The chair of the House Oversight Committee has requested documents from prediction market platforms Polymarket and Kalshi, opening an investigation focused on insider trading and markets tied to war. The move, led by House Republicans, signals a new front in congressional scrutiny of how these platforms operate and whether they allow users to profit from non-public information or sensitive geopolitical events.
Why the investigation was opened
The committee is looking into allegations that individuals may have used insider knowledge to trade on war-related outcomes. Both Polymarket and Kalshi allow users to place bets on the likelihood of specific events, including military conflicts. Lawmakers want to understand whether the platforms have adequate safeguards to prevent trading based on confidential information, and whether such markets could be exploited to manipulate public perception or profit from tragedy.
What the document request covers
The chair sent formal requests to Polymarket and Kalshi seeking records related to trading activity, user policies, and any internal investigations into suspicious trades. The scope includes markets that reference armed conflicts, military actions, or geopolitical crises. The committee also wants to see communications between the companies and any third parties that may have provided data or analysis used to set market odds.
Polymarket and Kalshi under the microscope
Polymarket and Kalshi are two of the most prominent platforms in the U.S. for event-based contracts. Polymarket, based in New York, operates a decentralized prediction market. Kalshi, a regulated exchange, offers contracts on everything from weather to political events. Both have faced questions before about the integrity of their markets. This investigation marks the first time a congressional committee has requested internal documents regarding war-related wagers.
What happens next
The companies now have a deadline to produce the requested materials. The committee will review the documents and could call for hearings or recommend new legislation to regulate prediction markets more tightly. The investigation is ongoing, and no conclusions have been drawn. The next step will be the committee’s assessment of the records, followed by potential public testimony from executives.
