New York prosecutors investigate potential insider trading on Polymarket prediction platform

Federal prosecutors in New York have opened discussions with representatives from Polymarket about whether insider trading laws could apply to unusual activity on the prediction-market platform, according to people familiar with the matter. S. Attorney's Office for the Southern District of New York and follows scrutiny of several trades that drew attention for their timing and specificity. Officials have focused on wagers tied to sensitive geopolitical and political events.

No wrongdoing has been attributed to Polymarket itself.

The conversations center on whether legal concepts typically used in traditional financial markets could be relevant when prediction-market trades appear to rely on non-public or improperly obtained information. Prediction markets allow users to buy and sell contracts whose value depends on real-world outcomes, creating incentives for participants to seek informational advantages.

Prosecutors’ interest reflects broader questions about how market integrity standards translate to event-based contracts. A key uncertainty is how authorities will interpret and apply insider-trading concepts in this setting.

Examples cited in the scrutiny include bets linked to an “Iran War” timeline and to the kidnapping of Venezuelan President Nicolas Maduro. One highlighted case involved a trader who reportedly turned a $30,000 position tied to Maduro’s capture into more than $430,000. The trades were described as notable for their timing and detailed nature, which prompted questions about whether the information behind them was public at the time.

The discussions with Polymarket are aimed at understanding how such activity should be treated under existing frameworks.

The inquiry comes as Polymarket works toward a re-expansion into the United States after earlier restrictions. The platform faced U.S. restrictions in 2022 for operating without a license. It later obtained regulatory approval in November 2025 through a holding company and has been preparing for a U.S. re-launch.

Polymarket has said it has adopted integrity measures, including rules that prohibit bets based on stolen information and restrictions that bar participation by people who can influence the outcomes of the events being wagered on. The company’s approach reflects the operational challenge for prediction markets: contracts can reference high-impact events, while platforms must set and enforce standards that limit misuse.

Prosecutors’ engagement underscores that authorities are examining how these guardrails function when suspicious trading patterns emerge.

The scrutiny is also part of a wider regulatory pushback affecting other platforms. Kalshi, another U.S. prediction market, is reportedly facing legal challenges and bans in several states, including Nevada, along with criminal charges in Arizona. The developments highlight the fragmented nature of U.S. legal and licensing regimes for the sector, with different jurisdictions taking different approaches.

Globally, the issues intersect with how platforms handle contracts tied to international conflicts, political leadership stability, and other consequential events. For market participants, the central open question remains whether and how authorities will extend insider-trading concepts to prediction markets when trades appear suspicious but no platform-level misconduct has been alleged.