Matchbook, a 15-year-old UK peer-to-peer betting exchange, is entering the US market with both prediction markets and traditional sports betting. The company filed for CFTC approval through its US subsidiary RSBIX LLC in September 2025, with initial clearance expected by March 2026, now pushed back to Q3 2026 at the earliest. It aims to compete directly with Kalshi and Polymarket, differentiating through its peer-to-peer exchange model and white-label infrastructure ambitions. The regulatory challenge is significant: sports betting falls under state-by-state regulation while prediction markets are overseen federally by the CFTC.
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