World Cup Bonanza: Kalshi’s Prediction Market Soars with 3 Million New Users and Billions in Trades

The 2026 FIFA World Cup proved to be a monumental event for Kalshi, a leading prediction market platform, driving an influx of 3 million new users and generating an astounding $1.2 billion in trading volumes. As the global soccer spectacle unfolded, a surge of speculators engaged with the platform, placing trades on various match outcomes and significantly boosting Kalshi's market activity.

Data shared by the company with CNBC revealed the World Cup as a pivotal moment for user acquisition. The market dedicated solely to predicting the winner of the World Cup alone processed over $1.2 billion in trades, setting a new record for a singular market on the platform. This particular market was scheduled to conclude on Sunday, coinciding with the highly anticipated final match between Spain and Argentina.

Vijay Viswanathan, an associate dean of integrated marketing communications at Northwestern University, emphasized the unparalleled global appeal of soccer. "I don't think there's any game like football," he remarked, highlighting its presence in virtually every country across the globe. Viswanathan concluded that "in just terms of the total addressable market, there's really nothing that comes close to the FIFA World Cup."

Kalshi capitalized on the tournament's immense popularity through a comprehensive marketing offensive. This included a strategic alliance with ADI Predictstreet, the official prediction market sponsor of the World Cup, which resulted in co-branded advertisements prominently displayed in stadiums. Kalshi also partnered with OpenAI, integrating its contract odds directly into ChatGPT for users searching for tournament games.

The platform further amplified its brand through high-profile celebrity endorsements, featuring esteemed soccer figures such as Croatian star Luka Modric and legendary coach José Mourinho. A significant collaboration with the Argentina national team even earned Kalshi a coveted mention in an Instagram post by superstar Lionel Messi. Tarek Mansour, Kalshi's CEO, underscored the company's agile and responsive marketing philosophy, stating, "Our volumes are where the news is at. ... The most important thing is enable creativity based on what's happening."

This commitment to agility was evident in their rapid content creation; Mansour highlighted an advertisement featuring former professional soccer stars playing a scrimmage, which was conceived, executed, and released within a mere 24 hours. Expanding its reach beyond soccer, Kalshi also launched advertisements with non-sports celebrities like actor Timothee Chalamet and Colombian singer J Balvin. This broader approach aimed to remind a wider audience of the universal applicability of prediction markets. Elizabeth Johnson, executive director of the Wharton Neuroscience Initiative, noted this strategy helps them "seize this moment to remind people about the ubiquitousness of what these prediction markets are."

Despite its success, Kalshi's heavy involvement in sports events is not without regulatory challenges. Prediction markets, especially those tied to sports, are currently embroiled in a legal dispute between the federal government and various U.S. states. State governments argue that these contracts are equivalent to sports betting, an area they traditionally regulate. Kalshi, however, aligns with the federal government's stance that the Commodity Futures Trading Commission (CFTC), responsible for overseeing swaps and derivatives, possesses the sole authority to regulate prediction markets.

Mansour largely dismissed these regulatory concerns, suggesting that the pressure primarily emanates from incumbent gambling companies seeking to safeguard their dominant market positions. Brian Sung, a partner specializing in derivatives and digital assets at Haynes Boone, commented that while Kalshi's advertising strategies might not directly influence court rulings, they could shape public and political perception. "It does kind of weaken their perception, in public or politics," he observed, noting that despite Kalshi's efforts to diversify, the majority of its activity remains sports-related.

Kalshi's immediate objective now shifts to converting these 3 million new users into consistent, recurring traders. A significant challenge lies in the observed drop in trading volumes on days when World Cup matches were not being played. Nevertheless, Mansour maintains an optimistic outlook, viewing this as a cyclical pattern where major events drive temporary peaks, followed by a decline, and then a steady ascent fueled by a continuous stream of new global events. "You have to believe there's not going to be any news after Sunday," he quipped, adding, "but the more probable thing is that there's going to be like a bunch of things going on in the world, and Kalshi's going to be there to service it."

Disclosure: CNBC and Kalshi have a commercial relationship that includes customer acquisition and a minority investment.