A type of option that gives the holder the right, but not the obligation, to purchase or sell an interest rate floor at a specific price during a predetermined period of time. A floortion combines the benefits of both an interest rate floor and an option. The only upfront cost to the holder is the premium the holder has to pay to purchase the option.

The investor who buys the right to enter into an interest rate floor will receive a payoff when the interest rate on the underlying floating-rate note falls below a certain level. If the floating rate does not fall below a certain rate, then the investor can exercise his or her right to not purchase the interest rate floor at the premium.