### What Is an Interest-Rate Derivative

An interest-rate derivative is a financial instrument with a value that increases and decreases based on movements in interest rates. Interest-rate derivatives are often used as hedges by institutional investors, banks, companies, and individuals to protect themselves against changes in market interest rates, but they can also be used to increase or refine the holder's risk profile.

### Breaking Down Interest-Rate Derivative

Interest-rate derivatives can range from simple to highly complex; they can be used to reduce or increase interest rate exposure. Among the most common types of interest-rate derivatives are interest rate swaps, caps, and floors.

### Interest Rate Swap

A plain vanilla interest rate swap is the most basic and common type of interest-rate derivative. There are two parties to a swap: party one receives a stream of interest payments based on a floating interest rate and pays a stream of interest payments based on a fixed rate. Party two receives a stream of fixed interest rate payments and pays a stream of floating rate payments. Both payment streams are based on the same notional principal, and the interest payments are netted. Through this exchange of cash flows, the two parties aim to reduce uncertainty and the threat of loss from changes in market interest rates.

A swap can also be used to increase an individual or institution's risk profile, if they choose to receive the fixed rate and pay floating. This strategy is most common with companies that have a credit rating that allows them to issue bonds at a low fixed rate but prefer to swap to a floating rate to take advantage of market movements.

### Caps and Floors

A company with a floating rate loan that does not want to swap to a fixed rate but does want some protection can buy an interest-rate cap. The cap is set at the top rate that the borrower wishes to pay; if the market moves above that level, the owner of the cap receives periodic payments based on the difference between the cap and the market rate. The premium, which is the cost of the cap, is based on how high the protection level is above the then-current market; the interest rate futures curve; and the maturity of the cap; longer periods cost more, as there is a higher chance that it will be in the money.

A company receiving a stream of floating rate payments can buy a floor to protect against declining rates. Like a cap, the price depends on the protection level and maturity. Selling, rather than buying, the cap or floor increases rate risk.

### Other Instruments

Less common interest-rate derivatives include eurostrips, which are a strip of futures on the eurocurrency deposit market; swaptions, which give the holder the right but not the obligation to enter into a swap if a given rate level is reached; and interest rate call options, which give the holder the right to receive a stream of payments based on a floating rate and then make payments based on a fixed rate.