Polymarket US traded $2.72 billion in notional volume last week, a 44-fold increase from $60.8 million in early January. The peak daily volume hit $698.8 million on October 11, 2026, with the trailing 30-day total exceeding $11.39 billion. The growth has been driven primarily by sports markets, particularly NFL and NCAA football contracts, as well as the introduction of combo and parlay-style contracts in August 2026. In September 2026, US volume surpassed the international platform for the first time.
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