By PredictQ Team // Updated: July 2026
Every market on Polymarket boils down to one question with a Yes or No answer, priced between a penny and 99 cents. That price is a probability. Everything else, the blockchain settlement, the order book, the regulated U.S. entity, is plumbing underneath that one idea, and most of it you’ll never have to touch.
Polymarket looks intimidating from the outside if your reference point is a sportsbook or a stock brokerage. It shouldn’t. Here’s how the platform actually works: what event contracts are, how pricing maps to probability, how trades execute and settle, how the U.S. and global platforms differ, and what a full trade looks like from idea to payout.
Event Contracts
Everything on Polymarket is an event contract, a financial instrument tied to a real-world question with a definite resolution. A few live examples of the format:
- Will France win the 2026 World Cup?
- Will the Fed cut rates at the September FOMC meeting?
- Will Bitcoin close above $150,000 on December 31, 2026?
- Will the Chiefs win the Super Bowl?
Each market carries a written resolution rule naming its data source. When the question can be answered definitively under that rule, the market resolves. Yes contracts pay $1.00 if the event happens; No contracts pay $1.00 if it doesn’t. The losing side pays zero.
Price Is Probability
A Yes contract trading at $0.72 means the market puts a 72% probability on the event. The matching No contract trades around $0.28, with the small gap between them being the spread.
Coming from sports betting? The conversion is direct:
- Yes at $0.72 = 72% implied = decimal odds 1.39 = moneyline -257
- Yes at $0.30 = 30% implied = decimal odds 3.33 = moneyline +233
Same information, cleaner format. Fifty-cent contracts are coin flips; ninety-cent contracts are heavy favorites.
Buying, and More Importantly, Selling
Buy Yes if you think it happens, buy No if you don’t. Simple. What sportsbooks never give you is the other half: you can sell any position at the market price before resolution.
Bought Yes at $0.40 and it’s now $0.70? Sell and bank $0.30 per contract without sweating the final outcome. Your position is liquid the entire time, and you can size up, trim, or exit as your read on the situation changes. That flexibility is the single biggest mental shift for bettors coming over, and it’s worth more than most people realize.
The Order Book
Polymarket runs a central limit order book, the same machinery as stock and futures exchanges, with matching on price-time priority. Every market shows you the best bid, the best ask, depth at each price level, and recent trade history.
The spread between best bid and best ask tells you the market’s health at a glance. Tight spread on heavy volume: efficient pricing, cheap to trade. Wide spread on a thin book: you’re paying slippage both directions, so size accordingly or place a limit and let the market come to you.
Market Orders vs. Limit Orders
Market orders execute immediately at the best available price. You get speed and certainty, and you pay the taker fee plus whatever the spread costs you.
Limit orders name your price. If the book can fill it, it fills; otherwise it rests until a counterparty shows up. Resting orders that fill make you the maker, and makers pay zero fees on Polymarket and qualify for rebates. When you’re not in a hurry, limit orders win almost every time.
Settlement on Polygon
All trading settles in USDC, a dollar-pegged stablecoin, on the Polygon blockchain, where every order, fill, and settlement is publicly verifiable. Practically, the crypto layer is invisible for most users. On the U.S. platform you fund by ACH or card, see dollar balances, and trade in dollar terms while the platform handles the rails. Global users hold USDC in their own wallets and interact with the markets directly.
When a market resolves, payouts are automatic. Yes holders get $1.00 per contract if the event happened, No holders get $1.00 if it didn’t. Resolution runs through Polymarket’s oracle system against the data source named in the rule: sports markets settle within minutes of the final whistle, economic data markets settle when the official print drops, and statement-based markets needing human verification take longer. Contested resolutions go through a dispute process, which is rare but adds time when it triggers.
U.S. vs. Global Platform
Same market mechanics, two different wrappers.
Regulation: the U.S. platform is CFTC-regulated through QCEX, the licensed exchange Polymarket acquired in 2025, with trading intermediated the way regulated derivatives are. The global platform is a permissionless on-chain protocol.
Funding: ACH and debit card in the U.S.; USDC on Polygon globally.
Custody: U.S. customer funds sit in a federally designated clearinghouse; global funds sit in audited smart contracts, non-custodial.
Identity: full KYC in the U.S.; wallet-based access globally.
Fees are identical on both: the category-based curve, with geopolitics free, sports peaking at $0.75 per 100 shares, politics at $1.00, and crypto topping out at $1.75, takers only, makers free with rebates.
Catalogs mostly overlap, though the U.S. platform excludes some markets for regulatory reasons. Neither issues a 1099-B; U.S. traders self-report on Schedule D and Form 8949.
Trading Hours
Markets run around the clock, every day. Brief scheduled maintenance windows happen occasionally on both platforms and are announced in advance. For events that trade globally, this means you can react to news at 3 a.m. on a Sunday, which sportsbooks and stock exchanges still can’t say.
A First Trade, Start to Finish
- You sign up, pass KYC, and deposit $50 by ACH.
- Browsing NFL futures, you find “Will the Chiefs win the Super Bowl?”
- You read the resolution rule: resolves Yes if the Chiefs win the championship game, per the league’s official result.
- You check the book. Best Yes ask is $0.18, volume is healthy, the spread is a cent or two.
- You form a view. Your analysis says their true odds are closer to 25%. Yes at $0.18 is cheap.
- You size it. $20 of your $50 at $0.18 buys 111 Yes contracts.
- You submit a limit order at $0.18. It fills immediately against the standing ask, which makes you the taker, and sports fees apply: 111 x 0.03 x 0.18 x 0.82, roughly $0.49. Total cost: $20.49.
- The season plays out. The Chiefs stack wins, and the contract climbs to $0.45.
- Decision time. Sell now and lock in $0.27 per contract, sell half, or ride to resolution.
- Hold through a title and your 111 contracts pay $111. Roughly $91 profit on $20 risked, and you had a live exit price every single day in between.
What Makes Polymarket Different
Liquidity, first. On major markets, Polymarket’s books are the deepest in the crypto-native prediction space, and execution quality follows depth.
The fee structure, second. Free geopolitics, near-zero fees at price extremes, and maker rebates mean a disciplined trader keeps almost all of their edge instead of feeding it back in transaction costs.
And for global users, self-custody. You can trade the markets straight from your own wallet without trusting anyone’s frontend. No other regulated-scale prediction market offers that.
Bottom Line
Polymarket works like a real financial exchange because that’s what it is: a derivatives market with a CFTC-regulated U.S. front end, deep books, and a fee model that rewards skill. The learning curve coming from a sportsbook is real and worth maybe a week of your attention.
What you get for it is the ability to trade probabilities like an asset, with exits priced fairly every minute of every day. Once you’ve traded that way, picking a side and praying feels prehistoric. Sign up HERE and see for yourself.
Disclosures: PredictQ may receive compensation when readers sign up for platforms through links on this page. Information accurate as of July 2026. Prediction market regulation is evolving and state availability may change. Event contract trading involves substantial risk and is not appropriate for all participants. This content is for informational purposes only and does not constitute financial, legal, or investment advice. Must be 18 or older. If you or someone you know has a gambling problem, call 1-800-GAMBLER.