(a) Under the standard of care provided by § 815.307, Government Code, the board of trustees may manage and has full power to invest and reinvest the money in:
(1) the employees life, accident, and health insurance and benefits fund;
(2) the state employees cafeteria plan trust fund; and
(3) the employees’ health care stabilization trust fund.
(b) The earnings, including interest on money in the fund and proceeds from the sale of any investments, become a part of the fund.