Description
An In Arrears Swap is an Interest Rate Swap where the fixing of one floating leg occurs at the end of each period, usually 0,1, or 2 business days before the payment date depending on the currency convention. This is a common variation on the vanilla Interest Rate Swap, which re-fixes the floating rate at the beginning of the period, like a conventional bank loan. In arrears Swaps are also known as Delayed Swaps.
Application
The “arrears” feature enables a company to monetize a view that short term rates will not increase to the extent implied by the yield curve. In this example, the company uses an In Arrears Swap to pay a lower margin over 6 month JPY LIBOR, by pushing their fixing rate further along the curve.
- The company will pay 6 month JPY LIBOR set in arrears plus 21bp, and receive 6 month JPY LIBOR set in advance plus 40bp – the arrears feature is thus worth 19bp per annum as an initial benefit.
- Put simply, the difference between each two consecutive 6-month JPY LIBOR forward interest rate is, on average, expected to be 19bp over the term of the swap.
- The company will benefit from this hedge if the pace of any rise in 6 month JPY LIBOR is slower than predicted by the market over ach fixing period; it will lose if the 6 month JPY LIBOR increases at a faster pace than that expected by the market on the trade date.
- The effect of the change in the fixing mechanism is particularly relevant in a steep curve environment since it can create a significant difference in the rate paid by the company (a “positive carry”) – the steeper the curve, the higher the initial (and the potential) benefit relative to a vanilla swap.
- Similarly, the benefit will usually increase with the tenor of the observation index (e.g. usually 12 month LIBOR > 6 month LIBOR > 3 month LIBOR) and with higher cap volatilities, due to higher convexity adjustment.
Variations
- An In Arrears Swap can have either two floating legs, as in this example, or one fixed leg vs an in arrears floating leg.
- Most basic interest rate derivatives can be adjusted to include an in-arrears fixing mechanism.
- “Quanto Swaps” (where the payment currency is different from the currency of the underlying index) are often structured to include an in arrears feature. This transfers some benefit from a steep curve in one market to a flatter curve in another market.


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