Gabby Hirz, a senior attorney in the Tax Controversy Group discusses one of the most notable decisions of third quarter 2017, Grecian Magnesite Mining v Commissioner of Internal Revenue, with Rom Watson, a partner in the Tax Group and co-head of the firm’s International practice group. Grecian Magnesite Mining considered whether a foreign corporation’s proceeds arising from the redemption of an interest in a U.S.-based partnership were taxable in the U.S. as U.S.-source income or income effectively connected with a U.S. trade or business (ECI). In doing so, the Tax Court called into question the validity a 30-year old revenue ruling.