Okla. Stat. tit. 74, § 74-1226.11: Bonds as securities - Investment of funds

Bonds issued under the provisions of this act 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.