Prediction markets posted eye-catching growth during the World Cup, with Kalshi reporting more than $31 billion in notional trading in June and Polymarket topping $10.8 billion for the month. These figures matter to Californians who track online gambling and adjacent markets.
Event-based trading platforms are becoming a bigger part of the wider wagering conversation. That holds even if the news itself is not California-specific.
CNBC’s latest Daily Open newsletter highlighted the surge as one part of a broader market roundup. Both Kalshi and Polymarket set or sustained unusually high activity during the tournament. Thus, the prediction-market angle stood out.
World Cup volume gave prediction markets a major boost
According to CNBC, Kalshi’s June notional volume rose more than 70%, from May’s $17.9 billion to more than $31 billion. Kalshi has consistently handled more than $1 billion in daily volume since the football tournament began on June 11.
Polymarket also hit a new monthly record, with notional trading exceeding $10.8 billion on its international event contract exchange.
Those numbers matter. They show prediction markets attracting attention at scale during a major global event. That does not automatically translate into changes for California gambling options. However, interest can quickly concentrate around sports, politics, and headline-driven events.
Why prediction markets cut through the noise
The CNBC report also covered President Donald Trump’s intervention in a World Cup suspension involving U.S. striker Folarin Balogun, plus NATO diplomacy and several large M&A developments. Even in that broader mix, prediction markets were prominent enough to be singled out with hard volume data.
That makes this more than a passing mention. It suggests a notable shift. Prediction markets are increasingly being watched as a business story, not just a niche product category.
What the numbers mean for CA bettors
Prediction markets are drawing significant liquidity during major events. High volume can be a sign of stronger engagement and more attention on these platforms. That’s especially true when a tournament or other global storyline dominates the news cycle.
At the same time, this particular report does not point to any California-specific policy change, launch, or regulatory update. The local relevance is more about market direction than immediate access.
In other words, this is a national and international trend worth watching rather than a direct shift in the state’s gambling landscape.
The next test for prediction markets
The tournament buzz will eventually fade. The next question is whether this World Cup-driven momentum holds anyway. Future major events could also produce similar spikes for Kalshi and Polymarket. That’s worth watching. For now, the clearest signal is growing scale.
As always, anyone engaging with gambling-adjacent products should avoid treating fast-moving event markets as low-risk entertainment.
Source: As reported by CNBC
