Prediction Markets, Explained
Updated August 7, 2026 · 8 min read
A prediction market is a marketplace where people trade contracts on the outcome of a future event. The current price of a contract moves between 0 and 100, and it reads directly as the probability the crowd assigns to that outcome. A market priced at 63 is saying "about a 63% chance."
That single number is the whole idea. Instead of arguing about whether something will happen, a prediction market asks everyone to put a stake on it, and the price where buyers and sellers meet becomes a shared, constantly updating forecast.
Key takeaways
- A prediction market prices a yes/no question about the future between 0 and 100.
- The price behaves like a probability: 75 means the crowd sees roughly a 75% chance.
- Prices move as new information arrives, so the market is a live forecast, not a one-time poll.
- You can learn the exact same skill with play-money markets, without risking cash.
How a prediction market actually works
Every market starts with a clear, resolvable question and a fixed resolution date. For example: "Will this film gross over $100M on its opening weekend?" There are two outcomes, YES and NO, and one of them will be true when the date arrives.
- A question is posed with an unambiguous rule for how it resolves.
- Traders buy YES if they think the event is underpriced, or NO if they think it is overpriced.
- Their orders push the price up or down until it settles where the crowd broadly agrees.
- When the event resolves, the winning side is worth 100 and the losing side is worth 0.
Because a correct YES contract pays out 100 and costs whatever the current price is, the price you pay is your implied probability. Pay 40 for a contract that pays 100 if you are right, and you are betting at 40% odds. This is why the price is not just a number people watch; it is the forecast itself.
Why the price is a forecast
A market aggregates what many people know. Some traders have read the polls, some follow the sport, some work in the industry, and some just have a gut feel. When they all trade against a single price, their private scraps of information get pooled into one number. This is the "wisdom of crowds" made tradable.
The idea has a long research history. The Iowa Electronic Markets, run by the University of Iowa since 1988, have repeatedly forecast election outcomes as well as or better than national polls.
Crucially, a prediction market updates in real time. A poll is a snapshot from last week; a market price reflects the last trade a second ago. When news breaks, the price moves within minutes, which makes it one of the fastest public forecasts available.
If you want the full argument for why these prices tend to be so well calibrated, read why prediction markets are accurate.
Prediction markets vs. polls, pundits, and betting
Versus polls
A poll measures opinion; a market measures expectation. A poll can tell you 48% of people support a candidate, but a market tells you the probability that candidate wins, which already folds in turnout, the electoral system, and momentum.
Versus pundits
A pundit rarely attaches a number and is rarely scored. A market forces a precise probability and keeps a track record automatically, because money changes hands when the outcome is known.
Versus sports betting
The mechanics look similar, but the intent differs. A sportsbook sets odds to balance its book and take a margin. A prediction market is designed so the price is the most accurate estimate of the truth. The goal is information, not the house edge.
What can you predict?
- Politics and elections: who wins, what margin, whether a bill passes.
- Economics: inflation prints, rate decisions, whether a company hits a target.
- Sports: match results, season awards, tournament winners.
- Culture and news: award shows, product launches, box-office numbers.
- Science and tech: model releases, launch dates, benchmark milestones.
Any question with a clear answer and a deadline can become a market. The skill you build is the same across all of them: turning messy, real-world uncertainty into a calibrated number.
Do you need real money?
No. Real-money exchanges exist, but the forecasting skill has nothing to do with the currency at stake. Play-money and "no-money" prediction games run the exact same mechanic: you take a position at a price, and you are scored on whether the crowd and the outcome prove you right.
Clutch is a free, no-money prediction game built on this idea. You predict real news and sports with in-app credits, and you can see exactly how it works before you play.
For a broader look at your options, including the real-money exchanges, see our roundup of the best prediction apps.
Frequently asked questions
- What is a prediction market in simple terms?
- It is a marketplace where people trade contracts on whether a future event will happen. The price of the contract, between 0 and 100, is the crowd’s estimated probability of that outcome.
- How is the price a probability?
- A winning contract is worth 100 and a losing one is worth 0. If a contract trades at 70, buyers are collectively willing to pay 70 for a shot at 100, which implies about a 70% chance.
- Are prediction markets the same as gambling?
- They share mechanics with betting, but their purpose is to produce an accurate forecast rather than a house margin. And you do not need real money at all: no-money games like Clutch teach the same skill with in-app credits.
- Where can I try a prediction market for free?
- Clutch is a free, no-money prediction game where you forecast real news and sports with credits instead of cash. It uses the same price-as-probability mechanic as any market.
Related guides
Try it yourself
Clutch is a free, no-money prediction game. Forecast real news and sports with in-app credits and build your track record.