The United States and Canada have escalated their trade dispute after the U.S. government announced 50% tariffs on an estimated $20 billion worth of Canadian goods, effective immediately. Canada responded by announcing $20 billion in retaliatory tariffs targeting more than 700 U.S. goods, set to take effect on September 8.
U.S. tariffs target Canadian goods including wine, cement, and hockey sticks, while Canada’s counter-tariffs cover a broad range of U.S. imports such as dairy, seafood, appliances, wood, paper products, and clothing. The tariffs range from 15% to 50% and are framed as a response to perceived trade discrimination.
The breakdown of the new tariffs follows the collapse of U.S.-Canada trade talks, which had previously raised hopes of reducing barriers on steel and aluminum. The failure of negotiations has introduced heightened uncertainty for businesses, investors, and markets, according to economists and industry analysts.
Market reactions were initially positive for steel and materials stocks, with companies like Nucor, Steel Dynamics, Cleveland-Cliffs, and Century Aluminum seeing gains. The VanEck Steel ETF (SLX) rose 1.6% on the day of the announcement, while the State Street Materials Select Sector SPDR (XLB) reached an intraday all-time high. However, these gains were short-lived, with XLB ending the week in negative territory and SLX nearly flat. Year-to-date, both ETFs remain ahead of the S&P 500, with SLX up over 28% and XLB up over 18% as of August 28.
The U.S. cited Section 338 of the Tariff Act of 1930 as the legal authority for the new tariffs, a provision rarely used in modern trade policy. The law, originally part of the Smoot-Hawley Tariff Act, grants the president powers to impose additional duties or ban imports if a foreign country maintains or increases trade discrimination against U.S. commerce. Legal experts note that Section 338 has never been litigated, leaving its application in this context an open question.
Canadian Prime Minister Mark Carney stated that Canada would match U.S. tariffs dollar for dollar to protect workers, farmers, families, and businesses. The White House framed the tariffs as a response to long-standing trade imbalances, stating that Canada has been “ripping off the United States for decades.”
Economists warn that the escalating trade war could prolong periods of uncertainty for corporate balance sheets and stock prices. Atsi Sheth, chief credit officer at Moody’s Ratings, emphasized that the current environment is defined by unpredictability, with no clear timeline for resolution. The tariffs add to existing trade tensions and could further strain economic ties between the two nations.