LONDON, March 11 (Reuters) - Price premiums for aluminium on the physical market in the United States soared to a record high above $990 a metric ton on Tuesday after President Donald Trump said he would double planned tariffs on Canadian metal to 50%.
Canadian smelters account for the bulk of primary and alloyed aluminium exports to the United States, 70% of 3.92 million tons last year, according to information provider Trade Data Monitor.