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 contracts for 40 cents each. The underlying event has concluded. What happens next? Grasping how prediction markets resolve matters significantly — because the settlement mechanism dictates whether and how quickly your winnings arrive. Here's your complete guide.
The resolution process on Polymarket
Polymarket relies on the UMA (Universal Market Access) Oracle for decentralised outcome verification:
- Event occurs: The real-world event reaches completion (electoral outcomes are officially announced, sporting contests finish, relevant information becomes public)
- Proposal: A "proposer" submits the outcome to the UMA Oracle, posting a bond denominated in UMA tokens as collateral
- Challenge window: A 2-hour interval during which participants may contest the submitted outcome by depositing their own counter-bond
- If undisputed: The submitted outcome becomes binding. Winning contracts pay $1.00; losing contracts pay $0.00
- If disputed: UMA token holders participate in a vote to determine the accurate outcome. This voting period spans 24-48 hours
- Payout: USDC transfers automatically to holders of winning contracts
Resolution sources
Each Polymarket contract specifies its resolution authority in advance. Typical authorities comprise:
- Official government data: Electoral outcomes from state officials, labour statistics from the BLS
- News wire services: AP, Reuters for event conclusions and breaking developments
- Price feeds: CoinGecko, CoinMarketCap for digital asset price thresholds
- Sports authorities: FIFA, UEFA, NFL for athletic competition results
- Scientific publications: Peer-reviewed studies or official agency statements for research-based markets
Edge cases and ambiguity
Not all markets conclude without complications. Frequent sources of dispute include:
- Ambiguous wording: "Will X happen by 2026?" — does this refer to 1 January or 31 December?
- Event cancellation: What occurs if a planned event is delayed indefinitely or cancelled?
- Partial outcomes: A proposal advances through one legislative chamber but fails in another — how does "Will Congress approve X?" conclude?
Polymarket mitigates these issues through explicit resolution parameters documented in each contract's specification. Always examine the detailed terms 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 resolution criteria prior to purchasing — unclear specifications introduce settlement uncertainty
- Track the UMA dispute dashboard to identify markets undergoing contested resolution
- Incorporate settlement delays into your yield projections (a 10% profit over 6 months translates to roughly 20% on an annualised basis)
Trade markets with transparent resolution criteria on PolyGram. Start trading on PolyGram →