 Foreign steel shipped through Mexico will now be subject to a 25% levy, while transshipments of aluminum will face a 10% tariff. China is exporting more cars, which is helping to offset a slump in its domestic auto sales. China's vehicle exports in June were up 29% from a year ago. Federal Reserve Chairman Jerome Powell is back on Capitol Hill today, fielding questions from a House committee about the economy. Yesterday, Powell told a Senate panel he's encouraged by signs of falling inflation.