Kalshi, a prediction market valued at $11 billion and having raised $1 billion from investors, is facing scrutiny over its operations, particularly its extensive involvement in sports betting. While CEO Tarek Mansour has discussed the company's long-term vision, over 90% of the activity on Kalshi is driven by sports betting. The platform has seen $16.8 billion in trading volume from sports, compared to $4.9 billion from all other topics. This translates to roughly 89% of all fees collected by Kalshi coming from sports trades, a figure that has recently hovered closer to 95%. This contrasts sharply with major sportsbooks like DraftKings, where sports betting accounted for 52% of its Q3 revenue.

Critics argue that Kalshi's "sports-related event contract exchanges" may constitute illegal, unregulated sports gambling, potentially violating the Wire Act, the Indian Gaming Regulatory Act, and state-level regulations. Kalshi operates under the Commodity Futures Trading Commission (CFTC) as a "designated contract market," leveraging a previously "lax" regulatory environment. The company contends that the CFTC's lack of explicit action against these markets, which were once considered off-limits if determined to be against public interest, makes their sports markets legal event contracts and that CFTC authority preempts state-level gaming laws.

This interpretation has led to numerous legal battles, with states and tribal authorities that regulate gambling expressing dissatisfaction over what they perceive as unregulated and untaxed gambling-like activity. States that prohibit gambling, including Texas and California with 71 million residents, are also concerned. Major sports leagues, including the NFL, NBA, and MLB, have raised concerns with the CFTC regarding the potential for insider trading and lack of regulatory oversight on these platforms. NCAA president Charlie Baker has also warned about the lack of regulation, calling it potentially catastrophic.

Established gaming companies like FanDuel and DraftKings are now partnering with CFTC-licensed exchanges to offer prediction market products, indicating that Kalshi's "regulatory niche" is being recognized and potentially exploited by larger players. A Nevada judge has already deemed Kalshi subject to gambling laws, and some experts believe the ongoing legal disputes between states and Kalshi could reach the Supreme Court as early as June.