Okla. Stat. tit. 69, § 69-1715: Investments in bonds

Bonds issued under the provisions of this article are hereby

made securities in which all public officers and public bodies,

agencies, and instrumentalities of the state and its political

subdivisions, all banks, trust companies, trust and loan

associations, investment companies, and others carrying on a banking

business, and all insurance companies and insurance associations,

and others carrying on an insurance business, may legally and

properly invest funds including capital in their control or

belonging to them.