Polymarket US traded $2.72B in a single week, up more than 44x this year

Polymarket US recorded $2.72 billion in weekly notional trading volume in the week ending in early October 2026, compared with $60.8 million in early January, according to Crypto Briefing. That puts the increase at more than 44 times in less than a year.

Daily volume reached a peak of $698.8 million on October 11, 2026. The trailing 30-day total exceeded $11.39 billion as of October 11, indicating that elevated activity extended beyond the busiest day. Notional volume represents the face value of contracts traded, rather than revenue or profit earned by the platform.

Football and new contract formats fuel activity

Crypto Briefing attributes much of the expansion to sports, particularly NFL and NCAA football markets as their seasons got underway. Polymarket US added combo and parlay-style contracts in August 2026, with trading volume rising rapidly afterward.

September 2026 brought another milestone: Polymarket US reported that its trading volume had exceeded that of its international platform for the first time.

Growth within a competitive market

The increase coincided with records across the broader sector. According to Crypto Briefing, Polymarket and Kalshi together registered $8.56 billion over two days, while a record weekly total of $22.2 billion was noted around October 11, 2026.

Polymarket US operates under Commodity Futures Trading Commission oversight following its acquisition of QCEX and a relaunch in late 2025. Despite the expansion, Crypto Briefing reports that Kalshi remains the dominant competitor in that segment, leaving Polymarket US still seeking to gain market share.

What it means for prediction markets

• Volume is not earnings: The $2.72 billion weekly figure measures contract face value traded; it does not establish the platform’s revenue or profitability.
• Sports are central to the growth story: The reported contribution from football and the expansion into combo and parlay-style contracts makes the mix of trading activity important when assessing the increase.
• Platform comparisons require care: Polymarket US’s weekly total is distinct from the broader Polymarket-and-Kalshi records. Its September lead over its international platform also does not imply a lead over Kalshi.