In this guide
Key takeaway: Prediction markets conclude when an authorised oracle or data source validates the final outcome. Polymarket relies on the UMA Oracle for settlement, employing a propose-dispute framework that guards against price manipulation. The majority of markets settle within hours following event confirmation.
You acquired YES tokens at $0.40. The event has transpired. What happens next? Grasping how prediction markets resolve matters profoundly — because the settlement mechanism establishes whether and at what point you receive your winnings. Here is the complete picture.
The resolution process on Polymarket
Polymarket employs the UMA (Universal Market Access) Oracle for decentralised outcome verification:
- Event occurs: The underlying event concludes (election results announced, sporting contest concludes, information becomes public)
- Proposal: A "proposer" submits the outcome to the UMA Oracle, committing a bond denominated in UMA tokens
- Challenge window: A 2-hour interval during which any participant may contest the submitted outcome by placing a matching counter-bond
- If undisputed: The submitted outcome becomes binding. Successful share positions yield $1.00; unsuccessful positions yield $0.00
- If disputed: UMA token holders adjudicate the correct outcome through voting. Resolution requires 24-48 hours
- Payout: USDC transfers automatically to holders of winning share positions
Resolution sources
Each Polymarket contract designates its resolution source in advance. Typical sources comprise:
- Official government data: Electoral outcomes from state administrative bodies, labour department economic statistics
- News wire services: Associated Press, Reuters for event-driven outcomes
- Price feeds: CoinGecko, CoinMarketCap for digital asset price thresholds
- Sports authorities: FIFA, UEFA, National Football League for competitive results
- Scientific publications: Peer-reviewed research or regulatory announcements for scientific markets
Edge cases and ambiguity
Certain markets do not conclude unambiguously. Recurring complications involve:
- Ambiguous wording: "Will X occur by 2026?" — does that refer to 1 January or 31 December?
- Event cancellation: What transpires if a scheduled occurrence is postponed indefinitely?
- Partial outcomes: A proposal advances in one chamber but fails in another — how does "Will Congress approve X?" conclude?
Polymarket mitigates these scenarios through comprehensive settlement specifications in each contract's documentation. Examine the terms thoroughly before initiating any position.
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 settlement specifications prior to purchasing — unclear specifications elevate settlement uncertainty
- Track the UMA dispute dashboard for contested contracts
- Incorporate settlement duration into your performance assessment (an 8% return across 6 months translates to ~16% on an annualised basis)
Engage with contracts featuring transparent settlement specifications on PolyGram. Start trading on PolyGram →