undistributed personal holding company income
For purposes of this part, the term “undistributed personal holding company income” means the taxable income of a personal holding company adjusted in the manner provided in subsections (b), (c), and (d), minus the dividends paid deduction as defined in section 561. In the case of a personal holding company which is a foreign corporation, not more than 10 percent in value of the outstanding stock of which is owned (within the meaning of section 958(a)) during the last half of the taxable year by United States persons, the term “undistributed personal holding company income” means the amount determined by multiplying the undistributed personal holding company income (determined without regard to this sentence) by the percentage in value of its outstanding stock which is the greatest percentage in value of its outstanding stock so owned by United States persons on any one day during such period.