Mystery Polymarket trader turned $4 million into $9 million after Spain's shocking World Cup draw

A newly created Polymarket account turned approximately $4 million into $9 million by betting against Spain's performance in the World Cup, a trade that has sparked speculation about whether it was based on luck or insider information. The anonymous trader placed a series of bets on Polymarket, a decentralized prediction market, that paid out significantly when Spain drew with Morocco in the Round of 16. This substantial profit from a relatively small initial investment and a short trading history has drawn the attention of on-chain investigators. The specific bets involved predicting that Spain would not win, with the trader accumulating a large position as the match progressed and the outcome became more likely. The sheer scale of the profit, nearly doubling the initial stake, is considered an anomaly within the typical trading patterns observed on prediction markets. Investigators are examining the timing and nature of the bets to determine if there was any foreknowledge of the match's outcome, which would constitute a violation of market integrity.