(a) Except as provided by Subsection (b), the following are authorized investments under this subchapter:
(1) obligations, including letters of credit, of the United States or its agencies and instrumentalities, including the Federal Home Loan Banks;
(2) direct obligations of this state or its agencies and instrumentalities;
(3) collateralized mortgage obligations directly issued by a federal agency or instrumentality of the United States, the underlying security for which is guaranteed by an agency or instrumentality of the United States;
(4) other obligations, the principal and interest of which are unconditionally guaranteed or insured by, or backed by the full faith and credit of, this state or the United States or their respective agencies and instrumentalities, including obligations that are fully guaranteed or insured by the Federal Deposit Insurance Corporation or by the explicit full faith and credit of the United States;
(5) obligations of states, agencies, counties, cities, and other political subdivisions of any state rated as to investment quality by a nationally recognized investment rating firm not less than A or its equivalent;
(6) bonds issued, assumed, or guaranteed by the State of Israel;
(7) interest-bearing banking deposits that are guaranteed or insured by:
(A) the Federal Deposit Insurance Corporation or its successor; or
(B) the National Credit Union Share Insurance Fund or its successor; and
(8) interest-bearing banking deposits other than those described by Subdivision (7) if:
(A) the funds invested in the banking deposits are invested through:
(i) a broker with a main office or branch office in this state that the investing entity selects from a list the governing body or designated investment committee of the entity adopts as required by § 2256.025; or
(ii) a depository institution with a main office or branch office in this state that the investing entity selects;
(B) the broker or depository institution selected as described by Paragraph (A) arranges for the deposit of the funds in the banking deposits in one or more federally insured depository institutions, regardless of where located, for the investing entity’s account;
(C) the full amount of the principal and accrued interest of the banking deposits is insured by the United States or an instrumentality of the United States; and
(D) the investing entity appoints as the entity’s custodian of the banking deposits issued for the entity’s account:
(i) the depository institution selected as described by Paragraph (A);
(ii) an entity described by § 2257.041(d); or
(iii) a clearing broker dealer registered with the Securities and Exchange Commission and operating under Securities and Exchange Commission Rule 15c3-3 (17 C.F.R. § 240.15c3-3).
(b) The following are not authorized investments under this section:
(1) obligations whose payment represents the coupon payments on the outstanding principal balance of the underlying mortgage-backed security collateral and pays no principal;
(2) obligations whose payment represents the principal stream of cash flow from the underlying mortgage-backed security collateral and bears no interest;
(3) collateralized mortgage obligations that have a stated final maturity date of greater than 10 years; and
(4) collateralized mortgage obligations the interest rate of which is determined by an index that adjusts opposite to the changes in a market index.