Contracts that pay out on real world events, priced as probabilities. Here is how they work, which platforms exist, where each is legal, and how to read a market before you ever risk a dollar.
A prediction market is an exchange where you buy and sell contracts that settle to one dollar if an event happens and nothing if it does not, so the price reads as the crowd's implied probability. This page explains the mechanics, the platform landscape, and why legality depends on where you live. It is general information, not advice.
A prediction market lets people buy and sell contracts that pay out based on whether a future event happens. The price of a contract, somewhere between zero and one dollar, reflects the crowd's implied probability of that outcome. Buy at 40 cents, and the market is saying the event has roughly a 40 percent chance.
On most regulated venues these are called event contracts. You pick a Yes side or a No side on a clearly defined question, such as whether a named economic figure lands above a threshold on a set date. If your side is correct when the market settles, each contract pays one dollar. If it is wrong, it pays nothing. The money you can lose is the price you paid, and nothing about a contract guarantees a profit.
In an exchange model there is no house betting against you. You trade against other participants, and the venue matches buyers with sellers and settles the contract against a stated rule. That structure is why a price can be read as a probability rather than a bookmaker's margin. It is also why these markets can still lose you money, because the crowd is often wrong and prices move fast.
If a contract trades at 72 cents, the market implies about a 72 percent chance of the outcome. That is a snapshot of opinion, not a forecast you should treat as certain. Prices swing as news arrives, and a market that looks settled can reverse in minutes. We never tell you what will happen or which side to take. We explain how the instrument works so you can decide for yourself, and then verify the current rules yourself before you act.
Liquidity matters too. On a deep market you can enter and exit near the quoted price. On a thin market the spread is wide and your own order can move the price against you. Reading both the price and the depth is part of understanding what you are buying.
The platform universe is small and changes quickly. Some venues are regulated in the United States as designated contract markets overseen by the Commodity Futures Trading Commission, the CFTC. Others are onchain crypto protocols that settle in stablecoins and operate outside that framework. A few run entirely on play money for forecasting practice. These are genuinely different products with different risks, custody arrangements, and legal standing.
We do not crown a single best platform, because the right venue depends on where you live, what you want to trade, and what you are eligible to use. Instead we maintain plain profiles of each platform, explain how each is funded and regulated, and show where each is genuinely available. When you are ready, our compare tool narrows the field to the platforms that are actually open to you, after you have read the information.
Whether you can use a given platform depends on your country and, in the United States, often your state. Federal oversight of event contracts has been active and contested, with the CFTC issuing guidance, withdrawing earlier proposals, and several states raising their own challenges through 2025 and 2026. Sports event contracts in particular face state by state friction. Because the picture changes often, every legality page on this site carries an as of date and a last reviewed date, and we tell you plainly where a position is contested rather than guessing.
Markets cluster into durable categories: politics and elections, economics and central bank decisions, the major American sports leagues, soccer, crypto and bitcoin prices, weather, entertainment and awards, technology and artificial intelligence, world events, and broader culture. Our category guides explain how each type defines its outcomes and where those markets tend to trade. We do not build pages for single live markets, because those expire. We build durable references you can come back to.
Use the platform profiles to see how each venue is funded and regulated, then compare only the platforms that are genuinely available where you live. We do not sell placements and we do not earn from sending you anywhere.
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Prediction markets and event contracts can lose you money. Trade only what you can afford to lose, never to chase a loss, and never with borrowed money. If participating stops feeling like a free choice, step back. In the United States you can call or text 1 800 GAMBLER or visit ncpgambling.org for free, confidential support. These markets are not a savings plan or a path to easy money.
Not exactly. On an exchange style prediction market you buy and sell contracts against other participants rather than betting against a house, and a contract price reflects an implied probability. The economic risk is similar in that you can lose what you put in, and in some places these products are regulated as derivatives rather than as gambling.
A price between zero and one dollar maps to a probability. A contract at 30 cents implies roughly a 30 percent chance of the outcome. It is the crowd's current opinion, not a guarantee, and it changes as new information arrives.
Yes. If your side is wrong at settlement, the contract pays nothing and you lose what you paid. Prices can also move against you before settlement. Only ever commit money you can afford to lose.
No. PredictionMarketIndex is an independent informational resource and is not affiliated with any platform. We explain how the products work and where they are available, and we leave the decision and the verification to you.
Never. We do not tip, tout, sell picks, or predict an outcome as certain. We provide neutral information so you can make your own informed decision and confirm the current rules yourself.