Tenn. Code Ann. § 35-3-103: Federal and state securities

(a) Investments may be made in bonds, notes and stock of the United States and any state and territory of the United States.

(b) In the absence of an express provision to the contrary, if an indenture or other governing instrument directs, requires, authorizes or permits investment in United States government obligations, a bank, trust company, trust department or other fiduciary may invest in the obligations, either directly or in the form of securities or other interests in any open end or closed end management type investment company or investment trust registered under the federal Investment Company Act of 1940 ( 15 U.S.C. § 80a-1 et seq.), if the portfolio of the investment company or investment trust is limited to United States government obligations and to repurchase agreements fully collateralized by the obligations and if the investment company or investment trust actually takes delivery of the collateral, either directly or through an authorized custodian.