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In a move reflecting intensified regulatory scrutiny over prediction markets, US House lawmakers have launched a formal probe into Kalshi and Polymarket. According to reports, Representative James Comer has requested detailed information from the CEOs regarding internal controls to prevent insider trading. The investigation was triggered by suspiciously timed trades related to US military actions against Iran, raising significant concerns about the integrity of these emerging financial platforms.
This probe arrives as prediction markets experience explosive growth, with Polymarket alone recording cumulative volumes exceeding $1 billion during major political cycles per market data. Analysts draw parallels between this scrutiny and the regulatory pressures previously faced by major crypto exchanges like Coinbase regarding listing policies and fair trading. The House Oversight Committee's inquiry is part of a broader effort to ensure that sensitive government information is not leveraged for illicit financial gain in digital markets.
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Sign InTraders should monitor the companies' compliance with congressional requests, as adverse findings could lead to operational restrictions or heightened compliance costs. While the economic calendar shows no direct events for these entities, the release of the RBA Meeting Minutes on May 19, 2026, may influence broader risk sentiment in the crypto-adjacent sector. Market participants should watch for further statements from James Comer that might signal an escalation of the probe into public hearings.