Kalshi Sees 1,520% Surge in US Traffic and $40 Billion Monthly Volume

Prediction market platform Kalshi has experienced a 1,520% increase in US website traffic over the past year, reaching 15.4 million visits in July compared to less than 1 million in August 2025. US traffic now accounts for nearly 80% of its total. Monthly nominal trading volume hit $40 billion in August, a 4,500% rise from $874 million a year ago, with Kalshi capturing nearly 79% of the total prediction market industry volume. Sports contracts represented 83% of Kalshi's July trading volume. Despite this growth, the platform faces legal challenges from New