Polymarket Weekly Volume Slides 56% From June Peak, Kalshi Drops 25%

Prediction market volumes decline sharply from summer highs as event-driven demand cools. Polymarket sees 56% drop, Kalshi 25%, highlighting sector reliance on major political and sports calendars.

Woofun AI data shows that weekly trading volume on prediction market platforms Polymarket and Kalshi has fallen sharply from recent highs. Polymarket's combined global and U.S. platform volume decreased by 56% at the end of last month compared to the record high reached in June. This decline follows a surge in activity earlier in the summer driven by high-profile political races and major sports tournaments. Kalshi experienced a smaller decline of 25% over the same period. The report attributes the reduced demand for sports-related contracts to the conclusion of the World Cup, which had been a major driver of trading volume on both platforms.

The pullback in volume reflects the cyclical nature of these platforms, which rely heavily on a calendar of political, sports, and cultural events to sustain user engagement. Polymarket's larger decline may reflect its heavier reliance on political betting, which saw intense activity during primary seasons and major elections. With fewer headline-grabbing political events in recent weeks, trading interest has naturally cooled. Kalshi's smaller drop could be attributed to its broader range of event contracts, including economic and entertainment categories, which provide a more stable base of activity.