How does Polymarket resolve markets?

Resolution in plain terms

Every Polymarket market is a clear yes-or-no question with a stated resolution date and a named source of truth. When the event is over, the market needs a final answer so that winning shares can pay out one dollar each and the other side can settle at zero. Polymarket does not write that answer itself. Instead it hands the question to a public, on-chain process so the rule, and the result, are inspectable by anyone.

That process runs in a predictable order:

1. The market closes at its stated time, and trading on the outcome ends.
2. An approved proposer submits the result and posts a bond as a stake on being correct.
3. A challenge window of about two hours opens, during which anyone can dispute the proposal by posting a matching bond.
4. If no one disputes, the proposal finalizes and winning shares become worth one dollar each.
5. If someone disputes, the question escalates to a vote by UMA token holders, who certify the outcome.

For the basics of what those YES and NO shares are in the first place, see what is Polymarket and how does it work.

The UMA optimistic oracle, explained

An oracle is any service that brings a real-world fact onto a blockchain. UMA's version is called optimistic because it assumes a proposed answer is correct unless someone challenges it inside the challenge window. That single design choice is why most markets resolve quickly: when the result is obvious, nobody bothers to dispute, and the proposal simply finalizes when the window closes.

The bond is the spine of the system. A proposer stakes money on being right, and a challenger has to stake an equal amount to object. Whoever turns out to be wrong forfeits that bond to the side that was right, so both roles carry a direct cost for being careless. To raise the floor on quality, newer markets restrict proposing to a whitelist of accounts with a track record of accurate proposals, rather than letting any wallet propose. These are platform parameters, so the exact bond size and proposer rules can change over time.

The resolution timeline, stage by stage

The table lays out the stages a resolution moves through, what happens at each one, who can act, and roughly how long it takes as of 2026. Figures such as the bond size and the liveness window are platform settings and can be adjusted.

What happens when a resolution is disputed

A dispute is the safety valve. When a challenger believes a proposed outcome is wrong, they post a matching bond and the question leaves the fast path. It escalates to UMA's Data Verification Mechanism, where UMA token holders read the market rules and vote on the correct result. That vote typically runs about forty-eight to ninety-six hours, which is why a contested market can sit unsettled for days while an obvious one clears in hours.

The economics are meant to keep the vote honest. The losing side of the dispute forfeits its bond to the winning side, so proposing a wrong answer or filing a frivolous challenge both cost money. Disputes are the exception rather than the rule: the large majority of markets pass through the challenge window untouched. When one does flare up, it is usually over wording or which data source counts, not over a plain factual result.

Ambiguous events and 50/50 resolutions

Not every question ends cleanly. If the underlying event is cancelled, postponed indefinitely, or genuinely ambiguous under the market's stated rules, the oracle can certify a fifty-fifty resolution. In that case every share is worth fifty cents regardless of side, so neither YES nor NO is treated as the winner. This outcome is relatively uncommon, but it is real, and it is one reason a market's resolution source and exact wording matter as much as its headline price.

A concrete market makes this easier to picture. The market on whether Belgium win the 2026 FIFA World Cup has an unambiguous source of truth, the tournament result, so its resolution should be a clean yes or no once the competition ends. A market whose wording leaves room for interpretation is the kind that can end up in a dispute or a fifty-fifty split.

Why resolution matters for reading the data

Resolution is what gives a Polymarket price its meaning. A share that will be worth exactly one dollar if an outcome happens, and nothing if it does not, is worth its probability today, which is why the price reads as an implied chance. That logic only holds if the market actually settles on the event it describes, so the resolution rule and source sit underneath every figure Cent Signals publishes. For how the price and probability connect, see how to read implied probability on Polymarket.

Because Cent Signals reads public data after the fact, the figures on the site are snapshots, and a market can resolve or be disputed between one snapshot and the next. The methodology page explains how the figures are collected and how often, and the glossary defines the terms used here. You can browse the live questions on the markets index.

Frequently asked questions