A domestic insurance company may invest in securities of affiliated insurance companies or subsidiary insurance companies; provided, that any investment in securities of affiliated insurance companies or subsidiary insurance companies shall not exceed in the aggregate fifty percent (50%) of the domestic insurance company’s surplus. A domestic insurance company may invest in securities of affiliated noninsurance companies or subsidiary noninsurance companies in amounts which do not exceed the lesser of ten percent (10%) of the insurer’s assets or fifty percent (50%) of the insurer’s surplus as regards policyholders; provided, that after the investments, the insurer’s surplus as regards policyholders will be reasonable in relation to the insurer’s outstanding liabilities and adequate to its financial needs. In no event may the aggregate investment in securities of insurance or noninsurance affiliates or subsidiary companies exceed fifty percent (50%) of the domestic insurance company’s surplus.