Alameda County Employees Retirement Association, Oakland, Calif., narrowed a search for a domestic enhanced index manager to two finalists, said Betty Tse, investment officer. The search is being conducted to diversify the $3.4 billion fund. Finalists are Salus and First Quadrant. Funding for the $50 million allocation is still undetermined. While the next board meeting is Aug. 19, Ms. Tse said a decision might not be made until September.