Iowa Public Employees' Retirement System's investments returned 10.12% for the fiscal year ended June 30, according to a statement by the Des Moines-based pension fund.
The pension fund's assets rose to $24.8 billion from $23.2 billion a year earlier.
IPERS's annual return as well as its 30-year annualized return of 9.57% surpassed the pension fund's 7.5% actuarial assumed return, Donna M. Mueller, IPERS CEO, said in the statement.
Investment benchmark comparisons were not immediately available.