Canada’s 50 percent tariffs take effect. $27.6 billion of American goods.

Canada’s retaliatory tariffs on $27.6 billion of American goods took effect just after midnight Eastern, a dollar-for-dollar answer to the 50 percent U.S. duties Washington put on Canadian products on Aug. 22. The rates are 15, 25 and 50 percent, matched to the American list. CNBC timed the clock to Tuesday. Trade talks collapsed at the end of August. The corridor that used to be a quiet $382 billion monument is now a customs form.

Steel, aluminum and iron products doubled to 50 percent. Furniture, motorcycles, clothing and some beauty goods — perfume, sunscreen, makeup — took the top rate. Dairy: 50 percent on milk and cream, 25 percent on fresh cheese. Softwood, including pine, fir and spruce, 25 percent. Appliances, agricultural equipment, pulp, paper, electronics. About 700 lines. Existing 25 percent Canadian duties on autos stay. Goods already in transit on Tuesday are exempt. The rest of the truck pays.

Our dollar-for-dollar, rate for rate counter-tariffs as well as multi-billion dollar support package will protect workers, farmers, families and businesses.

Finance Minister François-Philippe Champagne called it protection for workers, farmers, families and businesses. Prime Minister Mark Carney has said Canada will not be held hostage. The American list that started this round ran from hockey sticks and cement to honey. The president has floated renaming Lake Ontario “Lake America.” Ottawa is not amused. The Economy desk files the receipt, not the nickname.

U.S. exchanges reopened after Labor Day into the same morning: a Houthi fire under Saudi oil, Brent near $100, the Dow lower, the 10-year around 4.8 percent. CPI prints Friday. A soybean farmer already counting extra diesel now has a northern tariff on the same harvest. Michigan and Maine sit next to this war. The midterm is eight weeks out. A 50 percent duty does not wait for November.