In this guide
Key takeaway: Prediction markets conclude when an appointed oracle or authoritative source validates the final outcome. On Polymarket, the UMA Oracle manages settlement through a propose-dispute framework designed to guard against gaming. The majority of markets finalise within hours following the event's conclusion.
You acquired YES tokens at $0.40. The event transpired. What happens next? Grasping prediction market resolution mechanics matters significantly — because the settlement framework dictates if and when your winnings arrive. Below is a complete breakdown.
The resolution process on Polymarket
Polymarket leverages the UMA (Universal Market Access) Oracle for transparent, decentralised settlement:
- Event concludes: The underlying event reaches completion (official election certification, final score announced, relevant information becomes public)
- Outcome submission: A "proposer" forwards the result to the UMA Oracle whilst posting collateral (denominated in UMA)
- Dispute period: A 2-hour window during which any participant may contest the submitted result by providing matching collateral
- If no challenge: The submitted result becomes binding. Correct shares receive $1.00; incorrect shares receive $0.00
- If challenged: UMA token holders participate in a vote to determine the accurate outcome. Resolution takes 24-48 hours
- Distribution: USDC transfers automatically to holders of winning shares
Resolution sources
Every Polymarket market declares its resolution source in advance. Typical sources comprise:
- Government-issued data: Electoral outcomes from state officials, labour statistics from the BLS
- Wire services: AP, Reuters for event confirmations
- Asset price indices: CoinGecko, CoinMarketCap for crypto market price thresholds
- Sporting bodies: FIFA, UEFA, NFL for athletic competition results
- Academic sources: Peer-reviewed research or official announcements for scientific markets
Edge cases and ambiguity
Certain markets do not resolve straightforwardly. Typical complications involve:
- Unclear language: "Will X occur before 2026?" — interpreted as before January 1st or December 31st?
- Postponement or cancellation: How does resolution proceed if an anticipated event is delayed indefinitely?
- Incomplete outcomes: Legislation advances through one chamber but fails in another — how should "Will Congress approve X?" settle?
Polymarket mitigates these risks by establishing comprehensive resolution specifications within each market listing. Always examine the terms thoroughly before committing capital.
How other platforms resolve
| Platform | Resolution method | Dispute mechanism |
| Polymarket | UMA Oracle (decentralised) | Token holder vote |
| Kalshi | Internal resolution team | CFTC-regulated appeal |
| Betfair | Betfair rules committee | Customer service appeal |
| Augur | REP token oracle | Escalating bonds + fork |
Tips for resolution-aware trading
- Examine settlement terms prior to purchasing — unclear criteria introduce unnecessary risk
- Track the UMA dispute dashboard to identify markets under contention
- Account for finalisation delays when projecting returns (a 10% profit over 6 months equals roughly 20% on an annualised basis)
Trade markets featuring transparent settlement rules on PolyGram. Start trading on PolyGram →