Kalshi is facing a lawsuit over a “death exclusion clause” in its prediction market concerning the departure of Iran's Supreme Leader, Ali Khamenei. The dispute centers on whether the platform adequately and clearly disclosed this critical clause to ordinary traders, thereby affecting the fairness of contract settlements.
According to Cointelegraph, the plaintiff alleges that Kalshi failed to prominently display the exception rule that “death does not trigger a Yes settlement” in the user interface's summary description. This led traders to generally expect that any departure of Khamenei—whether due to resignation, illness, or assassination—would be considered a “successful” contract and receive full payout. However, according to market rules and filings with the U.S. Commodity Futures Trading Commission (CFTC), the platform explicitly excluded “death or assassination” from the settlement conditions to avoid violating federal laws prohibiting derivatives linked to violent events.
Kalshi CEO Tarek Mansour responded that the clause has been present in all official documents since the market's launch and was not modified after news of Khamenei's death circulated. The company has fully refunded all traders' net losses and fees, ensuring no one suffered a net loss. He also emphasized that Kalshi operates within the CFTC regulatory framework and strictly prohibits contracts directly linked to illegal outcomes such as death or violence.
The incident has also triggered strong reactions in political circles. U.S. Senator Chris Murphy criticized such markets as “morally bankrupt” and plans to push for legislation to comprehensively ban betting on changes in government leadership. Senators Jeff Merkley and Amy Klobuchar have also jointly proposed the “Ending Trading on Congressional Knowledge (STOCK) Act 2.0,” aimed at prohibiting public officials from participating in such platforms, further restricting the market's boundaries.
Legal scholars point out that if such cases result in conflicting rulings across different jurisdictions, they could ultimately reach the Supreme Court, becoming a key precedent in defining the compliance boundaries of prediction markets. The core of the current dispute lies in whether the clause is “clear,” which depends not only on the existence of the text but also on its visibility and comprehensibility within the trading interface.
If the court rules that Kalshi's disclosure was inadequate, it could force all prediction market platforms to redesign their rule display methods, enhance the prominence of clauses, and potentially inhibit the design of contracts involving the abnormal departure of political figures. This case may become a turning point in reshaping transparency standards in the U.S. prediction market.