Technology & IT May 22, 2026

US House Investigates Kalshi and Polymarket for Alleged Insider Trading

By Abdus Salam

1 Views

U.S. House lawmakers have launched a formal inquiry into the prediction markets Kalshi and Polymarket, amid rising concerns over potentially fraudulent trading linked to insider information regarding military actions against Iran.

Representative James Comer, chair of the House Oversight and Government Reform Committee, dispatched letters to the CEOs of both companies, pressing for details on how they monitor and address suspicious trading activities. This move follows revelations of more than 80 trades that appeared to be strategically timed just prior to significant U.S. military operations.

In his communications, Comer expressed alarm over the implications of insider trading in such volatile contexts, stating, "Politicians and government officials with inside information are placing bets and taking profits. This insider trading must end." The concerns echo increasing scrutiny surrounding the integrity of prediction markets, especially in light of their proximity to real-world events and decisions.

Comer's inquiry references a New York Times report from May 13, which highlighted that users on these platforms were placing wagers on various outcomes, including Israel's military maneuvers against Iran and even domestic political events like congressional elections. In response, Polymarket announced an updated strategy to combat insider trading, while Kalshi declared that it had barred three U.S. politicians from their platform for engaging in bets on their personal races.

As Congress seeks clarity, Polymarket and Kalshi have yet to issue formal responses regarding the inquiry. The investigation underscores the growing urgency for regulatory oversight in an industry that merges finance and political forecasting.

Adding to the broader context of insider trading concerns within military operations, recent headlines also spotlight an ongoing criminal case against Master Sergeant Gannon Ken Van Dyke, accused of profiting through the use of confidential information about military actions related to Venezuela's Nicolás Maduro. He reportedly reaped over $400,000 through event contracts on Polymarket, raising alarm about the potential misuse of privileged information.

As the inquiry progresses, the implications for regulatory frameworks governing prediction markets could have significant repercussions on user trust and the integrity of the information that drives these platforms.

Source: CoinTelegraph - Cryptocurrency & Web3