The 2012 vintage Platinum Equity Capital Partners-A III has climbed the most for the $50 billion Pennsylvania Public School Employees’ Retirement System (PSERS) for the period Sept. 30, 2012, to Sept. 30, 2013. That vehicle was up 84.8 percentage points out of negative territory to a positive 28.72 percent IRR in 2013 from -56 percent in 2012.