Prediction markets are drawing even more attention in Washington after the House Oversight Committee officially opened an investigation into insider trading concerns tied to Kalshi and Polymarket. House Oversight Chairman James Comer confirmed this week that the committee sent letters to both companies requesting information on suspicious trades, user verification systems, and how the platforms monitor unusual activity.
The move comes as prediction markets continue to expand into sports, politics, finance, and world events at a much faster pace than many lawmakers expected. Questions are now growing about whether government officials, campaign staffers, or people with access to nonpublic information could use these markets to profit before major events become public.
Congress Says Prediction Markets Need More Oversight
One of the biggest takeaways from Comer’s comments is just how concerned lawmakers suddenly seem about this space. While discussing the investigation, Comer described prediction markets as the “Wild West” and said there are still very few clear rules surrounding insider activity on these platforms. According to reports, the House Oversight Committee wants both Kalshi and Polymarket to provide documents tied to suspicious trading detection, internal compliance systems, and identity verification policies.
The committee is also reportedly looking at how users may access platforms offshore or bypass restrictions using VPN services and other methods. Comer openly acknowledged that prediction markets have moved faster than regulation. “There are no written laws against it,” he said while explaining concerns that government employees or insiders could potentially use sensitive information connected to policy decisions, military activity, or elections.
Insider Trading Headlines Keep Piling Up
The investigation follows several major stories that have kept prediction markets in the political spotlight over the past few months. The investigation follows several major stories that have kept prediction markets in the political spotlight over the past few months. The biggest case involved U.S. special forces soldier Gannon Ken Van Dyke, who allegedly used classified information tied to the operation capturing Venezuelan President Nicolás Maduro to generate more than $400,000 through prediction market activity.
Federal prosecutors charged Van Dyke earlier this year, and lawmakers continue pointing to the case as an example of how vulnerable event contracts could become if insiders start participating directly in markets tied to government activity. Other reports have also raised questions around political trading.
One California political candidate reportedly traded on his own election market, while separate reporting linked dozens of Polymarket users to suspiciously timed activity tied to geopolitical developments involving Iran. Taken together, the headlines are making it much harder for Congress to ignore the category. Prediction markets are no longer confined to crypto or finance circles. They are now directly intersecting with elections, military operations, legislation, and public policy.
Kalshi Defends Its Compliance Systems
Kalshi responded quickly after news of the investigation became public. Company spokesperson Elisabeth Diana said the platform already has strong protections in place designed to monitor suspicious activity and insider trading concerns.
Kalshi has spent much of the past year publicly discussing its internal compliance efforts, including investigations into suspicious trades and account activity. The company continues arguing that federally regulated event contracts already operate under structured oversight designed to protect market integrity. Polymarket had not publicly commented immediately following the House Oversight announcement.
The Trade Handle Prediction Markets Take
The biggest shift here is that prediction markets are now firmly on Congress’s radar. Lawmakers are no longer simply debating whether these platforms fit into gambling or financial regulation. The conversation is becoming much more focused on insider access, suspicious activity, compliance systems, and how these markets operate behind the scenes.