Polymarket Tightens Insider-Trading Watch With Chainalysis

Polymarket said it is tightening insider-trading surveillance after backlash over bets allegedly informed by non-public or manipulated real-world information, including a reported $410,000 wager tied to Nicolás Maduro’s alleged capture. The platform will work with blockchain analytics firm Chainalysis and deploy a new detection model via Chainalysis Data Solutions to flag trades consistent with insider knowledge, support complex investigations, and train staff. The crackdown comes as U.S. enforcement on prediction markets escalates. A U.S. special forces soldier (Van Dyke) allegedly profited from classified information; he pleaded not guilty, received $250,000 bail, and faces travel limits. The DOJ has also pursued insider-trading charges involving a prediction platform for the first time, while a unanimous U.S. Senate vote bars senators and staff from trading in prediction markets. Broader regulatory pressure continues: lawmakers urged the CFTC to address “rapid erosion of integrity,” and New York sued Coinbase Financial Markets and Gemini over alleged state gambling-law violations. Despite the scrutiny, Polymarket cited ongoing user activity, and other data providers reported high March volumes across prediction markets. For traders, enhanced Polymarket controls may reduce headline and integrity tail-risk. Still, rising legal and compliance uncertainty could increase volatility around event-driven prediction positions.