The biggest trading loss of the week: $5.8 million lost on Polymarket in one day
The decentralized prediction platform Polymarket continues to astonish with the scale of financial catastrophes. A new participant has burst into the platform's anti-ranking — a trader under the pseudonym supersob, who lost nearly $5.8 million in 24 hours due to a series of erroneous bets on the outcomes of 2026 World Cup football matches. This instantly propelled him to third place on the list of the most loss-making users in Polymarket's history.
How One Day Destroyed a Portfolio
The drama unfolded around two key matches: Belgium vs. Iran and Norway vs. Senegal. Supersob placed large bets on Belgium's victory and against Norway's triumph. Reality proved ruthless: the Belgian team ended the match in a draw, while the Norwegians won convincingly. The total loss on these two positions amounted to about $5.8 million.
An additional blow came from a bet on Iraq's Asian handicap in a match against France, where the French crushed their opponent 3-0, taking another $1.53 million. As a result, within a few hours, the trader's profit chart, which had recently shown a gain of $4 million, plummeted to a critical negative.
Shocking Statistics
Currently, supersob's total negative balance stands at about $6.9 million, with a trading volume of $16.73 million and a prediction accuracy of only 25%. Out of twelve major predictions, only three turned out to be correct. In the anti-ranking, he is surpassed by only two accounts: 10xBTClong with losses of about $10 million and jdsahgf with a result of minus $7.2 million.
It is worth noting that such crashes are a direct feature of Polymarket's mechanics. Contracts here trade in a range from $0 to $1, reflecting the mathematical probability of an event. The losing side loses all contributed funds with no chance of recovery. This makes large positions with incorrect analysis absolutely catastrophic.
Expert opinion: The story of supersob is a classic example of how even promising trading on prediction platforms can turn into complete fiasco without strict risk management. Polymarket markets do not forgive overconfidence, especially when bets amount to millions of dollars. The lesson is simple: diversification and cold calculation are the only allies in this environment, where one wrong match can destroy all capital.