The figure adds a scale marker for the prediction market industry. The data also shows how strongly sports contracts now shape Kalshi’s trading activity, even as the company expands into other product areas.
Weekend Trading Hit New Highs
The cited market data put Kalshi’s lifetime notional volume at about $102.3 billion. That leaves the trading platform almost $9 billion ahead of Polymarket by the same measure.
The highest daily volumes came on June 13 and June 14, when Kalshi reported $1.22 billion and $1.24 billion in respective figures for those two days. Those were Kalshi’s first reported days above $1 billion in daily notional volume.
Timing was key here. The weekend included World Cup matches, Game 5 of the NBA Finals, Game 6 of the Stanley Cup Finals, and UFC Freedom 250.
For iGaming and sports betting operators, the signal is clear. Prediction markets are now competing for attention during major sports windows.
Sports Still Set the Direction
Kalshi has been adding products outside sport. It offers coverage on political, economic, weather, entertainment, and crypto-based markets. Kalshi has also tried to frame itself as a broader regulated derivatives exchange.
However, sport remains the key driver of trading. According to the Pew Research Center analysis, sports accounted for 80% of Kalshi’s trading volume from July 2024 to April 2026. Polymarket had another composition, with 39% of sports trading and a bigger share for politics.
This makes the World Cup surge more than a short event spike. Kalshi is drawing extra activity from the same category that already gives the platform most of its depth.
The one thing that must be mentioned about the numbers above is that notional volume differs from sportsbook handle. Notional volume indicates the theoretical value of the contracts traded and depends on the size and structure of those trades. It does not indicate how much users have deposited or how much they have risked.
Perpetual Futures Add Another Growth Line
The crypto perpetual futures that Kalshi introduced were also another element behind the activity. The product was launched in June, and reported volume exceeded $100 million in the first 24 hours.
It should not be confused with the contracts around the sports events. Nevertheless, it demonstrates how Kalshi attempts to expand its model of exchange by including the needs of both types of users: those trading event contracts and those looking for crypto-related derivative products within the regulated U.S. environment.
That pressure is no longer theoretical. CME has sued the CFTC over its decision to allow Kalshi and Coinbase to offer perpetual futures, arguing that the products should face stricter treatment as swaps.
Bottom Line
The $100 billion mark is best read as a market maturity signal, not a simple win over sportsbooks. Kalshi has shown that prediction markets can absorb major sports demand at scale. The next test is whether that activity can stay strong after the World Cup peak, and whether regulators treat sports contracts as financial products, gambling products, or something that now sits between both systems.
