( December 5, 2025, 8:08 AM EST) -- PASADENA, Calif. — The Ninth Circuit U.S. Court of Appeals will hear Dec. 9 oral argument in an appeal where retirement plan participants who filed an Employee Retirement Income Security Act class action over proprietary target date funds (TDFs) lost on all counts following a bench trial; among other things, the participants seek vacatur of an order taxing them with nearly $94,000 in costs....