistakes

1. Forgetting the FRA discount. FRA settlement is paid at the start of the period, so it must be discounted. Skipping the divisor overstates the payment.
2. Assuming the notional is at risk. Neither instrument exchanges the notional in a single currency deal. It is only a reference figure for computing interest, so credit exposure is far smaller than the headline number.
3. Ignoring day count and reset conventions. A swap and an FRA can use different day count bases (30/360, actual/360). Mismatching them distorts every cash flow.
4. Treating the two as interchangeable for any horizon. An FRA hedges one dated exposure; forcing it to cover a multiyear loan means rolling and re-pricing repeatedly, which a single swap avoids.

Frequently Asked Questions

Q: What is the core interest rate swap vs fra difference? An FRA settles a single future interest period with one discounted payment, while an interest rate swap exchanges fixed and floating cash flows over many periods on a notional. A swap is effectively a strip of FRAs bundled together.

Q: When should I choose an FRA over a swap? Choose an FRA when your exposure is one dated event, such as a rate reset ninety days out. Choose a swap when you need to convert a multiyear floating obligation to fixed, because negotiating one contract beats stringing together many FRAs.

Q: In the interest rate swap vs fra comparison, which carries more counterparty risk? A swap generally carries more, because its exposure runs for years and its mark to market can grow large over time. An FRA settles quickly, so its window of counterparty exposure is short. Central clearing now reduces this risk for standardized contracts.

Q: Is a swap really just a series of FRAs? Close to it. A plain vanilla swap can be decomposed into a strip of forward rate agreements covering each reset period. They price off the same forward rate curve, which is why the swap rate reflects the whole strip netting to zero at inception.

Q: Does either contract exchange the notional amount? No. In a single currency interest rate swap and in an FRA, the notional is only a reference for computing interest. Just the net interest difference changes hands, which keeps credit exposure well below the notional figure.

Sources

1. Investopedia. "Forward Rate Agreement (FRA)." https://www.investopedia.com/terms/f/fra.asp
2. Investopedia. "Interest Rate Swap." https://www.investopedia.com/terms/i/interestrateswap.asp
3. ISDA. "International Swaps and Derivatives Association." https://www.isda.org/
4. BIS. "OTC Derivatives Statistics." https://www.bis.org/statistics/derstats.htm

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.