Ohio Public Employees Retirement System, Columbus, issued RFIs for high-yield bond managers. The $64.5 billion system plans to hire two or three managers to handle a total of $200 million to $500 million. The plan does have some high-yield exposure in its $14 billion global bond portfolio, but this will be its first dedicated commitment to high yield, which is being added for diversification, said Richard Baker, spokesman. The RFIs, available at www.opers.org, are due April 8, and managers should be selected in September. Ennis, Knupp is assisting.