Kalshi and Polymarket saw their combined trading volume soar last month as the FIFA World Cup 2026 continues to drive bettors into prediction markets.
According to The Block's data dashboard, Kalshi, Polymarket, and Polymarket US recorded $44.8 billion in combined monthly trading volume in June, marking a 75% surge from May's $25.66 billion monthly volume.
Among the three, Kalshi saw the largest month-over-month increase in volume, growing 87.4% to $31.5 billion from $16.81 billion.
Polymarket's main, non-U.S. platform attracted $10.26 billion worth of volume last month, up 45% from the previous month's $7.08 billion.
Polymarket had seen a steady decline in monthly volume from March through May, while its U.S.-regulated platform sustained an upward trend. Polymarket US reported $3.04 billion in monthly volume last month, up from $1.77 billion in May.
