House lawmakers launch insider trading probe into Kalshi and Polymarket
Updated on: May 22, 2026 / 3:58 PM EDT / CBS News
TL;DR
- The House Oversight Committee is investigating Kalshi and Polymarket for alleged insider trading.
- Chairman James Comer is seeking details on the companies' insider trading investigation and user verification processes.
- Suspiciously timed bets on events like the Iran war and Nicolás Maduro's capture have raised concerns.
- A soldier was charged with using confidential information to bet on Maduro's removal.
- Both platforms have implemented new rules and tightened existing ones to prevent insider trading.
- Kalshi has banned members of Congress from creating accounts and fined candidates for betting on their own elections.
- Polymarket's new rule prohibits traders from betting on events if they have a position of authority that could affect the outcome.