Kalshi has flagged more than 400 suspicious trades since the start of this year, more than double the number it investigated in all of 2025, according to a Reuters report citing sources familiar with the matter.
Some of those trades have been referred to the Commodity Futures Trading Commission, one source said. The surge in flagged activity arrives as Kalshi’s annualized trading volume has tripled in six months to $178 billion.
Polymarket has seen a similar uptick in flagged trades this year, a separate source told the agency. Its monthly notional volume hit roughly $10.3 billion in April, up from $3.8 billion in the same month last year, according to Dune Analytics data.
Oil Bets Landed Just Before Iran Announcement
Reuters reported that recent well-timed bets on falling oil prices preceded a major Iran-policy announcement from the Trump administration, without naming the platform or specifying the contracts.
Catching bad actors can be difficult. Former SEC …
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