State of Wyoming Loan and Investment Board, Cheyenne, is searching for an S&P 500 index manager to handle $300 million to $500 million for the $3.7 billion permanent fund, said Sandra Hudson, financial analyst. The funding source has not been determined. The RFP is available from the board or the state treasurers office. Proposals are due July 17, and a decision is expected to be announced in late August. RV Kuhns is assisting.