WASHINGTON, D.C. - The U.S. Supreme Court on Dec. 16 denied review of a Seventh Circuit U.S. Court of Appeals ruling vacating denial of class certification to retirement plans' participants on their claims that the plans' fiduciaries breached their duties under the Employee Retirement Income Security Act by investing in a stable-value fund (SVF) that did not result in a rate of return that was sufficient for a retirement asset (Lockheed Martin Corp., et al. v. Anthony Abbott, et al., No. 13-447, U.S. Sup.).