The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →A prediction market lets people trade contracts tied to future events. In a common binary contract, a “Yes” position bought for 70¢ pays $1 if its stated condition is met—30¢ gross profit before fees and taxes. If the condition is not met, the contract pays nothing and the buyer loses the 70¢. That simple example describes one contract design, not every prediction market.
How do prediction markets work?
A prediction market lists contracts whose payouts depend on a specified future event or condition. Traders place orders to buy and sell those contracts; the resulting prices change as orders interact and new information arrives. At settlement, the contract’s rules determine the outcome and payout.
Keep two things separate: the event has an outcome under the contract’s definition, while the contract has a changing market price before settlement. A price is what participants are currently willing to trade at—not the event itself, and not a promise about what will happen.
What does a 63¢ Yes price mean?
For a simple binary contract that pays $1 if the condition is true and $0 otherwise, a 63¢ price is conventionally read as an implied probability of about 63%. It is still a market price, not an objective forecast guarantee. The interpretation is less direct when a contract has multiple outcomes, partial payouts, or other non-binary terms.
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Also check which figure you are seeing. A bid is a participant’s offered purchase price; an ask is a participant’s offered sale price; a midpoint is halfway between them; and a last trade is the price of a completed transaction. Those values can differ. Kalshi Pro’s trading glossary, updated September 4, 2026, describes these order-book terms and uses a 63¢ price as an implied-probability illustration.
How much do you win if a contract pays $1?
For the illustrative 70¢ Yes contract, if the condition resolves true, the holder receives $1 at settlement. The gross profit is 30¢ per contract: $1 payout minus the 70¢ purchase price. If the condition resolves false and the contract pays $0, the buyer loses the 70¢ paid. These figures exclude fees, commissions, taxes, and other costs, which reduce net returns. The Commodity Futures Trading Commission (CFTC) uses this kind of rain-contract example in its customer guidance on prediction markets and event contracts; it is an illustration, not a live quote.
How orders, spreads, and liquidity affect the price you get
The order book shows prices and quantities participants are offering. The best bid is the highest resting buy offer; the best ask is the lowest resting sell offer. The difference between them is the spread. A wider spread can mean a bigger gap between the price at which you could sell immediately and the price at which you could buy immediately.
A market order seeks execution against available orders, but it may consume several price levels. As a result, its average execution price can differ from the first displayed quote, particularly when the order is large relative to the available depth. A limit order sets a price or better; it gives more control over price, but may not fill.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches- Volume is the number of contracts traded during a stated period.
- Open interest is the number of contracts that remain open.
- Order-book depth describes the quantities available at different prices.
These measures are related but not interchangeable. A volume figure alone does not tell you how much you can buy or sell near the displayed price.
Can you sell a contract before it resolves?
Some markets allow a holder to trade out before settlement. An early exit is a new trade at the price then available; it does not change the contract’s final settlement rule. The sale price may be higher or lower than the purchase price, and a sale depends on an executable order and an available counterparty. Trading costs can also affect the result.
Are all prediction-market contracts Yes/No?
No. The CFTC describes Yes/No contracts with fixed payouts—often $1—as common, but also notes combined Yes/No structures, defined multiple-choice outcomes, and contracts tied to ranges that can pay partially. Expiration may occur at a stated time or when the event naturally concludes, depending on the contract. More complex structures may have fewer participants and comparatively lower liquidity; that is a possibility, not a rule for every such market.
Read the individual contract terms rather than assuming a familiar format. In particular, identify the event condition, threshold, payout for each possible resolution, and the stated resolution source and process. If the event is unclear or a source changes, the applicable contingency and dispute procedure must come from that contract’s rules; there is no single settlement answer established for all markets.
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What should you compare before trading?
Compare the contract and the trading conditions, not just the headline price:
- Event and resolution: exact wording, thresholds, resolution source, decision process, and timing.
- Payoff: payout for each outcome, whether partial payouts exist, and when settlement occurs.
- Trading conditions: current bid and ask, spread, depth at relevant prices, volume over its stated period, and open interest.
- Costs: fees, commissions, taxes, and other costs that affect the amount you keep.
- Exit: whether positions can be closed early and the terms under which that can happen.
- Venue and access: applicable rules, registration, customer protections, eligibility, and jurisdiction-specific availability.
The CFTC says customers in the regulated-market framework should receive transparent contract terms, including payout, prices, and how settlement determinations are made and by whom. Its guidance also advises understanding costs and risks, reviewing contract rules, and using registered entities. Those statements describe that regulated framework; they are not a guarantee about every platform or contract.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What are the risks and limits of price-based forecasts?
A market price reflects trading among participants and can shift as orders and information change. It should not be treated as a certainty, an independently verified probability, or proof that the event will occur. The price you can actually trade at may also differ from a displayed midpoint or last trade because of the bid-ask spread, available depth, order size, and execution.
Rules and access vary by venue and jurisdiction, and a filing or general educational statement does not establish that a particular market is currently available or suitable for you. The CFTC’s customer guidance states: “All speculation involves risk.” Understand the contract, venue rules, and costs before trading.
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