Shares of industrial and transportation companies fell as the U.S. and Canada headed towards a trade war.

Canadian officials said that effective Sept. 8, or the day after Labor Day, Canada plans to place tariffs ranging between 15% and 50% on about $20 billion of U.S. goods, including steel, aluminum and motorcycles.

Hyundai reached a tentative wage agreement with its labor union, ending months of on-and-off walkouts that have disrupted production.

Write to Rob Curran at rob.curran@dowjones.com

(END) Dow Jones Newswires