Polymarket's top trader 'Swiss Tony' made $12 million on sports markets
The best-performing trader on Polymarket is a pseudonymous account called 'swisstony' that has made $12 million trading on sports events, according to the Financial Times. The account holder is a sports gambler operating under the name 'Swiss Tony'. The figure illustrates how sports contracts have become a major volume driver on the CFTC-regulated prediction market platform. No further details on the trader's identity, market positions, or trading volume were provided.
The 'Swiss Tony' haul exposes where Polymarket's real trading volume lives. Sports event contracts now dominate the platform's order flow, not politics or macro. That concentration matters for risk management: a single pseudonymous gambler generating $12 million in profits implies outsized position sizes and limited visibility into who carries the other side. Polymarket's CFTC-regulated venue, that profile tests whether the exchange's surveillance and market-integrity tools can flag manipulation when the biggest players hide behind screen names.
The NBA's new information-sharing pipeline with the CFTC, set up precisely for this purpose, will face its first live test if Polymarket's sports volume keeps concentrating with anonymous whales. Regulators watching the Kalshi sports-contract litigation will note whether Polymarket's biggest winner looks like a skillful trader or a signal that the product line behaves like unregulated gambling.