Swaption

A swaption is an option granting the right, but not obligation, to enter into an interest rate swap at a predetermined rate on a future date. Payer swaptions give the right to pay fixed/receive floating (beneficial if rates rise), while receiver swaptions give the right to receive fixed/pay floating (beneficial if rates fall). For example, a 1-year option to enter a 5-year swap at 3% fixed costs an upfront premium. If rates rise above 3%, the payer swaption holder exercises, entering an advantageous swap. Swaptions provide flexibility for uncertain future funding needs or hedging contingent exposures. Mortgage lenders use swaptions to hedge prepayment risk. Bermudan swaptions allow exercise on multiple dates, while European swaptions have single exercise dates. Pricing uses Black’s model or more sophisticated term structure models. Implied volatility from swaption prices indicates market expectations of rate volatility. The swaption market provides crucial information about future rate uncertainty. Exotic variations include cancelable swaps (embedded swaptions) and constant maturity swap options. Swaptions require careful management of Greeks (delta, gamma, vega) risk.