How do prediction markets work?
By Editorial Team · Updated November 3, 2026 · How we research this
Strip away the jargon and a prediction market has three moving parts: an order book, a settlement rule, and a counterparty. Understand those three and you understand the whole machine.
The order book
This is the same structure a stock exchange uses. Some people post orders to buy or sell at a price they choose (makers). Others accept those prices to trade immediately (takers). The market price is wherever the best bid and best ask meet.
Because anyone can post an order, the price reflects the pooled judgment of everyone willing to back their opinion with money — not the opinion of a bookmaker in a back office.
The contract
Every market is a yes-or-no question with a defined resolution. The contract pays $1 if the event happens and $0 if it does not. Its price is always somewhere between those two numbers, which is what lets the price double as a probability.
If you can buy “Yes” at $0.40, the market is saying there is about a 40% chance. If you disagree and think it is really 60%, you have found what you believe is a bargain.
Settlement
When the event resolves, the outcome is determined against a written rule — usually something like “the candidate with the most certified votes” or “the team that wins in regulation time”. Every contract then settles to its final value.
The wording of that rule matters more than most people assume. A contract on “Team A wins” settles differently from “Team A wins in 90 minutes”. Disputes in this category are almost always about the wording, not the facts.
The counterparty
You are never betting against the platform. You are betting against whoever sold you the contract. The platform matches orders and runs settlement, then takes its fee.
This has one important consequence: there is no bookmaker limiting your stake or closing your account because you win. But it also means the platform does not guarantee your counterparty will be fair — the rules and the on-chain or regulated settlement mechanism are what protect you, not a promise.
Exiting early
Unlike a fixed-odds bet, you do not have to hold to the end. If the price moves in your favour before the event, you can sell and lock in a gain without the event ever resolving. This is why prices react to news in minutes: anyone holding a position can trade out of it the moment information changes.
Frequently asked questions
How do prediction markets work?
A prediction market is an order book where people trade contracts that settle at $1 or $0 depending on a real event. You buy from or sell to another user, not the house. The price at which a contract trades is the market's implied probability, and you can sell your position at any time before the event resolves.