The state investment board shall provide for the investment of all funds of the Washington public employees' retirement system, the teachers' retirement system, the school employees' retirement system, the Washington law enforcement officers' and firefighters' retirement system, the Washington state patrol retirement system, the Washington judicial retirement system, the Washington public safety employees' retirement system, the higher education retirement plan supplemental benefit fund, and the judges' retirement fund, pursuant to RCW
43.84.150, and may sell or exchange investments acquired in the exercise of that authority.