Kalshi Wins Exclusive US Open Prediction Market Deal
Kalshi has become the US Open’s exclusive prediction market partner under an agreement with the United States Tennis Association (USTA). The deal took effect before the tournament’s main draw and prevents rival platforms, including Polymarket and Novig, from advertising at US Open venues or during related ESPN broadcasts. Financial terms were not disclosed.
Kalshi had already launched US Open prediction markets. Its women’s singles champion market generated about $1.5 million in trading volume by Sunday afternoon. USTA chief executive Craig Tiley, who took office in February 2026, reportedly accelerated the partnership.
The agreement gives Kalshi prominent exposure in sports prediction markets and could increase activity around major tennis events. Kalshi, Polymarket and Polymarket US recorded combined trading volume of $41.2 billion from August to date, with Kalshi accounting for $33.7 billion, or about 82%. However, Kalshi faces regulatory uncertainty after the Ninth Circuit ruled that it had not shown federal commodities law pre-empts Nevada gambling rules covering its sports contracts. The decision conflicts with an earlier Third Circuit ruling, creating a federal circuit split over state authority and the CFTC. Traders should view the Kalshi partnership as a growth catalyst for platform activity, but not as a direct cryptocurrency price signal.
Neutral
The news is neutral for cryptocurrency prices because no cryptocurrency token is directly mentioned or affected. In the short term, the exclusive US Open deal could increase Kalshi’s user acquisition, trading volume and visibility, while the reported $1.5 million in women’s singles market activity provides an early indicator of sports prediction-market demand. It may also intensify competition with Polymarket and other platforms.
However, these effects concern prediction-market businesses rather than crypto assets. The Ninth Circuit ruling adds regulatory risk for Kalshi’s sports contracts, although the conflicting Third Circuit decision could prolong uncertainty rather than produce an immediate market shock. Over the longer term, greater sports-market adoption may expand interest in event-based trading and Web3-adjacent financial products, but without a directly linked token, the event is unlikely to create a sustained bullish or bearish move in cryptocurrency markets.