Iowa Public Employees' Retirement System, Des Moines, expects to hire global multistrategy, multiasset managers to run a total of $400 million in absolute return strategies that will be part of a portable alpha portfolio. Officials of the $21 billion system are looking for two managers, although that number could change, according to the system's website. System officials hope to make selections in June. Wilshire Associates is assisting. Further details could not be learned by press time.