Investment companies.
(ii) Investment companies. Assets described in paragraph (f)(1)(iii) of this section shall be presumed to be used or held for use in an entity's trade or business if the principal business of the entity is trading or investing in such assets for its own account. An entity's principal business shall be presumed to be trading or investing in assets described in paragraph (f)(1)(iii) of this section if the fair market value of such assets held by the entity equals or exceeds 90 percent of the sum of the fair market values of the entity's U.S. real property interests, interests in real property located outside the United States, assets otherwise used or held for use in trade or business, and assets described in paragraph (f)(1)(iii) of this section.