US Senators Elizabeth Warren and John Curtis have called on prediction market operators Kalshi and Polymarket to clarify how they address risks of insider trading and market manipulation related to election betting. Their concerns were detailed in a bipartisan letter seeking information on the companies' safeguards, enforcement actions, and compliance with Commodity Futures Trading Commission (CFTC) rules.
Senators Cite High-Profile Manipulation Allegations
The letter follows reports of alleged manipulation on Polymarket during the 2024 presidential election, with claims that about a third of trading volume in the presidential market may have been affected. The senators also highlighted incidents where political candidates, including a former Virginia Senate candidate, traded on their own electoral outcomes via Kalshi. These cases have prompted questions about how many improper transactions may have gone undetected on such platforms.
Ongoing Legal Scrutiny for Operators
The increased attention comes as Kalshi CEO Tarek Mansour and other prediction market executives face criminal charges in Utah. The state’s Attorney General has accused them of illegally profiting from promoting and offering online gambling, resulting in multiple felony and misdemeanor counts. These legal challenges add to the regulatory scrutiny already facing the sector.
Operator Responses and Compliance Measures
Kalshi representatives have stated that the company prohibits insider trading and market manipulation, and that it actively blocks candidates and campaign staff from trading on its platform. Kalshi reportedly checks Federal Election Commission payroll records to identify restricted traders and has an independent market integrity committee. However, senators have requested more detail on safeguards that go beyond FEC data, particularly regarding those with access to material nonpublic information.
Why This Matters for Industry Stakeholders
For operators, the senators’ inquiry underscores the growing regulatory and legal risks associated with election-related prediction markets. Affiliates and suppliers may also face increased scrutiny over their partnerships and promotional activities. Regulators are likely to intensify oversight, especially concerning market integrity and the prevention of improper trading. The outcome of these investigations could influence future policy decisions and the operational landscape for prediction market platforms in the US.
Key takeaways
- US Senators have questioned Kalshi and Polymarket over election betting safeguards.
- Allegations include insider trading and manipulation by political candidates.
- Operators face both regulatory inquiries and criminal charges in Utah.
- Industry participants should expect heightened scrutiny and possible policy changes.