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 contracts for $0.40 each. The underlying event has concluded. What happens next? Grasping how prediction markets resolve matters enormously — since the settlement mechanism dictates if and when your winnings arrive. Here is a comprehensive breakdown.
The resolution process on Polymarket
Polymarket relies on the UMA (Universal Market Access) Oracle for decentralised settlement:
- Event occurs: The real-world event reaches its conclusion (election results certified, game finishes, data published)
- Proposal: A "proposer" submits the outcome to the UMA Oracle, staking a bond (in UMA tokens)
- Challenge window: A 2-hour period where anyone can dispute the proposed outcome by posting a counter-bond
- If undisputed: The proposed outcome becomes final. Winning shares pay $1.00; losing shares pay $0.00
- If disputed: UMA token holders vote on the correct outcome. This takes 24-48 hours
- Payout: USDC is automatically distributed to winning share holders
Resolution sources
Each Polymarket market specifies its resolution source upfront. Common sources include:
- Official government data: Election results from state secretaries, BLS economic reports
- News wire services: AP, Reuters for breaking news outcomes
- Price feeds: CoinGecko, CoinMarketCap for crypto price milestones
- Sports authorities: FIFA, UEFA, NFL for sports outcomes
- Scientific publications: Peer-reviewed papers or agency announcements for science markets
Edge cases and ambiguity
Not every market resolves cleanly. Common complications include:
- Ambiguous wording: "Will X happen by 2026?" — does that mean by Jan 1 or Dec 31?
- Event cancellation: What happens if a scheduled event is postponed indefinitely?
- Partial outcomes: A bill passes the House but not the Senate — how does "Will Congress pass X?" resolve?
Polymarket addresses these with detailed resolution criteria in each market's description. Always read the fine print before trading.
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 criteria before placing trades — unclear criteria raise dispute risk
- Keep watch on the UMA dispute dashboard for markets under contention
- Include settlement duration in your profit projections (a 10% return over 6 months equals ~20% on an annualised basis)
Trade markets with clear settlement criteria on PolyGram. Start trading on PolyGram →