Home › Guides › What happens when a Polymarket market is canceled?
Updated September 25, 2026 · facts checked against the dated sources listed below
Usually nothing is voided or refunded: the market still resolves under its written rules. If the event is canceled for good or the question cannot be answered, many rules send the market to a 50-50 resolution, in which each Yes share and each No share redeems for $0.50, while a postponed event usually keeps the market open until it happens.
Besides Yes and No, Polymarket's documentation lists a rare third result for when neither outcome applies: the market resolves 50-50 and each token, Yes or No, redeems for $0.50. The help center describes the same outcome as a price that resolves to 50 Yes and 50 No. Underneath, UMA's standard for yes-or-no questions reserves the value 0.5 for questions whose answer cannot be determined.
Whether you gain or lose depends on your entry price. Yes bought at 30 cents pays 50 cents a share, a 20-cent gain; Yes bought at 80 cents returns 50 cents, a 30-cent loss. Anyone holding equal numbers of Yes and No shares gets $1 per pair, as in any resolution.
See also: How Polymarket markets resolve · Market resolution
The trigger is written into each market's rules. A typical NFL game market says that a postponed game keeps the market open until the game is completed, while a game canceled entirely, or ending in a tie, with no make-up game resolves 50-50. A WTA tennis market for a match on September 24, 2026 resolves 50-50 if the match is canceled, ends in a walkover or has no winner within 14 days of the scheduled start, but goes to the player who advances if an opponent retires after play begins.
Real 50-50 results are uncommon. One example is a market on the November 15, 2024 fight between Mario Barrios and Abel Ramos: its rules sent a draw, or a fight with no official winner, to 50-50, and Polymarket's market data shows it settled with both fighters at 50 cents.
Some markets name another fallback. The 2026 Ballon d'Or market, for example, resolves to “Other” rather than 50-50 if no winner is declared by December 31, 2026.
See also: How sports game markets work · What “Other” means on Polymarket
A postponement usually leaves the market trading. Your shares stay live, and Polymarket's help center says you can sell at any point before resolution with a market or limit order. In sports markets, open limit orders are canceled automatically when the game begins, and the help center warns that start times can shift, so watch resting orders when a schedule changes.
When something unforeseen comes up after trading starts, Polymarket can publish an “Additional context” clarification. Its documentation says clarifications are posted on-chain through a bulletin-board contract, should be considered by UMA voters, and cannot change the fundamental intent of the question. When a market is clarified, the help center says, its order book is cleared and all resting orders are canceled.
Clarifications can decide large sums. After US forces captured Nicolás Maduro on January 3, 2026, Polymarket said the raid did not meet its definition of an invasion because the United States did not seize or hold territory, and its market on a US invasion of Venezuela by January 31 resolved No. In December 2025 it ruled that TIME naming the “Architects of AI” as Person of the Year did not count for its “AI” outcome, because AI itself was not named.
A proposed result can be disputed, and a second dispute sends the question to a vote of UMA token holders. In March 2025, a $7 million market on whether Ukraine would agree to a minerals deal with President Trump before April resolved Yes, although Polymarket had said it was too early to resolve; Polymarket called the situation unprecedented and said it would not issue refunds because it was not a market failure.
In July 2025, a market on whether Volodymyr Zelenskyy would wear a suit before July, with more than $160 million traded, resolved No after an initial Yes was challenged. A rare exception to the no-refund pattern came in June 2024: after UMA voters resolved a market on whether Barron Trump was involved with the DJT token to No, Polymarket said it disagreed and would refund holders of Yes shares. Its help center now says it cannot alter or reverse a resolution once UMA has finalized it.
See also: Dispute · UMA optimistic oracle
Markets can also end before their listed end date. Polymarket's help center says a market can be resolved once its result becomes clear; winning shares then pay $1, losing shares nothing, and trading stops. “By date” questions often end this way: “Maduro out by January 31, 2026?” closed on January 3, 2026, four weeks early.
Settlement is quick when nobody objects: Polymarket's documentation puts it at about two hours after a proposal, and four to six days if the result is disputed. Our resolution-time study measures how long real markets take and how often they resolve early.
See also: How long does Polymarket take to resolve? · Early resolution · How “by date” markets work
Not as a refund. The market resolves under its rules; for a canceled event that is often 50-50, which pays $0.50 per Yes or No share, so you gain or lose depending on the price you paid.
It is a rare resolution used when neither Yes nor No applies, for example a game canceled with no make-up date. Each Yes and each No share then redeems for $0.50.
Sports rules usually keep the market open until the game is completed. It resolves 50-50 only if the game is canceled with no make-up game or, in some sports, if there is no result by a stated deadline.
It can add clarifications, which its documentation says cannot change the fundamental intent of the question. A clarification clears the order book and cancels resting orders.
About two hours after an undisputed proposal and roughly four to six days if the result is disputed, according to Polymarket's documentation.
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