Two of the most powerful financial regulators in the US are asking the public to weigh in on one of the more arcane corners of market structure, and the timing is not accidental. The SEC and CFTC have jointly requested public comments aimed at harmonizing portfolio margining frameworks, a move that sits at the center of a broader effort to modernize how derivatives are regulated across both agencies.
Portfolio margining is essentially a smarter way to calculate how much collateral a trader has to post. Instead of treating each position in isolation, it looks at a portfolio as a whole and nets out offsetting risks. The current patchwork of rules makes that logic harder to apply in practice.
How we got here
The two agencies signed a Memorandum of Understanding on March 11, 2026, establishing a framework to clarify product definitions and modernize margin rules across their respective jurisdictions. That MOU set the stage for what followed.
By late April and into mid-May, CFTC leadership was already signaling that joint requests on portfolio margining were imminent. On June 18, both agencies released formal joint requests for comment on harmonizing derivatives product definitions, with portfolio margining as a priority focus area.
