Ruppert v. Alliant Energy Cash Balance Pension Plan

POSNER, Circuit Judge.

This is an appeal by the defendant in a class action suit brought by participants in a cash balance defined benefit pension plan, alleging that the plan as administered violated ERISA, and seeking recovery of benefits denied the participants as a consequence of the violation. 29 U.S.C. § 1132(a)(1)(B). The district judge granted summary judgment in favor of the class — actually classes, because the judge divided the class into two subclasses: subclass A challenges the projection rate used by the defendant, subclass B the defendant’s handling of the pre-mortality…