TLDR
- Two traders sued Polymarket over the settlement of a Strategy Bitcoin prediction market.
- The lawsuit claims Strategy sold Bitcoin before the market deadline despite a later public disclosure.
- Plaintiffs argue Polymarket changed its market rules after trading had already ended.
- The case alleges breach of contract and deceptive business practices against Polymarket.
- The legal dispute could influence how decentralized prediction markets resolve future contracts.
Two traders have filed a lawsuit against Polymarket over a disputed market tied to Strategy’s recent Bitcoin sale. They claim Polymarket ignored the market’s original terms and settled the contract incorrectly. The case now tests how prediction platforms should resolve markets when public confirmation arrives after an event.
Lawsuit Challenges Market Resolution
The lawsuit focuses on a Polymarket contract about Strategy selling Bitcoin before May 31. The market asked whether Strategy would complete any Bitcoin sale before that deadline. However, Strategy disclosed the transaction through an SEC filing on June 1.
This is a hell of a lawsuit.
It isn't just about one disputed market. It's really about whether prediction markets can market themselves as objective, rules-based systems while retaining broad discretion over how those rules are ultimately applied.
The biggest legal fight isn't… https://t.co/rrzMAwtWTJ
— Thomas Braziel (@Bkclaims) July 7, 2026
The filing showed Strategy sold 32 Bitcoin worth about $2.5 million between May 26 and May 31. Therefore, the transaction happened before the deadline despite later public disclosure. Still, Polymarket proposed resolving the market as “No” because confirmation arrived after expiration.
UMA token holders supported that outcome during the dispute process. Consequently, Polymarket finalized the contract with a “No” resolution. That decision erased most of the value held by traders supporting the “Yes” outcome.
The plaintiffs argue Polymarket breached its contract through that settlement decision. They say the market originally focused on whether Strategy completed a Bitcoin sale. They also claim later guidance changed the market’s meaning after trading had already ended.
Traders Claim Rule Changes and Financial Losses
According to the lawsuit, Polymarket later added language about confirmation timing. The added wording stated that confirmation outside the market period would not qualify. The traders argue Polymarket introduced that requirement after participants placed their positions.
One plaintiff said, “I was just scammed,” after reporting losses near $500,000. He claims Polymarket caused those losses through the disputed settlement decision. The lawsuit also alleges deceptive business practices and false advertising against Polymarket.
The plaintiffs argue Polymarket promoted clear and neutral market rules before accepting trades. They claim the platform later relied on internal interpretations instead of actual events. They also challenge the platform’s use of SEC filings and onchain data during settlement.
Legal Dispute May Shape Prediction Markets
The lawsuit argues prediction contracts should reflect real-world events instead of delayed public announcements. The traders maintain Strategy completed the Bitcoin sale before the stated deadline. Therefore, they believe Polymarket should have resolved the market with a “Yes” outcome.
Galaxy researchers have previously discussed similar risks involving decentralized prediction markets. They said markets may begin pricing platform interpretations instead of actual events. That concern now appears central to the dispute involving Polymarket.
Legal experts continue following the case because its outcome could influence future market designs. The decision may also affect how Polymarket writes and interprets contract terms. Meanwhile, the lawsuit places Polymarket’s settlement process under broader legal and industry examination.
