According to The Block, the SEC filed an amicus curiae brief this week supporting the CFTC in a lawsuit brought by the Capital Markets Coalition (CMA) seeking to vacate the approval of single-stock perpetual derivatives. The SEC stated that related CFTC rule changes are also subject to its review and that the two agencies frequently cooperate, while pushing back against the CMA's characterization that the CFTC is acting out of control and the SEC is absent. Regulatory jurisdiction and the validity of the approval remain contested in the litigation, and the brief does not constitute a court ruling.