$5 Billion in Daily Trades For Two Days Running Kalshi Hits New Record

Kalshi has recorded more than $5 billion in notional trading volume on consecutive days, a milestone that underscores the platform’s rapid expansion and the growing dominance of parlay-style betting within the sector.

According to the company’s daily data files, Kalshi processed approximately $5.33 billion on Saturday and $5.36 billion on Sunday. The figures represent back-to-back records for the platform and place it among the highest-volume trading venues in the emerging prediction market industry, where it currently accounts for roughly three-quarters of tracked notional volume.

Parlays Account for the Majority of Volume

A defining feature of the record days was the composition of the trading activity. Parlay-style combination contracts – wagers that bundle multiple outcomes into a single position and pay out only if every leg succeeds – made up the majority of the volume, consistent with recent trends on the platform. Analyses of Kalshi’s trading data have previously found that such combination products regularly represent between 60% and 70% of the company’s notional volume, with the remainder spread across single-outcome contracts on sports, economics, and current events.

The concentration of activity in parlay products has drawn increased attention from regulators, researchers, and industry observers. A Bloomberg analysis of 2026 trading records found that Kalshi’s combination contracts were priced at an average probability of roughly 9% of resolving in the affirmative, compared with approximately 43% for non-parlay contracts, and estimated that users collectively lost $294 million on combo positions over the period examined.

A Sector in Rapid Expansion

Kalshi’s milestone arrives amid broader growth across the prediction market industry. Research from Pew Research Center has documented that trading volume on Kalshi and its primary competitor, Polymarket, more than doubled between May and July, an increase attributed largely to the surge in sports-related contracts. The two platforms together have moved from under $5 billion in annualized volume less than two years ago to monthly figures exceeding $50 billion at recent peaks, and the combined sector has surpassed $9 billion in a single day.

Kalshi has also crossed cumulative milestones, with total lifetime volume exceeding $100 billion. The platform’s rival, Polymarket, continues to post strong user engagement, including record numbers of active traders, though Kalshi maintains a substantial lead in notional volume.