Sources: Kalshi has probed and flagged 400+ suspicious trades YTD, more than 2x the number it investigated in all of 2025; Polymarket has seen a similar uptick (Anirban Sen/Reuters)

Anirban Sen / Reuters : Sources: Kalshi has probed and flagged 400+ suspicious trades YTD, more than 2x the number it investigated in all of 2025; Polymarket has seen a similar uptick —  Top prediction market platforms Kalshi and Polymarket have witnessed a surge in suspicious trades this year …

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