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Polymarket Lawsuit: Traders Sue Prediction Market Over 'No' Ruling on Bitcoin Sale Bet

July 7, 2026•08:34 AM

A high-stakes legal battle has erupted against Polymarket as traders claim the platform implemented rule changes after the fact to invalidate winning bets. The lawsuit centers on a successful 'Yes' position regarding a MicroStrategy Bitcoin sale, which was abruptly overturned by a 'No' ruling.

This controversy strikes at the heart of trust in prediction markets and decentralized forecasting. The outcome of this litigation could set a massive precedent for how platforms handle dispute resolution and whether retroactive rule changes are permissible in the crypto-native betting ecosystem.

Traders are suing Polymarket, alleging that the platform added a rule after the fact, turning their winning 'Yes' bet on MicroStrategy's Bitcoin sale into a loss. The plaintiffs argue that the platform's sudden decision to rule 'No' on the outcome directly contradicts the market conditions at the time of the bet, leading to significant financial damages for those who correctly anticipated the event.

This is a summarized and adapted version by Artificial Intelligence. To read the complete original story, visit the official source.

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