Overview
Polymarket’s international prediction‑market platform posted a trading volume of $7.1 billion in May 2026, representing a decline from $9 billion in April and $10.5 billion in March, the platform’s peak month. This marks the second consecutive month of falling international volume after a period of rapid growth, during which volumes expanded by more than 850 % between August 2025 and March 2026.
U.S. Segment Performance
During the same month, Polymarket’s U.S. operation recorded a volume increase to $1.77 billion, up from $1.26 billion in April, indicating divergent regional trends.
Competitive Landscape
The platform’s main competitor, Kalshi, processed over $17.9 billion in trading volume in May, substantially outpacing Polymarket’s international figures.
Early June Indicator
Data for the first week of June 2026 show Polymarket’s international platform handling $1.9 billion in volume, the highest weekly total since late April, suggesting a possible reversal of the recent downtrend.