- Kalshi faces legal pressure after traders challenged its Iran leader market ruling.
- Plaintiffs say the platform’s death carveout reduced payouts tied to Khamenei’s exit.
- The lawsuit may test how prediction markets handle contracts linked to violent events.
A U.S.-regulated prediction market platform faces a lawsuit after traders claimed it refused to pay winnings tied to a market predicting Iran’s Supreme Leader leaving office before March 1. The class-action lawsuit alleges Kalshi withheld payouts after the death of Ayatollah Ali Khamenei triggered expectations that the market outcome had been met.
The dispute involves more than $54 million in trading activity linked to the contract. According to a , traders believed the outcome became clear after Khamenei reportedly died during U.S.-Israeli military strikes.
Yet Kalshi settled the market in a way that reduced payouts. As a result, traders filed a lawsuit in federal court, arguing the platform changed the expected outcome.
Lawsuit Challenges Kalshi Market Resolution
The class-action complaint was filed Thursday in the U.S. District Court for the Central District of California. Plaintiffs claim Kalshi engaged in deceptive practices while settling the disputed market.
The contract asked users to predict whether Ayatollah Ali Khamenei would stop serving as Iran’s leader before March 1. Traders placed millions of dollars in bets as speculation grew around Iran’s political stability.
Soon after reports confirmed Khamenei’s death during U.S.-Israeli strikes, traders believed the prediction had succeeded. The military action followed months of U.S. troop deployments and strategic buildup across the region.
Many users expected the contracts to settle at one dollar per share. That payout would have delivered millions in winnings across the market. Instead, Kalshi applied a rule known as the “death carveout.” The clause allows the platform to settle a market using the last-traded price when the outcome arises from a person’s death.
This rule sharply reduced the value of traders’ contracts. As a result, users accused Kalshi of avoiding full payouts. Plaintiffs argued that the rule was unclear or buried in complex documentation. According to the complaint, traders believed the contract covered any reason for the leader leaving office, including death.
Traders Dispute Terms of “Death Carveout” Rule
The disagreement intensified after the platform invoked the carveout clause. Kalshi resolved the market at the final price recorded before news of Khamenei’s death appeared. That price stood below the expected payout of one dollar per contract. Consequently, traders received lower returns than anticipated.
Two plaintiffs reportedly held contracts worth about $259.84. Yet the broader market recorded more than $54 million in trading volume. Because of that scale, the lawsuit could carry large financial consequences if the court rules against Kalshi. Plaintiffs seek compensation equal to their expected winnings.
They also requested punitive damages. Lawyers said stronger penalties could discourage similar conduct in future markets. Traders claim the platform should have clearly warned users if death would invalidate a winning outcome. Instead, they say the market language suggested that any removal from office would qualify.
Debate Grows Over Prediction Market Ethics
Kalshi defended its actions and pointed to its platform rules. The company said its policies prohibit markets that allow profit from a person’s death.
Co-founder Tarek Mansour explained that the restriction protects ethical boundaries in prediction markets. According to Mansour, the rule prevents markets from resembling wagers tied to violent events.
The company also stated it reimbursed trading fees and net losses linked to the disputed contract. Kalshi said these reimbursements ensured that no trader lost money due to the settlement decision.
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Plaintiffs disagree with that explanation. They argue that refunds do not replace the full value of contracts that should have been paid out. Meanwhile, the dispute has drawn attention across the prediction-market industry. Platforms such as Kalshi allow users to trade contracts linked to elections, economic data, and geopolitical developments.
Interest in these markets has expanded rapidly since the 2024 U.S. election cycle. As trading volumes increase, regulators continue to examine how these platforms handle sensitive events. The Kalshi lawsuit raises a critical question: Should prediction markets allow speculation on political outcomes tied to violent or tragic events?
Regulators and analysts say the case exposes legal uncertainties surrounding event-based contracts. Outcomes involving war, death, or political upheaval often challenge the boundaries of prediction market rules.
