(Reuters) - The U.S. Commodity Futures Trading Commission plans to publish a rule about vertically integrated models within a holding company by summer, Chairman Rostin Behnam said Tuesday.

The rule should address "the opportunity for there to be a vertically integrated stack, but also have sufficient amount of conditions that you would have the entity walled off from other entities," Behnam said.

(Reporting by Carolina Mandl and Hannah Lang in Washington)