CFTC Files Massachusetts Brief to Defend Federal Control of Prediction Markets

The Commodity Futures Trading Commission said on April 24 that it filed an amicus brief in the Massachusetts Supreme Judicial Court in Commonwealth of Massachusetts v. KalshiEx LLC, arguing that the agency has exclusive jurisdiction over U.S. commodity derivatives markets, including event contracts often described as prediction markets. The filing adds Massachusetts to a growing list of states where the CFTC is pushing back against local enforcement efforts aimed at federally regulated exchanges.

According to the agency, the brief argues that the Commodity Exchange Act creates a comprehensive federal framework that preempts state laws when they are applied to CFTC-regulated markets. The commission also pointed to its recent lawsuits against Arizona, Connecticut, Illinois, and New York, and said it has already won a temporary restraining order in Arizona tied to similar claims.

The dispute matters because prediction-market access depends heavily on whether exchanges face one regulator or many. If states can separately challenge event contracts already listed on a CFTC-regulated venue, platforms may hesitate to expand products and traders may face a patchwork of availability rules depending on where they live.

Why it matters

For traders, this is really a market-access story. A stronger federal preemption argument could make event-contract listings more stable, while the opposite outcome could create legal uncertainty around which contracts stay live and where.

What to watch next

Watch for the Massachusetts court’s response and for whether other state cases keep moving toward the same preemption question. That legal path will shape how far regulated prediction markets can expand in the U.S.