Full text
the cost to the taxpayer of any preferred shares of any class of the capital stock of the corporation receivable by the taxpayer as consideration for the disposition shall be deemed to be the lesser of the fair market value of those shares immediately after the disposition and that proportion of the amount, if any, by which the proceeds of the disposition exceed the fair market value of the consideration (other than shares of the capital stock of the corporation or a right to receive any such shares) received by the taxpayer for the disposition, that