Polymarket Resolves Strategy Bitcoin Sale Market 'No' Over Post-Deadline Disclosure
Polymarket resolved its market on whether Strategy would sell Bitcoin in May to "No" after the company's confirmation arrived on June 1, a day after the May 31 deadline. Critics argue the platform added a post-deadline rule only after the market had closed, with more than $85 million in volume reported as affected.
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How the Market Resolved
Polymarket resolved its prediction market on whether Strategy Inc., formerly MicroStrategy, would sell Bitcoin in May 2026 to "No". The platform ruled that the company's disclosure of sales came after the May 31 deadline, even though the sales themselves took place within the window. Sources differ on the scale of the dispute: Bitcoinist reports more than $85 million in total trading volume at stake, while CryptoPotato does not give a volume figure.
Both outlets agree on the core facts. Strategy confirmed it sold 32 Bitcoin between May 26 and May 31, and an SEC filing dated June 1 confirmed the sales. CryptoPotato reports that one trader said they lost about $500,000 backing the "Yes" side. That figure comes from a single trader and has not been independently verified.
The Timing Dispute
The disagreement centers on whether the market measured the event or the announcement of the event. CryptoPotato argues that the wording of the market, "sells any of its Bitcoin by 11:59 PM ET on May 31", pointed to a transaction date, which Strategy met. Had the question referenced confirmation by that time, CryptoPotato contends, there would have been no room for interpretation. Bitcoinist frames the same dispute as a conflict between the outcome and its public confirmation.
Rule Change After Market Close
The most contested element is a clarification Polymarket added after the market closed, stating that announcements made after the deadline would not count toward resolution. According to CryptoPotato, that language did not appear in the markets opened for later time frames on the same event, which it says leaves traders open to similar misreadings. Critics argue the change altered settlement criteria after positions were taken. CryptoPotato notes that many traders entered positions on June 1, after the deadline, because the market had not yet been closed.
Implications for Prediction Markets
The dispute raises a question about how prediction markets handle events that occur before a deadline but are confirmed afterward. Prediction markets rely on participants knowing settlement criteria before they trade. Whether Polymarket's resolution was consistent with its published rules, or whether the clarification amounted to a retroactive change, is the point on which critics and the platform appear to diverge. Polymarket's full rationale, beyond the screenshot cited by CryptoPotato, is not reported in either source.
Why It Matters
For Traders
Settlement wording that ties outcomes to announcement dates can differ from the underlying event, so read resolution criteria carefully before taking positions near a deadline.
For Investors
The episode highlights counterparty and governance risk in prediction markets, which may influence how institutions weigh these venues as information or hedging tools.
For Builders
Market creators should define whether events resolve on transaction timestamps or disclosure timestamps and publish any clarifications before trading opens.
This article is for information only and is not financial advice. Read the full disclaimer.
