Polymarket is in talks to raise roughly $400 million at an estimated $15 billion valuation, according to The Information — a sign that prediction markets are rapidly moving from crypto curiosities toward mainstream finance. Sources say the round could expand to about $1 billion if Polymarket brings in additional strategic investors beyond Intercontinental Exchange (ICE), the New York Stock Exchange parent that has become the platform’s biggest backer. ICE poured $600 million into Polymarket last month, bringing its total disclosed investment to $1.6 billion. That transaction also included an agreement for ICE to buy up to $40 million of Polymarket securities from existing holders, part of fulfilling an earlier commitment tied to an October deal that valued the company at $9 billion. ICE’s involvement has been more than just capital. Under the October agreement the exchange operator became the exclusive global distributor of Polymarket’s event-driven data to institutional markets, and in February it rolled out “Polymarket Signals and Sentiment,” integrating prediction-market insights into its financial infrastructure products. Those moves underscore why institutional interest is being viewed as a watershed moment for the sector. The broader market is heating up: rival Kalshi raised about $1 billion earlier this year at a reported $22 billion valuation, and traditional players like Charles Schwab and Nasdaq are increasingly active in or eyeing prediction-market products. That momentum, however, comes amid intense regulatory scrutiny. States and federal authorities remain split on whether prediction markets constitute gambling or are federally regulated event contracts. Regulators and courts have already taken conflicting steps: Nevada banned Kalshi from operating inside the state; Arizona has filed criminal charges alleging unlicensed gambling; an appeals court recently ruled certain sports-related markets should fall under federal oversight; and the Department of Justice and the Commodity Futures Trading Commission (CFTC) have jointly sued Illinois, Arizona, and Connecticut over which authorities get to regulate these platforms. CFTC Chair Michael Selig has warned that pushing prediction markets offshore could invite catastrophic failures similar to FTX, urging U.S. registration and regulatory guardrails so exchanges can offer “fair markets, investor protections, customer protections, and real rules.” Polymarket’s potential new financing — and the growing institutional partnerships behind it — highlights both the commercial promise of prediction markets and the unresolved legal questions that will shape how far and how fast the industry can scale. Read more AI-generated news on: undefined/news