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Fast-growing prediction markets will attract fraud and insider trading, Kalshi CEO Tarek Mansour acknowledged on "The Axios Show," but he said investigators will "inevitably" expose and punish bad actors.

Why it matters: Operators like Kalshi and Polymarket are under pressure to root out suspected incidents of insider trading, particularly on matters like politics, war, sports and entertainment.

Between the lines: The Commodity Futures Trading Commission regulates Kalshi to operate in the U.S. Mansour said if there was a yes/no bet on his own platform on whether the CFTC would pursue an insider trading case in the next 12 months, he expects the answer would be "yes."