Congress Investigates Polymarket and Kalshi for Potential Insider Trading

Congress is launching a major investigation into two prediction market platforms, Polymarket and Kalshi, over fears that government employees could be using classified information to make significant profits. Rep. James Comer, the chairman of the House Oversight Committee, has sent letters to the CEOs of both companies demanding internal records and communications that could reveal any improper trading activities.

The probe comes amid concerns that individuals with access to non-public government information might be exploiting prediction markets to trade on that knowledge. Polymarket and Kalshi allow users to bet on the outcomes of future events, including political and economic developments. The investigation aims to determine whether any government employees have engaged in insider trading by using their privileged access to classified information to place bets on these platforms.

This investigation is significant because it underscores the growing regulatory scrutiny facing prediction markets. While these platforms offer a unique way for users to express their views on future events, they also raise concerns about market manipulation and the potential misuse of sensitive information. The outcome of this probe could lead to stricter regulations or even the shutdown of these platforms if evidence of wrongdoing is found.

For everyday users of prediction markets, this investigation serves as a reminder to be cautious about the information they use to place bets. It also highlights the importance of transparency and accountability in these markets. Users should stay informed about any regulatory developments that might affect the operation of these platforms. If the investigation uncovers significant wrongdoing, it could lead to changes in how prediction markets are regulated and operated. Read more → https://www.coindesk.com/policy/2026/05/22/congress-probes-polymarket-and-kalshi-over-fears-government-employees-are-trading-on-secret-info