Polymarket report says bot wallets drove most volume as US market rose to 47% of international trading by June
A new report by Surf argues that Polymarket effectively operated as two separate venues in the first half of 2026: its international market and the CFTC-regulated Polymarket US. The study is based on 787 million deduplicated trades and 1,733,011 wallets on the international market from January through June, along with market-level data from the US venue. According to the report, Polymarket US grew from 5% of the international market’s monthly volume in January to 47% in June, then reached 67% in July. The report also says fee generation was heavily concentrated in high-turnover categories. Sports and crypto accounted for 98% of roughly $184 million in gross fees on the international market in the first half, with crypto producing about $96.3 million in fees and sports about $83.5 million. User counts and trading activity were sharply misaligned: retail wallets made up roughly 90% of users, but bots and professional traders together generated about 80% of taker volume. Bot-like wallets alone represented 5.9% of wallets while handling about two-thirds of volume. Surf further found that Polymarket’s user acquisition did not depend on a single breakout market, and that category-level loyalty was weaker than platform-level retention. Roughly 51% to 57% of monthly active wallets returned the following month, though many switched into different categories. In profitability terms, bot wallets posted an aggregate net gain of about $108 million, yet only 27% of those wallets were profitable, and just 146 wallets maintained positive cash flow for six straight months.








