Understanding prediction markets
What is Polymarket, and how does it work?
Polymarket is a prediction market where participants trade contracts on event outcomes. What does a price of $0.63 tell us about their likelihood? Comparing these contracts with options explains what the price means, what the contract pays, and where the interpretation breaks down.
BeInOptions · Updated:
Example: one YES contract
Current price in this example
$0.63
≈ 63%
market-implied probability
YES
$1 payout
+$0.37 result
NO
$0 payout
−$0.63 result
Result for a purchase at $0.63, before fees and taxes. The 63% estimate is not a guarantee.
Polymarket in one picture
- 1
Question
- 2
YES / NO
- 3
People trade
- 4
Price changes
- 5
Event happens
- 6
Market resolves
The rules specify which source confirms the outcome. At ordinary resolution, each winning share pays $1 and the other side pays $0.
QUICK SUMMARY
The key points in 30 seconds
- Polymarket is a prediction market for clearly defined events.
- 0.63 reads as roughly a 63% market-implied probability.
- A standard winning contract settles at 1; a losing one settles at 0.
- Vanilla option payoff scales with the move beyond or below the strike.
What is Polymarket?
Polymarket turns an event question into a tradable contract. For example: will a particular event happen by Friday? An ordinary Yes/No market has shares for both answers.
A share is not stock in Polymarket. It gives no ownership rights in the company, only a claim to the payout defined by the contract.
The exact question matters: which source decides, what is the deadline, and what happens if the event is postponed? Two similar-sounding questions can therefore resolve differently.
Official website. Availability and rules depend on jurisdiction.
How are prediction-market prices set?
Buyers and sellers place orders in an order book. A trade can happen when a buying order matches a selling offer. News may lead either side to change its price. Explore supply, demand and order flow.
For example, buyers offer 62 cents and sellers ask 64 cents. The midpoint is 63 cents. That does not mean someone is selling at 63 cents.
Polymarket displays the midpoint or, with a wider gap, the last traded price. That gap is the spread. The quantity offered also matters: a displayed price does not guarantee execution for the amount you want. Source: Polymarket order-book documentation.
$0.63: Why is that read as 63%?
A YES share costs $0.63 in our example. At ordinary resolution it pays $1 if YES wins, and $0 otherwise. That gives the familiar reading: $0.63 ÷ $1 ≈ 63% market-implied probability.
Does that mean exactly a 63% chance? Not necessarily. The price shows the market’s current estimate. The true probability is still unknown.
For someone who buys one contract at $0.63 and holds it until resolution, there are two possible results:
Resolves YES
Payout: $1.00
Simplified result: payout − purchase price
$1.00 − $0.63 = +$0.37
Resolves NO
Payout: $0
Simplified result: payout − purchase price
$0 − $0.63 = −$0.63
Payout is not profit: subtract the purchase price first. This calculation is before fees and taxes. The 63% figure is neither a return nor a poll result.
The simple price reading leaves out other influences. Fees cost money, capital stays tied up, and some participants demand compensation for risk. Limited liquidity can distort the price further.
Interactive learning example
Try a Polymarket trade
Change the assumed YES price and investment. This example holds every share until ordinary resolution: YES pays $1 per share; NO pays $0.
63¢ = $0.63
$10 to $1,000.
Shares: 158.73. If YES wins: payout $158.73, profit $58.73. If NO wins: loss -$100.00.
$100.00 ÷ $0.63 ≈ 158.73 shares
Simplified calculation before fees, trading costs and taxes. Fractional shares are a calculation assumption here. The full investment buys shares at the selected price; that execution is not guaranteed. If NO wins, the entire investment is lost. No live data or trading recommendation.
The essential distinction
Polymarket vs Options: Prediction Contracts and Vanilla Options Compared
The core difference: an event contract asks whether something happens; a vanilla option also depends on how far the underlying moves beyond or below the strike.
Take one example: does a stock finish above $100? The event contract then pays $1. A call with a $100 strike also counts the distance: a final price of $105 gives $5 of intrinsic value; $120 gives $20.
Does the condition occur?
Prediction contract
Our example pays one dollar for Yes and zero for No. Exceeding the condition by a larger margin does not increase the payout. In real markets, event rules and resolution sources determine what counts as Yes.
The size matters too
Vanilla call option
At expiry, intrinsic value per underlying unit is max(price − strike, 0). The further the price rises above 100, the larger that value becomes. A put instead has intrinsic value of max(strike − price, 0).
| Final price | Prediction contract | Call: intrinsic value |
|---|---|---|
| 95 $ | 0 $ | 0 $ |
| 105 $ | 1 $ | 5 $ |
| 120 $ | 1 $ | 20 $ |
The charts show payout or intrinsic value, not profit. Their vertical scales differ. The call is shown per underlying unit, without a contract multiplier.
For profit, subtract the purchase price and costs. A call worth $5 at expiry that cost $7 to buy has lost $2 before costs. Depending on the contract, settlement uses delivery or cash.
Why is an option price not a probability?
Finishing above $100 can be equally likely in two scenarios. But the higher outcomes might be $105 in one and $120 in the other. Either satisfies the event contract; the distance makes a big difference to the call.
An option price therefore reflects the size of possible moves too. Time, volatility, interest rates and dividends also matter. Similar payouts do not imply identical contract rights, collateral or oversight. Here is how option prices work.
Comparison reference: SEC on vanilla options
What are prediction markets useful for?
They make changing expectations visible. If a price rises after news, participants are reassessing the event. That helps distinguish a surprise from something already expected.
They also encourage clear questions: what should happen, by when, and according to which source? A price can complement expertise and other data. It does not replace them or represent a population survey.
Can Polymarket be wrong?
Yes. A price reflects what people are willing to trade at now. Their estimate can be useful and still turn out wrong.
90¢ ≈ 90% market estimate
People make mistakes. Information changes, and prices can move quickly. Even a convincing-looking market price leaves room for surprises.
- Limited liquidity: an old trade price can look current. With few orders or a wide spread, even one order can move the price sharply.
- Not a vote: participants with more capital can have more influence. Access restrictions also shape which views reach the market.
- Rules decide: a headline may sound like YES while the precise contract condition is unmet. The deadline and evidence source still matter. Resolution rules.
- Events are connected: two markets can react to the same news. Their prices are then not independent confirmations. Probabilities cannot simply be added or multiplied when events overlap or use different time frames.
Regulation
Regulation and access: separate offerings
International offering
The polymarket.com offering lists geographic restrictions, including the United States.
Polymarket US
Polymarket US is operated separately by QCX LLC; the CFTC lists the entity as a registered Designated Contract Market. This implies neither worldwide access nor blanket regulatory endorsement.
Germany
The GGL states that participation in social-event bets from Germany is not permitted. The design and accessibility of a specific offering also matter. Context and sources.
US registration does not override national rules or endorse individual contracts. This context is informational, not guidance on accessing or using a platform; terms and legal conditions can change.
Primary sources, reviewed September 8, 2026: Offering terms · Geographic restrictions · CFTC register · GGL statement
Germany and the DACH region
Polymarket in Germany: access is not authorization
Can users trade from Germany?
The platform states that trading from Germany is prohibited. Its help page says market data can still be available. A reachable website therefore does not mean trading is permitted. Platform rules.
What does the German authority say?
The GGL names Polymarket in its warning dated September 5, 2025. It classifies paid social-event bets of this kind as ineligible for authorization and unlawful. GGL warning.
Is this an authorized offering in Germany?
For the social-event bets described here, the GGL’s position is no. Its FAQ explicitly distinguishes visible offerings from prohibited participation from Germany. Polymarket US registration does not replace German authorization. GGL FAQ.
What distinction matters?
On August 13, 2026, the GGL clarified that assessing a specific offering depends on its design and accessibility. If it effectively excludes participation from Germany, it is not automatically an unlawful offering in Germany. Updated GGL guidance.
Sources checked September 18, 2026. This summarizes published positions, not individual legal advice. The German assessment cannot be extended to Austria or Switzerland; each has its own rules.
From event prices to understanding options
The comparison offers a useful starting point for options: understand the payoff rule first, then the price, and only then the possible profit. Our basics guide explains rights and obligations. The chapter on long calls and puts develops the payoff profiles.
To read actual quotes, use the options chain guide. Then explore implied volatility and the Greeks to see how expected fluctuations and other inputs change option values. A model value is still not a certain forecast, and understanding a product does not make it suitable for everyone.
Frequently asked questions about Polymarket and options
What is Polymarket in simple terms?
Polymarket is a prediction-market platform. A contract refers to a defined event question. In an ordinary Yes/No market, the winning side receives one dollar per share after resolution and the other receives zero. The detailed market rules matter more than the headline alone.
Who sets prices on Polymarket?
Buyers and sellers set prices through their orders. The displayed figure may be the midpoint between buying and selling quotes. It does not guarantee that the quantity you want can trade at that price.
Does a price of 0.63 really mean a 63% probability?
With a possible $1 payout, $0.63 is read as roughly a 63% market-implied probability. This is a simplified reading of a price, not a verified likelihood. The number is neither a return nor a poll result.
What happens when a market resolves?
The stated rules and sources determine the outcome. At ordinary Yes/No resolution, the winning side pays $1 per share and the other $0. Disputes can take time; special cases follow the contract rules. A headline alone does not decide settlement.
Can Polymarket be wrong?
Yes. A price shows the market’s current estimate, not certainty. Even at a price of 90 cents, the event may not happen. New information, mistaken beliefs and limited liquidity can change prices.
How do prediction markets differ from vanilla options?
An event contract asks whether a condition occurs. A vanilla call also counts how far the final price is above the strike. More distance means more intrinsic value. That is why an option price is not a simple percentage probability.
What access restrictions apply, and what is Polymarket US?
The international platform and Polymarket US are separate offerings. The international platform restricts access from jurisdictions including the US. Polymarket US is operated by a CFTC-registered exchange. This implies neither worldwide access nor blanket regulatory endorsement. Current local rules and the applicable offering’s terms remain relevant.
Understand what an option costs
Take the next step from the payoff diagram to today’s price: intrinsic value, time value and the role of volatility, explained through examples.
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