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Study Flags 210,000 Suspicious Polymarket Trades With $143 Million in Profit

Researchers from Columbia Law School and the University of Haifa said suspected insider trading on Polymarket generated about $143 million from 2024 to 2026, a finding that could intensify regulatory scrutiny of prediction markets.

Summary

Researchers from Columbia Law School and the University of Haifa said suspected insider traders on Polymarket made about $143 million between 2024 and 2026. Their study identified more than 210,000 suspicious trades, including many large bullish positions placed shortly before major news events. The researchers also said Polymarket bans trading on confidential information and that the findings could draw closer regulatory attention to the blockchain-based prediction market.

Terms & Concepts
  • Polymarket: A blockchain-based prediction market where users trade on the outcomes of real-world events.
  • Prediction market: A market in which participants buy and sell contracts tied to the outcome of future events.
  • Bullish positions: Trades that profit if the price or implied probability of an outcome increases.