The plain-English explanation: what prediction markets are, how Polymarket turns opinions into prices, and why those prices are worth watching — whether or not you ever place a trade.
Polymarket is a prediction market: a marketplace where people buy and sell shares tied to real-world events. Every market asks a yes-or-no question — "Will the Federal Reserve cut interest rates in June?" — and the price of a "Yes" share reflects what the crowd collectively believes the odds are. If Yes trades at 70¢, the market is saying there's roughly a 70% chance the event happens.
When the event resolves, winning shares pay out $1.00 each and losing shares pay nothing. Buy Yes at 70¢ and you're right, you collect $1.00 — a 30¢ profit per share. Buy at 70¢ and you're wrong, you lose the 70¢. That simple mechanic is the entire game.
The idea rests on something called the wisdom of crowds: when many people with different information all put money behind their beliefs, the resulting price tends to be a sharper forecast than any single expert's opinion. A political analyst might be brilliant but biased; a market blends thousands of analysts, insiders, data nerds, and partisans into one number.
Unlike a poll, which asks people what they think, a prediction market asks people to back their beliefs with money. That financial stake is the difference — it punishes loud-but-wrong opinions and rewards quiet accuracy. Over time, prices in liquid markets have often matched or beaten professional forecasters, which is why journalists and researchers increasingly cite them.
Every market has two sides:
Prices always sit between 1¢ and 99¢, and Yes + No prices roughly add up to $1.00. That constraint is what makes the price readable as a probability: a Yes price of 25¢ means the crowd gives the event about a one-in-four chance. See our trading basics guide for how orders, spreads, and the order book work in practice.
Prices move for one reason: new information. A market asking who will win an election might sit at 55¢ for weeks, then jump to 68¢ after a strong debate performance or a surprising poll. Nothing about the mechanics changed — the crowd just updated its beliefs.
This is also why prices can move before the news reaches you. People with early information trade on it, and their buying pushes the price. Watching a price drift without an obvious headline is often a signal that someone knows something — though it can also just be noise or a single large trader. Never treat a price move as proof.
Polymarket is not a sportsbook — there's no house setting odds and taking the other side of your bet. You trade against other users through an order book, more like a stock exchange. It's not a poll either — polls measure opinions, markets measure opinions weighted by conviction and money. And it's definitely not a way to make easy money: most active traders underperform, and the crowd you're betting against includes professionals.
Browse the live markets and see the prices for yourself — watching is free and teaches you more than any guide.
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