Kalshi is facing significant backlash following its handling of the “Ali Khamenei out as Supreme Leader?” prediction market after the Iranian Supreme Leader’s death in recent U.S./Israel strikes on Iran.
The core issue stems from Kalshi’s “death carveout” rule, which the platform enforces due to U.S. regulatory constraints; as a CFTC-regulated entity, it avoids markets that directly settle on death, assassination, or similar events to prevent profiting from mortality.
Kalshi offered a market on whether Khamenei would no longer be Supreme Leader by certain dates, attracting over $50-55 million in trading volume. The market rules explicitly stated: If Khamenei dies, the market resolves based on the last traded price prior to confirmed reporting of death rather than a full “Yes” payout at $1 per share.
When Khamenei’s death was confirmed Kalshi paused trading, reviewed, and settled positions at that pre-death price; reports mention around 39.5% to 68% odds at various points, not 99-100%. This meant “Yes” bettors who expected full payout as Khamenei was indeed “out” received partial payouts instead—often far less than if it had resolved to “Yes.”
Kalshi also reimbursed all fees on the market and refunded post-death purchases to the pre-death price. Kalshi CEO Tarek Mansour defended this on X, emphasizing: They don’t list direct death markets. The carveout prevents profiting from death while allowing bets on leadership changes which could occur via resignation, etc.
The market was important for geopolitical and economic implications; Many traders felt misled: The market title was broad “out as Supreme Leader”, and death clearly achieves that outcome. Critics argue the carveout was buried in fine print, leading to accusations of misleading users or even “stealing” potential winnings.
Polymarket’s similar markets resolved to “Yes” on death, paying out fully—leading to huge wins; one trader reportedly made $553k. This highlighted the disparity and fueled claims Kalshi is “rigged” or overly cautious at users’ expense. Broader outrage includes: Calls for lawsuits or legal challenges, some users threaten action over contract breach.
Accusations of poor UX/communication; Kalshi admitted they could improve rule visibility. The event amplified concerns about prediction markets on war and conflict, with some lawmakers pushing restrictions.
User frustration: “Yes” buyers at low prices got partial payouts instead of massive gains. Kalshi responded by reimbursing fees and adjusting post-death trades, but sentiment remains heated—traders call it a “scam” or “voided bets,” while defenders say rules were clear and regulations forced their hand.
This incident underscores challenges for regulated U.S. platforms like Kalshi versus offshore ones like Polymarket: stricter rules protect against controversy but can lead to user dissatisfaction when edge cases like death-driven outcomes arise.
Prediction markets continue booming; Kalshi and Polymarket saw massive volumes in February 2026 amid the Iran events, but credibility and clear resolutions are now under the spotlight.
Accusations include buried rules, poor UX (death carveout not prominent enough initially), and promotion of the market despite the edge case. Some threatened class-action lawsuits or filed CFTC complaints. Trust erosion is evident—users vow to switch to unregulated platforms like Polymarket.
As a CFTC-regulated U.S. entity, Kalshi emphasized compliance. The incident highlighted tensions between strict rules and user expectations for straightforward binary outcomes. Mansour defended the carveout publicly, noting it prevents “profiting from death” while allowing bets on leadership changes.
He committed to better highlighting such rules in future markets. The $2.2M reimbursement was a direct hit, though minor relative to overall volumes. It underscores the risks of geopolitical markets under regulation.
Kalshi paused trading, reviewed, and settled per rules.
Future markets will feature more prominent carveout disclosures to avoid similar surprises. Polymarket resolved death-linked markets to “Yes,” leading to big wins. This amplified perceptions of Kalshi as “overly cautious” or “user-unfriendly,” driving some volume and migration offshore.
The event fueled criticism of prediction markets on war/conflict/death: Ethical concerns: “Betting on assassination” or profiting from mortality.
