(a) If a subsidiary acquires stock of its parent corporation from a shareholder of the parent corporation, the acquisition of such stock shall be treated as though the parent corporation had redeemed its own stock. For the purpose of this section, a corporation is a parent corporation if it meets the 50 percent ownership requirements of section 304(c). The determination whether the amount received shall be treated as an amount received in payment in exchange for the stock shall be made by applying section 303, or by applying section 302(b) with reference to the stock of the issuing parent corporation. If such distribution would have been treated as a distribution of property (pursuant to section 302(d)) under section 301, the entire amount of the selling price of the stock shall be treated as a dividend to the seller to the extent of the earnings and profits of the parent corporation determined as if the distribution had been made to it of the property that the subsidiary exchanged for the stock. In such cases, the transferor's basis for his remaining stock in the parent corporation will be determined by including the amount of the basis of the stock of the parent corporation sold to the subsidiary.

(b) Section 304(a)(2) may be illustrated by the following example: