The House Oversight Committee has launched an investigation into prediction markets Kalshi and Polymarket, seeking to determine if they have adequate safeguards to prevent insider trading. Committee Chairman James Comer (R-Ky.) sent letters to the CEOs of both companies requesting documents related to their user verification, geographic restrictions, and methods for detecting abnormal trading activity, setting a response deadline of June 5.
"The rapid growth and mainstreaming of this platform, the cryptocurrency infrastructure, and the anonymity it affords users may have created unintended structural conditions that bad actors — especially individuals with national security clearances — can exploit," Comer wrote in his letter to Polymarket CEO Shayne Coplan.
The inquiry follows a request from seven House Democrats and multiple reports of suspicious trading activity preceding major geopolitical events. One pattern cited involved a single trader who earned nearly $1 million from bets placed just hours before military strikes involving the U.S. and Iran. In another instance, 38 newly funded accounts collectively made over $2 million on strikes announced on February 28.
"We'll request information, and if we have trouble getting it, then a subpoena will follow," Comer said in an interview with CNBC. The bipartisan push for scrutiny highlights growing concern in Washington over the potential for individuals with access to nonpublic government information to profit from these platforms.
Heightened Scrutiny
The investigation is the latest in a series of moves by lawmakers and regulators to get ahead of the burgeoning prediction market industry. More than ten bills proposing new restrictions have been introduced in Congress since January. The White House has also taken action, warning staff in March against using nonpublic information to place bets on the platforms.
The concerns are not abstract. A U.S. Army soldier was recently taken into custody for allegedly using nonpublic intelligence to win nearly $400,000 by betting on the political future of Venezuelan leader Nicolás Maduro. According to reports, Polymarket's internal systems flagged the suspicious activity and the company turned the case over to federal law enforcement, which led to the arrest.
International Concerns
The probe is also examining international operations. In his letter to Kalshi CEO Tarek Mansour, Comer questioned whether the platform's expansion into more than 140 countries has resulted in weaker compliance and identity verification for international users compared to those in the U.S.
These concerns are amplified by events abroad. Israeli authorities recently indicted two individuals, including a military reservist, for allegedly using classified information to place bets on Iran-related events through the Polymarket platform. The case underscores the global nature of the challenge and the potential for classified information from any government to be monetized through these markets. The committee's findings could have significant implications for the future of prediction markets, potentially leading to stricter regulations, increased compliance costs, and a fundamental reshaping of how these platforms operate.
This article is for informational purposes only and does not constitute investment advice.