CFTC charges second individual in a month with insider trading of event contracts
The Commodity Futures Trading Commission filed a civil enforcement action on May 27, 2026, targeting alleged insider trading on event contracts traded on Polymarket. Separately, Wisconsin moved to dismiss a CFTC lawsuit filed in April over event contracts, defending its enforcement actions alongside a parallel criminal action. The commission has now brought two insider-trading enforcement actions against individuals in just over a month, reflecting an expanding enforcement push into prediction market activity. Federal banking agencies also stripped reputation risk from guidance, and the CFTC vacated prior guidance, in related regulatory developments.
Polymarket must now harden surveillance against confidential-data exploits by both corporate and government insiders. Any detection gap exposes the platform to co-defendant liability in future DOJ-CFTC parallel actions.
Marks the third coordinated DOJ-CFTC insider-trading action since the Google engineer cases, cementing a pattern of parallel criminal and civil enforcement against exploiters of search data and government secrets on Polymarket.