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A Constant maturity swap, also known as a CMS, is a swap that allows the purchaser to fix the duration (see Bond duration) of received flows on a Swap.

The floating leg of an interest rate swap typically resets against a published index. The floating leg of a Constant maturity swap fixes against a point on the Swap curve on a periodic basis.

An Interest Rates Swap where the interest rate on one leg is reset periodically but with reference to a market swap rate rather than LIBOR. The other leg of the swap is generally LIBOR but may be a fixed rate or potentially another Constant Maturity Rate. Constant Maturity Swaps can either be single currency or Cross Currency Swaps. The prime factor therefore for a Constant Maturity Swap is the shape of the forward implied yield curves. A single currency Constant Maturity Swap versus LIBOR is similar to a series of Differential Interest Rate Fix or DIRF in the same way that an Interest Rate Swap is similar to a series of Forward Rate Agreements.

A customer believes that the difference between the six-month LIBOR rate will fall relative to the three-year swap rate for a given currency. To take advantage of this, Justin buys a constant maturity swap paying the 6mths libor rate and receiving the 3yr swap rate.

• • • A way of Easy to check it (Constant Maturity Swap, CMS) ***

From: http://www.federalreserve.gov/releases/ Blow: Interest Rates and check (Interest rate swaps 13*) 13. International Swaps and Derivatives Association (ISDA®) mid-market par swap rates. Rates are for a Fixed Rate Payer in return for receiving three month LIBOR, and are based on rates collected at 11:00 a.m. Eastern time by Garban Intercapital plc [[and published on Reuters Page ISDAFIX®1.]] ISDAFIX is a registered service mark of ISDA. Source: Reuters Limited. Return to top