(1) The share of public funds of each participating public treasurer who has transferred public funds to the state treasurer for investment under Section 51-7-5, including trust funds invested by the state treasurer under this chapter, shall be calculated not less than quarterly.
(2) Income from investment of these public funds by the state treasurer, including gains or losses from the sale or exchange of investments or other properties, and net of investment fees and other charges assessed according to the schedule established by the state treasurer, shall be allocated to each participating fund on the ratio of each fund's share to the total public funds in the custody of the state treasurer determined on the basis of the average daily balance of each fund.