( September 1, 2026, 11:23 AM EDT) -- PASADENA, Calif. — Reviving a class action focused on the management of a multiemployer plan that used a single investment pool, the Ninth Circuit U.S. Court of Appeals said in an unpublished memorandum that the trial court “did not have the benefit of” a decision in which the appellate court subsequently addressed how to assess claims concerning the duty of prudence under the Employee Retirement Income Security Act....