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 acquired YES shares for 40 cents. The event has concluded. What happens next? Grasping how prediction markets resolve matters enormously — because the settlement mechanism dictates whether and when your winnings arrive. This guide covers everything you should understand.
The resolution process on Polymarket
Polymarket employs the UMA (Universal Market Access) Oracle for decentralised settlement:
- Event occurs: The real-world event concludes (election results are announced, match ends, information becomes public)
- Proposal: A "proposer" forwards the result to the UMA Oracle, putting down a bond (denominated in UMA tokens)
- Challenge window: A 2-hour interval during which anyone may contest the submitted result by depositing a counter-bond
- If undisputed: The submitted result stands as binding. Successful shares yield $1.00; unsuccessful shares yield $0.00
- If disputed: UMA token holders cast votes to determine the accurate result. This process spans 24-48 hours
- Payout: USDC gets automatically transferred to holders of winning shares
Resolution sources
Each Polymarket market designates its resolution source in advance. Typical sources comprise:
- Official government data: Electoral outcomes from state secretaries, Bureau of Labor Statistics economic data
- News wire services: Associated Press, Reuters for event conclusions
- Price feeds: CoinGecko, CoinMarketCap for cryptocurrency price thresholds
- Sports authorities: FIFA, UEFA, National Football League for athletic results
- Scientific publications: Peer-reviewed journals or official agency statements for scientific markets
Edge cases and ambiguity
Not all markets reach straightforward conclusions. Frequent complications arise from:
- Ambiguous wording: "Will X happen by 2026?" — interpreted as by January 1 or December 31?
- Event cancellation: What occurs if a planned event gets postponed with no rescheduled date?
- Partial outcomes: A proposal advances through one chamber but fails in another — how does "Will Congress pass X?" conclude?
Polymarket mitigates these through explicit resolution guidelines embedded in each market's description. Always examine the detailed terms before participating.
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 guidelines before trading — unclear specifications raise settlement uncertainty
- Keep watch on the UMA dispute dashboard for markets under challenge
- Include settlement duration in your profit projections (a 10% return across 6 months translates to roughly 20% on an annual basis)
Trade markets featuring transparent resolution guidelines on PolyGram. Start trading on PolyGram →