[CFTC Submits Amicus Brief to Massachusetts Court Reaffirming Regulatory Authority] According to an announcement on the CFTC's official website, the CFTC submitted an amicus brief to the Massachusetts Supreme Judicial Court on April 24, reaffirming its exclusive jurisdiction over the commodity derivatives market (including prediction markets). CFTC Chairman Michael S. Selig stated that Congress has granted the CFTC sole regulatory authority and warned that state-level interference would face legal challenges. The brief outlines the legislative history and framework establishing the Commodity Exchange Act's precedence over state laws.