Polymarket is reportedly in early talks to raise about $1 billion at a valuation above $20 billion, a potential jump that would put its newly live U.S. exchange at the center of the company’s next growth story. Polymarket’s U.S. exchange changes the fundraising storyThe current talks are different from earlier funding rounds because they follow the broader opening of Polymarket’s U.S. exchange. Those figures help explain why investors are willing to discuss a valuation above $20 billion, even though the round remains unclosed. Regulatory scrutiny remains the main risk to the valuation casePolymarket’s growth has not removed its regulatory risk. If Polymarket closes a round above $20 billion, the valuation will reflect confidence in U.S. exchange growth, not just international trading activity.