'Gruesome' war bets fuel calls for crackdown on prediction markets

Stew, a 35-year-old from Montana, has enjoyed dabbling in sports bets since he downloaded the Kalshi app about 18 months ago. But just a few weeks ago, after spotting reports of elevated pizza deliveries around the Pentagon during some late-night scrolling, he made a different kind of bet - wagering $10 (£7.50) on the odds that Iran's Ayatollah Ali Khamenei would be "out" by 1 March.