SEC backs CFTC in court fight over single-stock perpetual futures

Washington's two market regulators usually argue over turf. This time, one is defending the other in court. The SEC has filed an amicus brief supporting the CFTC, which is being sued over its approval of single-stock perpetual futures. The lawsuit comes from the Capital Markets Alliance Association, whose members include Cboe and Citadel Securities.

Product definition at stake

A traditional futures contract has a set expiration date, while a perpetual future has no deadline, allowing positions to stay open indefinitely. The CFTC approved single-stock versions after a 45-day review under Regulation 40.3, classifying them as security futures under the Commodity Futures Modernization Act of 2000.

The Capital Markets Alliance Association disagrees with that classification. Its lawsuit, filed November 3, 2026, argues the contracts are actually security-based swaps, which would place them under SEC jurisdiction. The plaintiffs' reasoning hinges on delivery obligations, claiming that a contract with no expiration never creates such obligations.

Regulatory alignment

The SEC's brief cuts against the plaintiffs' framing, as the lawsuit argues these products belong under SEC oversight. The SEC's support suggests the agencies are comfortable with their current arrangement, as security futures are already jointly overseen by both regulators—a rare occurrence in US market regulation.

Industry divides

Other amicus briefs split along predictable lines. Coinbase Derivatives and Kalshi filed in support of the CFTC, while Better Markets and a group of former SEC officials opposed the approval. The plaintiff group includes established players like Cboe and Citadel Securities, while the defenders come largely from the crypto and prediction-market world.

Crypto-native platforms like Coinbase Derivatives, KalshiEX and Bitnomial Exchange are positioned to list these contracts, with two of those firms arguing for the CFTC in court, making their interest in the outcome clear.

Market implications

If the plaintiffs win and the contracts are deemed security-based swaps, regulatory requirements would change significantly. Securities rules generally carry tougher investor protections than the current framework, potentially leading to more scrutiny of how these contracts are offered.

For platforms like Coinbase Derivatives, Kalshi and Bitnomial, a ruling against the CFTC could mean reworking or removing a product line that was previously approved. The court has already signaled that plaintiffs are likely to succeed on their claim but has not yet ruled on the merits, leaving platforms operating in a regulatory gray area.