Kalshi Files Appeal Same Day New York Federal Court Denies Injunction: Round Two of Prediction Market Federal Jurisdiction Dispute Begins

On July 8, 2026, the legal battle that will determine the direction of prediction markets in the United States intensified. Kalshi filed an appeal with the Second Circuit Court of Appeals on the same day its request for an injunction to protect its sports event contracts from enforcement by New York State gambling regulators was rejected by a federal court.

This move is a crucial test for Kalshi. Arguing that its contracts are federally regulated derivatives rather than illegal gambling, Kalshi is engaged in a sophisticated legal battle between state enforcement powers and the oversight authority of the Commodity Futures Trading Commission (CFTC).

A judge in the U.S. District Court for the Southern District of New York denied Kalshi's request for an injunction against the enforcement of state gambling laws, suggesting that state authorities have the power to regulate such contracts under local gambling laws. Undeterred, Kalshi declared its strong intent to respond by filing a notice of appeal just hours after the ruling.

Kalshi's sports event contracts are 'swaps' approved by the CFTC under the Commodity Exchange Act (CEA), which falls under federal jurisdiction that takes precedence over state gambling laws.

Kalshi's core logic is based on the principle of 'conflict preemption.' That is, since the federal Commodity Exchange Act is designed to regulate specific financial products, state governments defining and banning them as gambling undermines the purpose of federal law. Kalshi emphasizes that it is a formally regulated entity that has received a Designated Contract Market (DCM) license from the CFTC.

Fragmentation of Judicial Precedents and Federal Supremacy

In 2026, various courts in the United States are issuing conflicting rulings regarding the nature of prediction markets. This defeat in New York stands in stark contrast to the victory achieved in the Third Circuit Court of Appeals last April, increasing legal uncertainty within the industry.

• January 2026: Suffolk County Court in Massachusetts ruled that Kalshi's contracts are subject to state gambling laws, siding with state authorities.
• February 19, 2026: The U.S. District Court for the Middle District of Tennessee determined that Kalshi's sports contracts constitute 'swaps' and that federal preemption principles are likely to apply.
• April 6, 2026: The Third Circuit Court of Appeals issued a landmark ruling that the Commodity Exchange Act takes precedence over state gambling laws and that the CFTC has exclusive jurisdiction.
• July 8, 2026: A New York federal court dismissed Kalshi's request for a preliminary injunction, and Kalshi filed an immediate appeal.

This judicial fragmentation poses a direct threat to Kalshi's business model. In particular, sports-related contracts account for more than 80% of Kalshi's total trading volume, so whether they are regulated in large markets like New York is a matter directly linked to the platform's profitability.

As of July 7, 2026, Kalshi holds a 73% share of the prediction market, leading Polymarket at 27%. However, depending on the outcome of the lawsuit with the New York State Gaming Commission (NYSGC), this market dominance could be shaken, which is also expected to affect the gap with competing platforms.

Strengthening Industry Integrity and Future Outlook

To dispel the concerns of regulatory authorities, Kalshi is also focusing on ensuring market integrity. On March 23, 2026, Kalshi and Polymarket demonstrated self-regulatory efforts by jointly announcing new market integrity control measures to curb insider trading and restrict the participation of those with access to non-public information.

Depending on whether the Second Circuit Court of Appeals follows the precedent of the Third Circuit or upholds the New York court's dismissal, this case is likely to reach the Supreme Court. The prediction market industry is closely watching the ruling process, viewing the outcome of this appeal as the final guideline for legal operations within the United States.