source:[1] Polymarket gets big investment from New York Stock Exchange ... (https://www.axios.com/2025/10/07/polymarket-n ...)[2] NYSE-owner Intercontinental Exchange $2 billion Polymarket stake (https://www.cnbc.com/2025/10/07/nyse-owner-in ...)[3] NYSE owner to invest up to $2B in betting market startup Polymarket (https://subscriber.politicopro.com/article/20 ...)