sale or exchange
(8) Gain or loss of foreign persons from sale or exchange of certain partnership interests (A) In general Notwithstanding any other provision of this subtitle, if a nonresident alien individual or foreign corporation owns, directly or indirectly, an interest in a partnership which is engaged in any trade or business within the United States, gain or loss on the sale or exchange of all (or any portion of) such interest shall be treated as effectively connected with the conduct of such trade or business to the extent such gain or loss does not exceed the amount determined under subparagraph (B). (B) Amount treated as effectively connected The amount determined under this subparagraph with respect to any partnership interest sold or exchanged— (i) in the case of any gain on the sale or exchange of the partnership interest, is— (I) the portion of the partner’s distributive share of the amount of gain which would have been effectively connected with the conduct of a trade or business within the United States if the partnership had sold all of its assets at their fair market value as of the date of the sale or exchange of such interest, or (II) zero if no gain on such deemed sale would have been so effectively connected, and (ii) in the case of any loss on the sale or exchange of the partnership interest, is— (I) the portion of the partner’s distributive share of the amount of loss on the deemed sale described in clause (i)(I) which would have been so effectively connected, or (II) zero if no loss on such deemed sale would be have been so effectively connected. For purposes of this subparagraph, a partner’s distributive share of gain or loss on the deemed sale shall be determined in the same manner as such partner’s distributive share of the non-separately stated taxable income or loss of such partnership. (C) Coordination with United States real property interests If a partnership described in subparagraph (A) holds any United States real property interest (as defined in section 897(c)) at the time of the sale or exchange of the partnership interest, then the gain or loss treated as effectively connected income under subparagraph (A) shall be reduced by the amount so treated with respect to such United States real property interest under section 897. (D) Sale or exchange For purposes of this paragraph, the term “sale or exchange” means any sale, exchange, or other disposition. (E) Secretarial authority The Secretary shall prescribe such regulations or other guidance as the Secretary determines appropriate for the application of this paragraph, including with respect to exchanges described in section 332, 351, 354, 355, 356, or 361.