What Is Polymarket and How Does It Work? The Complete Beginner Explanation
Polymarket is a prediction market: a trading venue where you buy and sell shares on whether real events will happen — elections, Fed decisions, sports, crypto prices. A share costs between 1¢ and 99¢, and the price is the probability: a contract at 65¢ means the market prices the event at 65% likely. If the event happens, every YES share redeems at exactly $1.00; if it doesn’t, at $0.00. That’s the whole game — everything else is detail worth knowing before your first trade.
What is Polymarket in simple terms?
A stock market where the “stocks” are questions. Instead of buying a company, you buy “Will X happen by Y date?” — YES if you think it will, NO if you think it won’t. Prices move as traders digest news, exactly like equities move on earnings. Two structural differences from stocks: outcomes are binary (the contract pays $1/$0, not “whatever the price is when you sell”), and the venue is non-custodial — you trade from your own wallet on Polygon, no broker holds your money. The vocabulary primer is in the glossary.
How a trade works, end to end
- Fund a wallet. Deposit (typically USDC/pUSD) to your Polymarket deposit address on Polygon — the mechanics and current collateral are in pUSD deposits.
- Pick a market. Read the resolution criteria before trading — the written rules decide outcomes, not headlines (see how resolution works).
- Read the book. The card price is the last trade; the order book’s bid/ask and depth decide what your fill costs — see the order book guide.
- Buy YES or NO. Buying NO at 40¢ is the same bet as buying YES at 60¢, just the other side of it. Multi-outcome events use negative-risk mechanics.
- Exit or hold. Sell any time at the current price, or hold to resolution and redeem $1.00/$0.00.
- Withdraw. Redeem wins, mind the floor and locked capital — see what you can actually withdraw.
What you can trade
Three families: event markets (binary questions that resolve to $1/$0), multi-outcome events (elections with many candidates — handled via neg-risk baskets), and since April 2026, perps — continuous leveraged contracts on crypto, indices, and commodities with funding and liquidation instead of resolution (see perps explained). The families behave differently; the biggest beginner mistake is treating perps like event markets or vice versa — see perps vs prediction markets.
Where you can use it
Jurisdiction decides the product: the global platform serves non-US users; the regulated US app (CFTC oversight, KYC) serves Americans — perps are global-only, and order placement from the US on the global side is prohibited. The full rules and state-level wrinkles: is Polymarket legal in the US.
FAQ
What is Polymarket and how does it work? A prediction market on Polygon where prices are probabilities: buy YES or NO shares on real events at 1-99¢, hold to resolution for $1.00 (YES wins) or $0.00, or sell earlier at the market price. Non-custodial — you trade from your own wallet.
Is Polymarket like betting? Mechanically adjacent (binary outcomes, real money) but structured as trading: you can exit any time at market price, prices are continuous probabilities rather than fixed odds, and there’s no house — you trade against other participants. See markets vs sportsbooks.
Do you need a wallet to use Polymarket? Yes — it’s non-custodial. The platform provides an embedded wallet option for convenience, but the underlying rails are your own Polygon address; deposits and withdrawals are on-chain transactions. Wallet security matters: see the 10-step hardening guide.
Can you lose more than you invest on Polymarket? On event markets, no — a share’s worst case is $0.00. On perps, yes: leverage means losses can exceed margin through liquidation mechanics — see liquidation math.
How does Polymarket make money? Primarily through trading fees and spread economics on its venues — you pay costs per trade (the current structure is in the fees guide), not for deposits or account holding.
Is Polymarket legit and safe? The contracts and settlement are audited on-chain infrastructure, and the US side is CFTC-regulated — but “safe” depends on your wallet hygiene: most losses to fraud come from phishing and approvals, not the platform — see the security review.
Educational content, not financial advice. Not affiliated with Polymarket. Last updated October 2026.