
The New York City Council is investigating four prediction markets for alleged deceptive marketing practices and targeting minors, opening a new front in the bitter, state-by-state legal war over prediction-market regulation. City Council Speaker Julie Menin sent letters to Polymarket, Kalshi, Coinbase and Gemini Titan, all of which have a presence in New York City, on Aug. 11 seeking answers about how the companies comply with consumer protection laws. In a letter addressed to Polymarket founder and Chief Executive Shayne Coplan, Menin asked for details about Polymarket promotional videos that appeared to depict fake trades and promoted insider trading on social media.