Mo. Rev. Stat. § 70.746
Notwithstanding any other provision of law to the contrary, the board of trustees may delegate to its duly appointed investment counselor authority to act in place of the board in the investment and reinvestment of all or part of the moneys of the system, and may also delegate to such counselor the authority to act in place of the board in the holding, purchasing, selling, assigning, transferring, or disposing of any or all of the securities and investments in which such moneys shall have been invested, as well as the proceeds of such investments and such moneys. Such investment counselor shall be registered as an investment advisor with the United States Securities and Exchange Commission. In exercising or delegating its investment powers and authority, members of the board shall exercise ordinary business care and prudence under the facts and circumstances prevailing at the time of the action or decision. In so doing, the board shall consider the long- and short-term needs of the system in carrying out its purposes, the system's present and anticipated financial requirements, the expected total return on the system's investment, general economic conditions, income, growth, long-term net appreciation, and probable safety of funds. No member of the board shall be liable for any action taken or omitted with respect to the exercise of or delegation of these powers and authority if such member shall have discharged the duties of his or her position in good faith and with that degree of diligence, care, and skill which prudent men and women would ordinarily exercise under similar circumstances in a like position.
§ 70.746, RSMo