Polymarket traders have decreased their bets on the likelihood of Iran's regime collapsing by March 31, with the probability now above 20%, down from around 40% following the airstrike that killed Supreme Leader Ayatollah Khamenei. The trading volume for this prediction market contract has surpassed $14 million. Contracts with later expiration dates indicate a 42% chance of regime collapse by June 30 and a 50% chance by the end of the year, with trading volumes of $5 million and $7 million, respectively. Polymarket, along with its competitor Kalshi, has recently faced scrutiny over bets related to U.S. strikes on Iran and the potential downfall of Ayatollah Khamenei.