Comer launches investigation into prediction markets insider trading

House Oversight and Government Reform Committee Chair James Comer (R-Ky.) launched an investigation Friday into prediction market platforms Kalshi and Polymarket to determine whether their users are using nonpublic or classified information to engage in insider trading. Comer sent letters to Kalshi CEO Tarek Mansour and Polymarket CEO Shayne Coplan on Friday seeking details and...

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