Mystery Polymarket Trader Makes $5 Million on Spain’s World Cup Draw
Polymarket is a crypto prediction market settled in USDC where users trade on the outcomes of real-world events, with prices reflecting the market’s estimated probabilities. World Cup debutant Cape Verde faced defending European champion and tournament favorite Spain in its opening match of the 2026 tournament. An anonymous wallet’s large bet on the upset highlighted the risks of long-odds wagers and raised concerns about possible inside information.
On June 15, Cape Verde held Spain to a 0–0 draw in Atlanta after Polymarket had put Spain’s pre-match win probability at about 92%. The wallet, named “fishalive” and created only that month, wagered about $4 million across bets that Spain would not win and that Cape Verde would cover a 2.5-goal spread. Its funds ultimately grew to about $9 million, for a profit of roughly $5 million. After the trade came to light on June 16, on-chain investigators began examining whether the trader had access to inside information.
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The history behind this eventPolymarket Faces Scrutiny Over $200 Million in Flagged Trades
Polymarket allows traders to use crypto assets to wager on outcomes ranging from elections to economic events, with contract prices often treated as real-time measures of collective expectations. The decentralized prediction market relies heavily on transparent blockchain records and wallet activity to establish credibility, making signs of trading on nonpublic information or coordinated bets a significant test of market integrity and a potential focus for regulators.
A Bloomberg Businessweek analysis flagged about $200 million of Polymarket trading during the first half as potentially linked to insider activity. The top 1% of profitable accounts captured more than half of all gains, while over 50% of winning wallets were created within 24 hours before placing their bets. Some traders also appeared to split positions across multiple related wallets before withdrawing proceeds through Coinbase, intensifying scrutiny of the platform’s fairness.
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