Wisconsin State Investment Board, Madison, is searching for a consultant to provide monitoring and performance reporting services for its $1.8 billion real estate portfolio, spokeswoman Vicki Hearing said. Incumbent Russell Investment Group's contract expires April 1. Russell isn't rebidding because it is exiting from such limited consulting work, said Christopher J. Phillips, manager-public relations. The RFP is available at www.swib.state.wi.us. Deadline for proposals is Feb. 7. Officials for the $70 billion fund could make a decision in February or March.