In this guide
Key takeaway: Prediction markets resolve when a designated oracle or resolution source confirms the outcome. On Polymarket, the UMA Oracle handles settlement with a propose-dispute mechanism that prevents manipulation. Most markets settle within hours of the event outcome.
You purchased YES shares for 40 cents. The underlying event has concluded. What happens next? Grasping how prediction markets resolve matters fundamentally — because the settlement mechanism determines whether you receive your winnings and on what timeline. This guide covers everything essential to know.
The resolution process on Polymarket
Polymarket employs the UMA (Universal Market Access) Oracle for decentralised resolution:
- Event occurs: The real-world event reaches completion (election outcomes are certified, sporting events finish, relevant data becomes public)
- Proposal: A "proposer" submits what actually occurred to the UMA Oracle, putting up a bond denominated in UMA tokens as collateral
- Challenge window: A 2-hour interval during which any participant may contest the submitted outcome by posting their own counter-bond
- If undisputed: The submitted outcome becomes binding. Winning shares yield $1.00; losing shares yield $0.00
- If disputed: UMA token holders participate in voting to determine the accurate outcome. Resolution takes 24-48 hours
- Payout: USDC gets distributed automatically to those holding winning share positions
Resolution sources
Each Polymarket market identifies its resolution source in advance. Typical sources encompass:
- Official government data: Electoral outcomes from state secretaries, employment figures from the BLS
- News wire services: AP, Reuters for event-based outcomes
- Price feeds: CoinGecko, CoinMarketCap for cryptocurrency price thresholds
- Sports authorities: FIFA, UEFA, NFL for athletic competition results
- Scientific publications: Peer-reviewed studies or institutional announcements for research-focused markets
Edge cases and ambiguity
Certain markets do not resolve straightforwardly. Frequent complications involve:
- Ambiguous wording: "Will X happen by 2026?" — does this refer to 1 January or 31 December?
- Event cancellation: What occurs if a planned event gets postponed with no rescheduled date?
- Partial outcomes: A proposal advances through the House yet fails in the Senate — how should "Will Congress pass X?" conclude?
Polymarket mitigates these issues by publishing comprehensive resolution criteria within each market's specification page. Always examine the specific terms before placing trades.
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 the resolution criteria prior to investing — unclear criteria heighten settlement uncertainty
- Keep watch on the UMA dispute dashboard for markets facing challenges
- Account for settlement delays when projecting returns (a 10% gain realised over 6 months equals roughly 20% on an annual basis)
Trade markets featuring transparent resolution criteria on PolyGram. Start trading on PolyGram →