CoinDesk
A $79 million Polymarket contract on whether Strategy (MSTR) sold bitcoin by May 31 has fractured into one of the platform's most contested resolution disputes — not over whether the sale happened, but over which date governs: the trade date or the public filing date.
Strategy's own 8-K confirms it sold 32 BTC between May 26 and 31, with activity dated "as of May 31, 2026, 4:00 p.m. Eastern Time" — inside the window. The filing, however, wasn't published until June 1, one day after the market's deadline.
Why it matters
The dispute exposes a structural ambiguity in how prediction markets draft time-bounded contracts. The "Yes" camp reads the market as event-based: the sale occurred inside the window, Strategy's own filing confirms it, and the rules name MSTR disclosures as the primary resolution source. The "No" camp argues the market is effectively announcement-gated — nothing confirmed the sale before 11:59 p.m. ET on May 31, and allowing post-deadline filings to retroactively resolve markets would let any bettor hold a contract open until favorable evidence appears.
A third camp invokes UMA's P4 "too early" option, arguing the rules were too poorly drafted to resolve cleanly either way.
Market impact
Polymarket has backed the "No" reading, stating that confirmation outside the market's timeframe doesn't qualify. The May 31 contract collapsed from 81% "Yes" during the dispute to under 1%. But the final vote belongs to UMA token holders, who have previously overruled Polymarket — most notably in 2024 over the Barron Trump DJT memecoin question. For now the two appear aligned, but the outcome will set a precedent for how disclosure-lag risk is priced into future MSTR prediction markets.
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