The Washington State Investment Board, Olympia, is searching for a firm to provide global custody and securities lending services for the $73 billion system, which includes the $55.65 billion retirement commingled trust fund. The firm, which would have separate contracts for each service, will start Oct. 1, 2007, and can be extended up to two times for an additional year each. State Street, the current provider, is eligible to rebid, said Liz Mendizabal, WSIB spokeswoman. State Street's contract expires Sept. 30, 2007. Letters of intent to bid are due by 4:30 p.m. PST Nov. 13, and proposals are due by 4:30 p.m. PST Dec. 18. More information is available at www.sib.wa.gov/opportunities/rfp_co.html. Semifinalists will be notified around Jan. 5, but fund officials haven't determined a timeframe for choosing finalists, according to the RFP.