The state’s largest public employee pension fund reported an investment return of 2.15 percent for the past fiscal year, falling short of its investment target of 7.5 percent, The Des Moines Register reported. “It’s been a challenging couple of years with the continued low interest rate environment,” IPERS CEO Donna Mueller said. While the annual return was well below its long-term goal,  over the past 30 years IPERS has had an annualized investment return of 8.6 percent. The retirement fund, which has 325,000 members, had a market value of $28.27 billion for the 12 months that ended June 30.   Read an article about IPERS at BusinessRecord.com.