(1) Securities, other than those referred to in WAC 284-13-210, held by an insurer shall be valued, in the discretion of the commissioner, at their market value, or at their appraised value, or at prices determined by the commissioner as representing their fair market value.

(2) 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 commissioner and in accordance with such method of valuation as he or she may approve.

(3) Stock of a subsidiary corporation of an insurer shall not be valued at an amount in excess of the net value thereof as based upon those assets only of the subsidiary which would be eligible under chapter 48.13 RCW for investment of the funds of the insurer directly.

(4) No valuations under this section shall be inconsistent with any applicable valuation or method then currently formulated or approved by the National Association of Insurance Commissioners or its successor organization.