A 70-cent price on a simple YES contract that pays $1 if the stated event occurs suggests a market-implied probability of about 70%. It is not a guarantee, and it does not mean you would earn 70 cents: a winning contract bought for $0.70 returns $1, or $0.30 gross profit before fees and taxes. First read the contract’s exact resolution terms, then check what the quoted price represents and how trades execute.
What a prediction market contract says
A prediction market contract defines a specific condition and assigns a payout to its outcome. “YES” means that the condition written in the contract is met under its resolution rules—not necessarily that the event happened in the ordinary, broad sense suggested by a headline.
Before interpreting a price, open the market details and check:
- The proposition: What precisely must happen for YES to resolve?
- The time window: What deadline or interval applies, and which time zone is used if stated?
- The evidence: Which data source or other evidence will be used to determine the result?
- The decision process: Who or what determines settlement, and which venue rulebook applies?
- Edge cases: What do the terms say about delays, revisions, cancellations, or ambiguous outcomes?
- Payoffs and costs: What does each outcome pay, and what fees or other costs may apply?
The Commodity Futures Trading Commission (CFTC) says customers are entitled to timely, transparent information about trading rules and contract terms, including payout, prices, and how, when, and by whom settlement is determined. Its consumer guide to prediction markets and event contracts recommends reviewing market-specific rules and understanding fees and other costs.
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What a contract price implies—and what it does not
For a simple binary contract that pays $1 if YES and $0 if NO, the price in cents is often used as a quick probability shorthand. A YES contract priced at $0.70 suggests an implied likelihood of about 70%; the CFTC uses a 70-cent YES and 30-cent NO example. Polymarket US gives the same 70-cent-to-about-70% interpretation, while Kalshi’s educational guide uses a 65-cent example to illustrate an implied likelihood of about 65%.
As the CFTC puts it, “A contract’s price reflects traders’ perceived probability of the event outcome.” That is a description of what the market price suggests, not proof that the event has that objective probability or that the market’s forecast is correct. The CFTC says prediction markets can sometimes forecast outcomes better than polls or other methods, but its cited consumer material gives no general accuracy rate. Treat each price as a market signal, not a promise of predictive performance.
The cents-to-percent shorthand applies most cleanly to a $1/$0 binary payout. Multi-outcome and range contracts have different payout designs; check how a contract pays before interpreting its price as a probability.
How payout differs from profit
For a $1/$0 binary contract, the amount received if you win is the payout. Your gross profit is the payout minus what you paid, before fees and taxes.
| Example position | If YES resolves | If NO resolves |
|---|---|---|
| Buy one YES contract for $0.70 | Receive $1; gross profit is $0.30 before fees and taxes. | Receive $0; lose the $0.70 paid, before considering any other costs. |
The CFTC’s example pairs 70-cent YES and 30-cent NO prices, but displayed YES and NO quotes need not add up to exactly $1 at every moment. The screen may show bids, asks, last trades, or midpoints, and market conditions, fees, and quote type affect what those numbers mean.
How quotes, liquidity, and execution affect the number
A displayed price is not always the price at which you can trade. It may be the best bid, the best ask, the most recent trade, or a midpoint between bid and ask. These values are not interchangeable: a buyer may pay the available ask, while a seller may receive the available bid. Check the order book and spread rather than assuming a chart’s last-traded price is available for your order.
Liquidity matters too. In a thin market, few orders may be available near the displayed quote, which can make a trade move the price and make it harder to exit at a desired level. The CFTC notes that complex contracts may attract fewer participants and comparatively lower liquidity. It also notes that customers may trade out before settlement at the current market price, subject to market availability.
A price change records a change in trading, not necessarily an equal change in the underlying event’s likelihood. New information, buying and selling activity, available liquidity, and costs can all influence the quote.
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How contracts settle
Settlement follows the published contract terms and the venue’s rules. The outcome that seems most natural after an event is not automatically the one the contract resolves to; the specified condition, evidence source, time window, and decision process govern.
Read the rules before trading, especially where the event may be delayed, revised, canceled, or difficult to interpret. Do not assume that one platform’s procedures or protections apply to another. If the terms leave an important scenario unclear, the price alone cannot answer how that scenario will settle.
What to compare when reading different markets
When comparing contracts or venues, compare the details that determine meaning, execution, and risk—not just the displayed probability.
- Resolution: Exact event wording, evidence source, settlement time, and decision process.
- Payout design: Binary, multi-outcome, or range-based terms, and the amount paid for each result.
- Trading conditions: Bid/ask spread, order-book depth, and whether the quote is a bid, ask, last trade, or midpoint.
- Costs: Fees and other costs that affect the actual return.
- Venue terms: Applicable rulebook, customer protections, and current eligibility requirements.
Availability, eligibility, fees, and platform features can change. Check current terms with the venue and relevant regulator rather than inferring legal availability from an example or an old listing.
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A contract can resolve against you, and the amount paid for a losing position can be lost. The CFTC advises customers to review contract rules and costs, understand the risks, and use only risk capital they can afford to lose. Its April 2026 fact sheet is general information, not individual legal or investment advice.
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