CFTC Chair Challenges State Crackdowns on Prediction Markets as World Cup Lifts Kalshi, Polymarket Volumes to Records

The U.S. regulatory fight over prediction markets intensified as Commodity Futures Trading Commission (CFTC) Chair Michael Selig accused states of pursuing “illegal enforcement actions” against federally regulated exchanges and warned, “we will see you in court.” The escalation comes alongside a surge in trading tied to the 2026 FIFA World Cup, with Kalshi recording a record month in June and Polymarket International also posting sharp gains as tournament betting interest drew unprecedented volumes.

The Development

Federal regulators have rejected states’ attempts to police prediction markets. The following month after states’ moves, CFTC Chair Michael Selig accused state officials of “illegal enforcement actions” targeting exchanges under federal oversight, arguing that Congress granted the agency sole authority over commodity derivatives markets, including prediction markets. “To any state that seeks to nullify federal law and seize authority over these markets,” Selig said, “we will see you in court.”

The legal and policy clash is unfolding as trading accelerates. DefiLlama data show Kalshi registered nearly $9.4 billion in trading volume in June, up from about $5.3 billion in May. Polymarket International climbed to roughly $4.3 billion from about $3.5 billion a month earlier. CNBC reported the World Cup became the biggest driver of prediction market trading in June, with Dune Analytics indicating record notional volumes on Kalshi and Polymarket.

Background and Context

By March, nearly a dozen U.S. states had moved against companies including Kalshi and Polymarket. Some sought to halt the markets, while others pushed to bring them under existing gambling laws and state tax frameworks. Federal regulators have pushed back, rejecting state attempts to assert control over these markets.

Sports interest has steepened the curve. The World Cup kicked off on June 11, 2026, and is the first edition to feature 48 teams, up from 32 in prior tournaments. Knockout rounds are generating some of the highest levels of trading activity across platforms. As of Saturday, July 4, 2026, Kalshi’s Canada–Morocco Round of 16 market had generated over $48 million in trading volume, while Polymarket’s comparable market had topped $26.8 million. Interest in the United States’ Round of 16 match is also strong: Kalshi’s market on which team will advance had more than $2.1 million in volume, and a similar market on Polymarket had attracted around $1.6 million as of the same date.

Industry Reaction

The debate has widened beyond regulators. In June, casino operators, tribal organizations and labor groups urged Congress to remove sports‑event contracts from the CFTC’s authority through an amendment to the Digital Asset Market Clarity (CLARITY) Act, arguing that such contracts should remain under state gambling laws and established gaming oversight.

Europe is charting its own course. On Friday, the European Securities and Markets Authority (ESMA) reminded firms that many event contracts may already fall under existing restrictions on binary options. ESMA emphasized that regulatory treatment depends on product characteristics rather than the “event contract” label itself.

Potential Impact

The jurisdictional contest between federal derivatives oversight and state gambling frameworks could shape how prediction markets operate in the United States. The outcome may influence which products qualify as commodity derivatives overseen at the federal level and which would instead be treated as gambling subject to state rules and tax treatment. Market participants are watching closely as record sports‑related activity intersects with a live policy battle over where these venues fit within existing legal structures.

The heightened volumes around high‑profile matches illustrate how quickly liquidity can concentrate in event‑based markets. That trend, coupled with ongoing regulatory scrutiny, places a spotlight on market design, transparency and risk controls. Firms active in these venues face a shifting environment in which product categorization—and the applicable supervisory regime—remains central to business strategy and investor access.

Legal and Compliance Implications

For U.S. platforms, the key legal question is whether federal commodities and derivatives law or state gambling statutes take precedence for event‑based contracts. According to Selig, Congress granted the CFTC sole authority over commodity derivatives markets, including prediction markets; he characterized recent state actions as unlawful. States, by contrast, have pursued measures to halt certain markets or to bring them within gambling and tax frameworks. How courts interpret those competing claims will bear directly on licensing pathways, permissible product sets and where trading can occur.

On the legislative front, the June push by casino operators, tribal organizations and labor groups to carve sports‑event contracts out of the CFTC’s remit via a CLARITY Act amendment signals that statutory adjustments are on the table. Any such change would recalibrate federal‑state boundaries for these products and could reassign supervisory responsibilities.

In the European Union, ESMA’s reminder that event contracts may fall under existing binary options restrictions frames the issue through an established retail‑investor protection lens. ESMA’s position that regulation depends on product characteristics rather than nomenclature places emphasis on how contracts are structured, the risks they pose and the investor cohort they target.

What’s Next

With knockout‑stage World Cup markets drawing some of the highest trading activity and the United States and Canada featuring in widely traded fixtures as of Saturday, July 4, 2026, market attention is likely to remain elevated. The policy environment remains fluid: CFTC leadership has signaled readiness to litigate state actions it views as unlawful, industry groups have asked Congress to exclude sports‑event contracts from the CFTC’s authority through a CLARITY Act amendment, and ESMA has clarified how many event contracts could be treated under existing binary options rules.

For investors, exchanges and compliance teams, the central task is monitoring how these parallel U.S. and EU debates translate into concrete obligations. The direction of travel—through courts, Congress and supervisory guidance—will determine where event‑based trading can occur, which products are permitted, and the safeguards required to support continued participation in prediction markets.