House Oversight and Government Reform Committee Chair James Comer launches an investigation into prediction market platforms Kalshi and Polymarket amid concerns that trading may involve non-public information. According to reporting from MSNBC, Bloomberg, and The Hill, Comer asks the companies to provide information about their safeguards against insider trading and how they monitor for suspicious or well-timed trades. The investigation centers on whether users could be using information that is not available to the general public to profit on political or economic outcomes reflected in prediction markets.
The outlets report that Comer sends letters to Kalshi CEO Tarek Mansour and Polymarket CEO Shayne Coplan seeking details about the platforms’ controls and compliance processes. Bloomberg describes the inquiry as an escalation of scrutiny of prediction markets after trades appeared to align closely with information that was potentially not public. Across the sources, the central focus is the companies’ internal policies, monitoring and reporting procedures, and any steps taken to deter or detect insider trading activity. The investigation is ongoing, with the companies expected to respond to the committee’s information requests.
