Comparing Bond Futures and Interest Rate Swaps for Hedging
Summary
The document examines whether shorting government bond futures or entering a payer interest rate swap is the cheaper way to hedge interest rate exposure. It compares a futures position, which may benefit from pull to par, with the stated fixed and floating cash flows of a swap, then explains why those figures alone do not establish which hedge is cheaper. The instruments may not hedge exactly the same risk, so basis exposure and the underlying asset’s asset swap spread can affect the outcome.
Practical differences also matter. Futures have implied repo, margin cash flows, contract and delivery constraints, whole-contract sizing, and possible roll risk. Bond futures can face squeezes around delivery, while swaps may require counterparty credit management and collateral arrangements. Swaps can be tailored more closely to a desired maturity and risk amount; futures may be simpler to trade and have tighter bid-ask spreads. The discussion is qualitative and does not provide a matched-DV01 comparison or transaction-cost analysis, so it does not establish a universally cheaper hedge.
Key ideas
- A valid cost comparison requires matching the underlying interest rate risk and hedge sensitivity.
- Bond futures can carry basis, implied repo, delivery squeeze, and roll risks.
- Swaps offer more flexible maturity and sizing but involve counterparty and collateral considerations.
- Margin and collateral cash flows can differ in timing and amount.
- Trading convenience and bid-ask spreads may favor futures even when swaps offer a closer risk match.
Tags
Full text
# What is the cheaper IR hedge: Futures or IRS? # What is the cheaper IR hedge: Futures or IRS? Let's take the following idea: Your objective is to hedge interest rate risk. You decide between Futures and IRS: You can sell bund futures (10Y bond equivalent): - Price 177.70 - theoretically you will earn 77.70pts due to your short and the pull to par effect Whereas a 10Y payer IRS would be c.p.: - (-0.20%) p.a. payment fix - (-0.46%) p.a. on the variable side (3M Euribor) receiving - So in sum the costs would be: ~ (-0,26%) p.a. What do you think about this? Is this the case? Are futures a more expensive way of hedging interest rate risk? What could be wrong about this very simple ceteris paribus experiment? ## Answer by David Duarte (score 2) https://quant.stackexchange.com/a/51491 I'll start by saying that if you found a cheaper way to hedge exactly the same risk, that would be arbitrage (assuming transaction costs don't invalidade the opposite position) Without going into the numbers, although the pull to par effect is not very relevant here, you will always have basis risk so you can't really tell beforehand which is the best option. For the bund it's less of a problem because its very liquid but check what happens with Italy futures at some delivery dates. Sometimes there is a big squeeze. Then, the future has an implied repo rate for your initial price and you have margins. For the IRS you would probably have a CSA. What is your underlying risk? Depending on that you will also have the asset swap to worry about if you choose one instead of the other. Additionally, when choosing your option you would choose the appropriate dv01 in either case and the appropriate maturity. Futures will be less flexible because you only have a certain number of contracts (Schatz, Bobl, Bund, etc), certain settlement months and you will have to trade a whole number of contracts. Not only can you have the need to trade more than one future to avoid curve risk, you might also have to roll your position which is an additional variable. In this sense, the IRS is more flexible because you can match your risk more closely. However, it's probably easier to trade futures, because for the IRS you will need an ISDA and CSA, and bid ask will probably be wider. ## Answer by ThatDataGuy (score 0) https://quant.stackexchange.com/a/53412 The bund, boble and schatz futures can and have been subject to some big squeezes. Certain banks were famous for cornering the supply of the bonds and in some cases might have got into trouble for market manipulation IIRC. However, when trading IRS you obviously have the relevant credit risk of entering into a long term contract with the counterparty, even if you intend to offset the risk by exiting or offseting the risk with another bank. You also might have different daily cash flows wrt to variation margin vs collateral calls. As usual, its one thing to compute therectical arbritrage, but quite another to execute it.
Shown in full with attribution under the source's licence. Licence: CC BY-SA 4.0 (Stack Exchange)
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.