U.S. aluminum prices are starting to factor in the prospect of new tariffs on imports from Canada according to S&P Global Platts. That’s become a possibility after U.S. imports of aluminum from Canada surged in the wake of an exemption granted from section 232 tariffs and comes as the U.S.-Mexico-Canada Agreement trade deal has come into force. A prior agreement between the U.S. and Canada states tariffs can return if imports “surge meaningfully with consideration of market share”. U.S. imports from Canada of all aluminum products climbed 29.6% year over year in the three months to May 3...