Federal prosecutors in New York have recently engaged in discussions with representatives from Polymarket regarding the application of insider trading laws to questionable bets placed on the platform, according to a report from CNN. While no wrongdoing has been alleged against Polymarket, the involvement of the U.S. Attorney’s Office for the Southern District of New York is not unexpected, given the number of suspicious trades recorded in recent months. These have included bets on unpredictable events such as the timing of the Iran War’s onset and the alleged kidnapping of Venezuelan President Nicolás Maduro. One notable bet involved an individual who wagered $30,000 on Maduro’s capture, ultimately earning over $430,000.
Polymarket faced significant legal challenges in the U.S., effectively becoming banned in 2022 for operating an unlicensed trading platform. However, it acquired a holding company that offers licensed trading in 2025 and received regulatory approval in November of that year. The platform is now cautiously re-entering the U.S. market, albeit with limited availability for American users. In response to inquiries, Polymarket maintained its commitment to high standards of market integrity and indicated its proactive collaboration with regulatory bodies and law enforcement to uphold those standards.
The rise of prediction markets—companies generally shunning the labels of gambling and betting—has coincided with the increasing intertwining of wagering in everyday American life. Still, this growth has not been without backlash from legislators and segments of the public wary of gambling and the potential for insider trading.
Critics of prediction markets include established players in the gambling industry who may feel threatened by the emergence of new platforms. Kalshi, another legal prediction market operating in the U.S., recently faced a two-week ban in Nevada following litigation from the state’s established gaming entities. This judicial ruling restricts contracts involving sports, elections, and entertainment, highlighting the regulatory hurdles facing these new markets. Additionally, Arizona’s Attorney General has pursued criminal charges against Kalshi, labeling its operations as illegal gambling in violation of state law.
“Kalshi may brand itself as a ‘prediction market,’ but what it’s actually doing is running an illegal gambling operation and taking bets on Arizona elections,” stated Arizona Attorney General Kris Mayes. As both Polymarket and Kalshi navigate an uncharted regulatory environment, they remain under intensive scrutiny from regulators and bettors alike, many of whom are concerned about fairness in the market.
In response to these concerns, Polymarket recently implemented new regulations to prevent bets originating from stolen information and those made by individuals who might influence event outcomes. Similarly, Kalshi announced measures to prohibit politicians from betting on their elections and athletes from wagering on their own sports competitions.
Despite the controversies, prediction markets have garnered attention as tools for gauging public sentiment and predicting outcomes, effectively serving as a form of snap polling. For example, traders on Polymarket have recently indicated a 24% likelihood that traffic through the Strait of Hormuz will normalize by the end of April, a significant drop from the 43% estimate recorded on March 24. This decline aligns with reports indicating that negotiations between the U.S. and Iran are not progressing, suggesting potential manipulation of market perceptions surrounding these geopolitical events.
The challenge of effectively monitoring insider trading in prediction markets raises additional complications, especially when knowledge about outcomes may be widely disseminated among various stakeholders. Kalshi’s CEO, Tarek Mansour, faced scrutiny over the difficulty of policing insider trading during an interview about entertainment-based bets. When asked about how to guard against potential insider trading, Mansour did not provide a clear solution, underscoring the complexities inherent in regulating this emerging market space.
