Mealey's (December 4, 2017, 12:49 PM EST) -- SANTA ANA, Calif. — Participants and beneficiaries of a multiemployer defined contribution retirement plan on Nov. 28 filed suit in federal court under the Employee Retirement Income Security Act, alleging that the plan’s sponsor, the board of trustees and its past and present members breached their fiduciary duties by offering retail class mutual fund shares when identical lower-cost institutional class shares were available (Felipe Ybarra, et al. v. Board of Trustees of Supplemental Income Trust Fund, No. 17-2091, C. D. Calif.)....