A binary option is an all or nothing contract that pays a fixed amount if a stated condition is met by expiry, and nothing if it is not.
Last reviewed 12 December 2025 · Educational, not advice
A binary option is a contract with only two possible outcomes at expiry. If the stated condition is met, for example a price or a published figure being above a set level at a set time, the contract pays a fixed amount. If the condition is not met, it pays nothing. There is no partial payout and no scaling with how far the condition was exceeded, which is what the word binary describes. The price you pay before expiry sits between the two extremes and can be read as the market implied probability of the yes outcome.
This structure is closely related to the event contracts that trade on prediction markets, which also resolve to a fixed value if a defined event happens and to zero if it does not. The terms overlap in everyday use, and many event contracts are, in form, binary options. The important distinctions in practice are where the contract trades, how it is regulated, and whether the venue is operating lawfully, rather than the payout shape itself.
In the United States the regulator position is specific. According to the CFTC, binary options may be traded lawfully only on a CFTC registered exchange, known as a Designated Contract Market. A small number of registered exchanges offer them. The CFTC and the SEC have repeatedly warned that much of the binary options activity online runs through unregistered, often offshore, internet platforms that may not comply with United States law, and that this segment has drawn a large number of fraud complaints. As of 23 June 2026 that remains the published position, but rules change, so verify the current status before acting.
The reported fraud schemes are worth knowing because they are concrete. The CFTC and SEC alerts describe platforms that refuse to credit customer accounts or reimburse funds, that manipulate trading software to generate losing trades, and that misuse personal information for identity theft. The CFTC also maintains a Registration Deficient list, the RED List, naming foreign entities that appear to require registration but are not registered. The presence of these warnings does not mean every binary option is fraudulent, it means the unregulated corner of the market carries serious, documented risk.
For anyone reading a price, the takeaway is twofold. The mechanics are simple and the same probability logic applies as with any event contract. But the legality and the legitimacy of the venue matter more than the contract shape, and an all or nothing payout combined with an unregulated platform is a well documented recipe for loss. Confirm a venue is lawful and available to you before treating any binary option as something you can trade safely.
A binary option might pay one dollar if a published figure is above a set level at expiry and nothing if it is not. If it trades at 35 cents beforehand, the market is implying roughly a 35 percent chance of yes, before fees. Buy at 35 cents and the outcome is binary, you receive one dollar if it resolves yes or you lose the 35 cents if it resolves no. There is no in between.
Illustrative only. Numbers are examples, not a quote or a prediction, and exclude fees.
An all or nothing payout means you can lose your entire stake on a single contract, and unregulated binary options platforms have drawn many documented fraud complaints. Trade only on a lawful, available venue and only with money you can afford to lose. Stake only what you can afford to lose, never to chase a loss, and never on borrowed money. If it stops feeling like a free choice, step back. In the United States you can call or text the helpline on 1-800-GAMBLER or visit ncpgambling.org.
A binary option is an all or nothing contract with two possible outcomes at expiry. If a stated condition is met it pays a fixed amount, and if it is not it pays nothing. Its price beforehand can be read as the market implied probability of the yes outcome.
According to the CFTC, binary options may be traded lawfully only on a CFTC registered exchange, a Designated Contract Market. The CFTC and SEC warn that many online, often offshore, platforms are unregistered and have drawn many fraud complaints. As of 23 June 2026 that is the published position, but rules change, so verify the current status.
They share the same all or nothing payout structure, and many event contracts are in form binary options. The meaningful differences are where the contract trades, how it is regulated, and whether the venue is lawful, rather than the payout shape itself.
The CFTC and SEC report that much binary options activity runs through unregistered platforms, with documented complaints about refused withdrawals, manipulated software that generates losing trades, and identity theft. The CFTC maintains a RED List of foreign entities that appear to require registration but are not registered.
The rules change fast. Get the changes that affect you, plain and current, not tips.
Independent. Every claim dated and sourced. No platform pays for its place.