Illinois Municipal Retirement Fund's investments returned 13.7% in 2012, exceeding its customized benchmark return of 7.5%, according to a statement from the Oak Brook-based IMRF.
In 2011, IMRF's investments returned -0.29%, underperforming its customized benchmark's return of 1.48%.
IMRF, which has $28.8 billion in assets, estimates it is 85% funded, up from 80% at the end of 2011.
“These positive returns will help moderate future employer contribution rates and continue to bring us closer to our full-funding goal,” Louis W. Kosiba, IMRF executive director, said in the statement.
The 2012 return is unaudited. IMRF expects to finalize its return performance in May.