What derivative gives the right to exchange currencies at a set rate?

A currency option gives the right to exchange currencies at a set rate. The option buyer may buy or sell the specified currency at the strike exchange rate on or before an agreed expiration date, depending on whether the contract is European- or American-style.

That right is valuable because the buyer can use the option when the market rate is unfavorable and walk away when the market rate is better. In return, the buyer pays a premium to the seller. A call option generally gives the right to buy a currency, while a put option gives the right to sell it; the exact quotation depends on which currency is treated as the underlying.

Currency options help exporters, importers, investors, and financial institutions hedge exchange-rate risk while preserving some upside. A forward contract also fixes a future rate, but it normally binds both sides to transact. A currency swap involves exchanging cash flows—often principal and interest—over time, rather than merely purchasing a one-sided right.

Options can be traded over the counter in customized forms or on organized exchanges in standardized contracts. Their pricing reflects factors such as the strike rate, time remaining, volatility, interest rates, and the currencies involved.