The legal fight over prediction markets in the United States has largely focused on disputes between exchanges and state regulators. However, a separate lawsuit filed by three California Native American tribes could prove even more significant for the industry’s future.
Unlike previous cases centered on state gambling laws, this lawsuit argues that prediction market operator Kalshi violates the Indian Gaming Regulatory Act (IGRA) by offering sports event contracts that function like sports betting on tribal lands. The case raises broader questions about tribal sovereignty, federal law, and the future regulation of prediction markets in the U.S.
California tribes challenge Kalshi under federal gaming law
The lawsuit was brought by three federally recognized tribes:
- Blue Lake Rancheria
- Chicken Ranch Rancheria of Me-Wuk Indians
- Picayune Rancheria of the Chukchansi Indians
The tribes argue that Kalshi’s sports prediction contracts amount to Class III gaming, which under the Indian Gaming Regulatory Act requires tribal approval, regulatory oversight, and negotiated gaming agreements.
According to the complaint, when users access Kalshi’s platform while physically located on tribal lands, the exchange is effectively offering unauthorized gaming within tribal jurisdictions.
District court initially sided with Kalshi
In November, a federal district court declined to issue a preliminary injunction against Kalshi.
The court concluded that:
- Tribal gaming agreements regulate activities conducted by the tribes themselves rather than third-party exchanges.
- Transactions executed through a Commodity Exchange Act (CEA)-registered exchange fall outside certain federal internet gambling definitions.
- The Commodity Futures Trading Commission (CFTC) retains primary authority over determining whether event contracts qualify as regulated financial products.
This decision allowed Kalshi to continue operating while the case moved forward on appeal.
Ninth Circuit raises difficult questions
The case has now reached the U.S. Court of Appeals for the Ninth Circuit, where judges appeared more skeptical of Kalshi’s legal arguments during oral hearings.
One judge reportedly observed that the contracts “sound like a bet,” while another questioned whether tribal sovereignty should receive greater protection despite federal derivatives regulations.
Although appellate judges have not yet issued a ruling, their questions suggest the legal outcome remains far from certain.
Why this case differs from state lawsuits
Most recent legal challenges involving prediction markets have focused on whether federal derivatives law overrides individual state gambling regulations.
This lawsuit is fundamentally different.
Instead of challenging state authority, it examines whether one federal law—the Commodity Exchange Act—can override another federal law, the Indian Gaming Regulatory Act, which governs gaming operations on tribal lands.
Because tribal rights are protected under separate federal statutes and longstanding legal principles, the issues raised in this case extend beyond traditional federal-versus-state disputes.
Tribal gaming rights could be affected
For many Native American tribes, gaming revenues fund essential public services, including:
- Healthcare
- Education
- Infrastructure
- Community development
The tribes argue that prediction markets offering sports-based contracts could undermine the exclusivity they negotiated through gaming compacts with state governments.
Several tribal organizations believe allowing federally regulated exchanges to offer similar products without tribal approval weakens decades of agreements that support tribal self-governance and economic development.
Industry argues federal regulation already applies
Kalshi maintains that it operates as a federally regulated derivatives exchange rather than a sportsbook.
The company argues that:
- Its contracts qualify as regulated financial products.
- The CFTC has exclusive authority over approved event contracts.
- Existing federal statutes exclude CEA-regulated exchanges from certain gambling laws.
From Kalshi’s perspective, prediction markets fall within the federal commodities framework rather than traditional gaming regulation.
Industry watches closely
The lawsuit has attracted widespread attention across the prediction market industry.
More than 60 federally recognized tribes have reportedly filed supporting legal briefs in related proceedings, highlighting the broader significance of the dispute.
The case also unfolds alongside separate legal challenges involving prediction markets in multiple states, meaning several courts are simultaneously evaluating different aspects of the industry’s legal foundation.
The eventual outcome could influence how prediction markets operate not only on tribal lands but across the broader U.S. regulatory landscape.
Outlook
The lawsuit brought by California tribes introduces a new legal challenge that differs significantly from previous state-level disputes over prediction markets.
Rather than focusing on state gambling laws, the case examines how federal tribal gaming protections interact with the Commodity Exchange Act and CFTC oversight.
As the Ninth Circuit considers its decision, the ruling could have lasting implications for prediction market exchanges, tribal gaming rights, and the broader regulatory framework governing event-based financial contracts in the United States.
