How Prediction Markets Are Settled

Settlement is the moment a contract stops being an opinion and becomes a payment. Winning contracts pay $1, losing ones pay nothing, and the balance appears in your account. Everything interesting happens in how the venue decides which is which.

The resolution source

Every well-written market names its source in advance: an official scoreboard, a government statistics release, a named news agency, a company filing, a court record. The source should be specific enough that two strangers reading the rules would always reach the same answer. "As reported by the national statistics office in its first release" is a good source. "When it is widely reported" is not.

Three models

• Centralised: the platform's team resolves against the stated source. Fast and predictable, but you are trusting the operator, so its track record matters.
• Regulated exchange: resolution follows published contract specifications filed with a financial regulator, with a formal dispute procedure. Slowest and most rigid, and the most protective.
• Decentralised oracle: token holders vote on the outcome, with bonds posted and a challenge period. Transparent and censorship-resistant, but occasionally contentious on ambiguous wording.

The dispute window

Good venues leave a gap between proposing a resolution and paying out, so errors can be challenged. It is usually a few hours to a few days. If you believe a market has resolved wrongly, this window is the only practical moment to act — after payout, reversals are rare.

Edge cases that decide real money

• The event is postponed past the deadline. Does the market void, resolve NO, or extend?
• The result is later overturned on appeal. Most rules resolve on the result at the deadline and do not revisit it.
• The source stops publishing or changes methodology. Well-written contracts name a fallback.
• Two sources disagree. The named primary source wins, which is why "named" matters.
• The event technically happens but not in the manner described. This is the most common dispute of all.

Timing

Sports usually settle within minutes or hours. Economic data settles on release. Elections wait for an official declaration, which can be days after the media call. Long-running policy markets can sit unresolved for weeks past the obvious outcome — your capital stays locked the whole time.

How to protect yourself

Read the rules before trading, not after. Screenshot them; wording is occasionally clarified mid-life. Prefer venues that publish a resolution log and honour their dispute process. And if a market's payoff depends on a judgement call rather than a published number, price that ambiguity into what you are willing to pay.