Kalshi Surpasses $4 Billion in Weekly Trading Volume for the First Time

Prediction market platform Kalshi posted $4.13 billion in notional trading volume during the week ending May 4, marking its first time crossing the $4 billion weekly threshold and an 8.5% increase from the prior week’s $3.81 billion. The CFTC-regulated platform now commands 72.1% of combined volume between itself and rival Polymarket, which saw its weekly volume decline 6.2% to $1.60 billion.

Sports event contracts accounted for more than 80% of Kalshi’s total weekly turnover, with NBA playoff-related markets leading the surge. The platform’s Exotics product, offering combination and parlay-style contracts, grew 23.2% week-over-week to $511.6 million.