A prediction market is a venue where people trade contracts tied to the outcome of a defined future event, and the price of a contract reads as the probability the market is assigning to that outcome.
Last reviewed 1 July 2025 · Educational, not advice
A prediction market, sometimes called an event market or an event contract market, lets people buy and sell contracts whose value depends on whether a clearly defined event happens. A yes contract typically pays a fixed amount, usually one dollar, if the event occurs, and nothing if it does not. Because the payout is fixed, the contract trades between one and ninety nine cents, and that price reads directly as an implied probability. A contract at thirty cents implies the market is treating the outcome as roughly a thirty percent chance, before fees.
In an exchange style prediction market there is no house. You trade with other participants, and the platform earns from fees rather than from your losses. That structure separates a prediction market from a traditional bookmaker, where a house sets the odds and takes the other side. Some venues are centralized and settle in dollars, while others are decentralized and settle on chain using an oracle to report the result. The shared idea across all of them is that a price is a live, tradable estimate of probability.
Prediction markets are used to gauge the perceived likelihood of outcomes in areas such as economics, politics, weather, technology, and entertainment. The price is informative because people are putting money behind their views, but it is not authoritative. Markets can be thin, biased, or simply wrong, and a confident price still carries a real chance of the opposite happening. The number is a reading of opinion, never a guarantee.
Legality and availability vary by region and platform, and the rules change frequently. A prediction market that is lawfully available in one place may not be in another. Anyone considering participation should check the current rules and their own eligibility first, and should treat any money put into a contract as genuinely at risk.
A contract asks whether a named economic figure will exceed a set level by a given date. It trades at forty cents. That implies a forty percent chance in the market view. If you buy at forty cents and the event happens, the contract settles at one dollar and you gain sixty cents per contract before fees. If it does not happen, the contract settles at zero and you lose the forty cents you paid.
Illustrative only. Numbers are examples, not a quote or a prediction, and exclude fees.
A prediction market price is informative, not authoritative. It can be confidently wrong, and any contract can resolve against you. 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 venue where people trade contracts tied to a defined future event. A yes contract pays a fixed amount if the event happens and nothing otherwise, so the price reads as the market implied probability of that outcome.
On an exchange style prediction market there is no house setting odds and taking the other side. You trade with other participants and the venue earns from fees. Some venues are built differently, so it is worth checking each one.
No. The price is an implied probability that reflects current trading, not a certain result. Prices can be wrong and can move sharply, and we never name a predicted winner.
It depends on where you live and the platform, and the rules change often. Check our legality hub and verify your own eligibility before participating.
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.