▼Tariff Retaliation Between Allies

Score history

Daily conviction score, 0 to 100. Higher means the thesis is more strongly corroborated.

Now 34 · -2 since Sep 13 · ranged 34 to 36

Showing the last few days. Unlock full score history.

Why the conviction moved

• Sep 9
  Strengthened +4

  The US-Canada exchange — a $20 billion Canadian retaliation list followed by an American import ban on dairy, motorcycles and alcohol — is retaliation between treaty allies escalating in lockstep on a weekly cadence. Firms on both sides now face duplicated sourcing in categories where cross-border integration was assumed permanent.

• Sep 8
  Strengthened +5

  Canada's retaliatory tariffs took effect on roughly $20 billion of US goods, doubling steel and aluminum duties to 50 percent across about 700 product lines, with Washington signaling a further round. Allied-on-allied retaliation is now mutual and codified at the line-item level, which forces North American manufacturers to duplicate sourcing rather than absorb a one-off levy.

Source trail

• Supporting · September 9, 2026

  Washington Bans Canadian Dairy, Motorcycles and Most Alcohol as Trade War Widens

  The US-Canada exchange — a $20 billion Canadian retaliation list followed by an American import ban on dairy, motorcycles and alcohol — is retaliation between treaty allies escalating in lockstep on a weekly cadence. Firms on both sides now face duplicated sourcing in categories where cross-border integration was assumed permanent.

  Financial Times

• Supporting · September 8, 2026

  Canada's Retaliatory Tariffs Take Effect on About $20 Billion of American Goods

  Canada's retaliatory tariffs took effect on roughly $20 billion of US goods, doubling steel and aluminum duties to 50 percent across about 700 product lines, with Washington signaling a further round. Allied-on-allied retaliation is now mutual and codified at the line-item level, which forces North American manufacturers to duplicate sourcing rather than absorb a one-off levy.

  Al Jazeera