Tariffs Spark Steep Declines in Stock Futures; Oil and Dollar Climb - WSJ

1. U.S. imposes new tariffs, causing stock futures to fall sharply. 2. 25% tariffs on Canadian & Mexican goods could hurt various sectors. 3. Auto industry, especially companies relying on imports, faces significant risks. 4. Investors worry about retaliatory measures from Canada and China. 5. The stronger dollar may pressure U.S. firms selling abroad.