Janet Yellen calls for global minimum corporate tax 5 Apr, 2021 09:00 PM 5 minutes to read US Treasury secretary Janet Yellen. Photo / AP Financial Times By: James Politi Janet Yellen, the US Treasury secretary, has called on other countries to join Washington in setting a global minimum tax for companies as she vowed to reassert America's leadership in international economic policy. "Together we can use a global minimum tax to make sure the global economy thrives based on a more level playing field in the taxation of multinational corporations, and spurs innovation, growth and prosperity," Yellen said in a speech to the Chicago Council on Global Affairs on Monday.