CoinDesk
A $79 million Polymarket contract on whether Strategy (MSTR) sold any bitcoin by May 31 has fractured into a three-way dispute over timing, not facts. Strategy's own 8-K filing discloses that the firm sold 32 BTC between May 26 and May 31, dated "as of May 31, 2026, 4:00 p.m. Eastern Time" — squarely inside the market window. The 8-K itself was not filed until June 1, after the contract had already closed, and that one-day gap is now the entire argument.
Why it matters
The contract asked whether Strategy sold bitcoin "by 11:59 PM ET" on May 31, but the rules never specified whether "by" meant the trade date or the confirmation date. One camp reads the market as event-based and points to Strategy's filing naming MSTR's own disclosure as the primary resolution source — the source itself dates the sale inside the window. The opposing camp treats the deadline as a closed information window: nothing confirmed the sale before May 31 closed, and a post-deadline filing cannot reach back to retroactively satisfy it. A third, smaller group argues the rules were too ambiguous to resolve cleanly and invoked UMA's P4 "too early" mechanism, arguing the market should have stayed open until Strategy filed.
Polymarket has since added language backing the "No" reading, stating that "confirmation achieved outside of the market's time frame does not qualify." Traders repriced accordingly — the contract collapsed from 81% "Yes" during the dispute to under 1%. The sale itself is not in question; the disagreement is entirely over which timestamp governs.
Market impact
Polymarket does not cast the final vote. UMA token holders do, and the two oracles have split before — most notably in 2024, when UMA voted that Barron Trump was not involved in the DJT memecoin and Polymarket overruled the oracle, refunding "Yes" holders anyway. For now the platforms appear aligned on the "No" interpretation, but the precedent is the read worth watching: a single prediction-market contract at $79 million in notional value is large enough that the resolution mechanism — event-based versus announcement-gated — will inform how future ambiguity is priced into similar expiry-bound markets.
Frequently asked questions
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What exactly is the $79M Polymarket dispute about?
A Polymarket contract asked whether Strategy (MSTR) sold any bitcoin by May 31. Strategy's 8-K filing discloses 32 BTC sold between May 26 and May 31, but the 8-K wasn't filed until June 1 — after the market closed. The dispute is over whether the trade date or the filing date governs the deadline.
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Why are bettors split on whether the market should resolve "Yes"?
The "Yes" camp reads the contract as event-based. Strategy's own filing dates the 32 BTC sale inside the May 31 window and the rules name MSTR's disclosure as the primary resolution source. They argue the source itself confirms the sale occurred before the deadline.
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Why do others argue it must resolve "No"?
The "No" camp treats the 11:59 PM ET deadline as a closed information window. Nothing publicly confirmed a sale before May 31 closed, and a post-deadline filing cannot retroactively satisfy a deadline that has already passed. Polymarket endorsed this interpretation.
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How is UMA involved in the resolution?
Polymarket does not cast the final vote — UMA token holders do. The two oracles have split before: in 2024, UMA ruled Barron Trump wasn't involved in the DJT memecoin and Polymarket overruled the oracle, refunding "Yes" holders. The platforms are currently aligned on the "No" reading.
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How much has the contract's price moved during the dispute?
The May 31 contract collapsed from 81% "Yes" during the dispute to under 1% after Polymarket endorsed the "No" interpretation. The trade itself is uncontested; the disagreement is purely over which timestamp governs the deadline.
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