Okla. Stat. tit. 36, § 36-1512: Valuation of other securities

A. Securities, other than those referred to in Section 1511 of

this article, held by an insurer shall be valued, in the discretion

of the Insurance Commissioner, at their market value, or at true

book value, all consistent with any current method for the valuation

of any such security formulated or approved by the National

Association of insurance Commissioners.

B. Preferred or guaranteed stocks or shares while paying full

dividends may be carried at a fixed value in lieu of market value,

at the discretion of the Insurance Commissioner and in accordance

with such method of computation as he may approve.