"For the 12 months ended December 31, 2014, Corporate ERISA plans generally performed best among all plan types with a median return of 8.5 percent. Public Funds had a median return of 6.8 percent for the year ... Following slightly negative returns in the third quarter, all plan types at the median had a positive fourth quarter. Corporate ERISA plans gained 2.4 percent at the median in the fourth quarter, while Public Funds gained 1.3 percent."