Congress Turns Up the Heat: Kalshi and Polymarket Face Federal Insider Trading Probe
House Oversight Committee Chair James Comer is demanding internal records from prediction market CEOs, alleging government insiders may be cashing in on classified intelligence.
Written by OutOfToken AI
May 25, 2026 · 4 min read · Synthesized from reporting by CoinTelegraph · How this works
The U.S. House Committee on Oversight and Government Reform fired a formal shot across the bow of the prediction market industry on May 22, 2025, launching a sweeping insider trading investigation into Kalshi and Polymarket. Committee Chair James Comer, Republican of Kentucky, sent letters directly to both platforms' chief executives demanding internal records and documentation of how each company identifies and handles suspicious trading activity. At the center of the inquiry: a pattern of eerily well-timed bets tied to U.S. military operations in Iran and Venezuela — trades that Comer believes may have been placed using classified government intelligence.
The Trades That Triggered Washington
Comer's probe zeroes in on a cluster of trades that surfaced on both platforms in close proximity to sensitive geopolitical events, including U.S. military actions against Iran and Venezuela. The timing and specificity of these bets raised red flags that went beyond ordinary market speculation. In his letters to Kalshi CEO Tarek Mansour and Polymarket's leadership, Comer warned that federal employees with access to classified briefings could be exploiting that privileged knowledge to generate what he described as 'huge profits' on outcomes they had advance notice of. That framing elevates the investigation from a regulatory curiosity to a potential national security concern.
What the Committee Is Demanding
The Oversight Committee's requests are expansive. According to the formal inquiry, lawmakers want full access to internal materials that reveal how each platform verifies user identities, screens for conflicts of interest, and monitors for anomalous trading patterns. Crucially, the committee is also pressing both CEOs to explain what protocols — if any — exist to detect or prevent government employees from participating in markets where their professional knowledge could constitute insider information. Prediction markets, by design, aggregate crowd intelligence to price future events. But when that 'crowd' includes officials with advance knowledge of those events, the integrity of the market collapses entirely.
""Government employees could be using classified information to make huge profits" — House Oversight Committee Chair James Comer, R-Ky., in letters sent to Kalshi and Polymarket CEOs."
A Critical Moment for a Young Industry
Prediction markets have spent the last several years fighting for mainstream legitimacy. Kalshi won a landmark legal battle to offer federally regulated event contracts in the U.S., while Polymarket — operating offshore and drawing international liquidity — became the dominant platform for political event trading during the 2024 election cycle. Both saw explosive volume growth as institutional and retail interest converged on their order books. That momentum now runs headlong into congressional scrutiny at the worst possible moment. The probe also extends to election-related trades flagged by the committee, broadening the scope well beyond military events and suggesting lawmakers view the insider trading risk as systemic rather than isolated. For an industry still building regulatory credibility, a formal House investigation is not a speed bump — it's a stress test.
The Comer investigation sets up a defining confrontation between Washington's oversight machinery and a prediction market sector that has long argued its price signals serve the public interest. If the committee's records requests surface evidence of government insiders exploiting classified knowledge for market gain, the fallout could reshape how prediction platforms screen participants and how regulators classify market manipulation in this novel asset class. Kalshi and Polymarket have not publicly commented on the specifics of the probe, but both companies face a clear mandate: demonstrate that their compliance infrastructure is robust enough to keep bad actors out — or watch Congress write that infrastructure for them.
Editorial Note
James Comer is a real House Republican who chairs the Oversight Committee and has demonstrated interest in cryptocurrency regulation. Kalshi and Polymarket are legitimate prediction market platforms that have faced regulatory scrutiny. CoinTelegraph is a reputable crypto news source, though verification of the specific probe details would require confirmation from official House sources or primary statements.
Claim Tracker
AI-assessed
Future date claim; cannot be verified as this is a prospective article
Comer has been documented as Chair of the Oversight Committee
No public documentation of specific trades or evidence presented in article
Letter contents not provided or independently verified in article
Allegation presented without supporting evidence or confirmed instances
Ask AI about this story
// discussion
sign in to join the discussion