Polymarket's Anti-Record: Trader Loses $5.8 Million in 24 Hours on 2026 World Cup Bets
The top 3 biggest losers on the decentralized prediction platform Polymarket has received an unexpected addition. In just one day, a trader under the pseudonym supersob lost nearly $5.8 million, rapidly climbing to the third spot in the platform's all-time anti-ranking. The incident occurred amid a series of unsuccessful bets on matches in the group stage of the 2026 FIFA World Cup.
The key bets that led to the disaster were placed on the outcomes of the matches Belgium vs. Iran and Norway vs. Senegal. The trader bet on a victory for the Belgian national team, but the match ended in a draw. In the Norway vs. Senegal game, he bet against the Norwegians, yet they secured a confident win. These two events dealt a devastating blow to his portfolio.
Details of the Portfolio Collapse
Before the fateful day, supersob's profit chart showed a steady upward trend. At peak moments, the trader's profit reached $4 million. However, on June 23, the situation changed dramatically. Within hours, the balance plunged deep into the red.
The overall account statistics now look grim:
- Total negative balance: $6.86 million
- Total trading volume: $16.73 million
- Net return: minus 41%
- Prediction accuracy (win rate): 25%
Out of twelve major predictions, only three turned out to be correct. In total, the trader executed 5,230 trades, but it was a few large mistakes that wiped out all previous profits.
Mechanics of Losses on Polymarket
The nature of such catastrophic losses lies in the platform's mechanics. Contracts on Polymarket trade in a range from $0 to $1, reflecting the mathematical probability of an event. When the market closes, the losing side completely loses all funds invested. Large positions with incorrect analysis instantly turn into a total zero, which is exactly what happened to supersob, who risked millions of dollars.
My expert opinion: This case is a classic example of how a lack of diversification and excessive confidence in one's analysis can destroy even large capital. Polymarket is not an exchange with margin trading, but a market for binary outcomes, where a wrong prediction means a 100% loss. Traders should remember: even a high probability does not guarantee a result, and betting on a single outcome with million-dollar volumes is pure gambling, not a strategy.