U.S.-Canada Tariffs Take Effect: Global Risk Premia Reach Long-Dated African Eurobonds

The United States has imposed 50% tariffs on approximately $20 billion of Canadian goods after trade negotiations collapsed, with Canada announcing dollar-for-dollar retaliation on selected U.S. imports from September 8. Additional U.S. duties on specified Canadian alcohol, dairy and motor-vehicle imports also took effect on August 22. The escalation raises the risk of higher bilateral trade costs, supply-chain disruption and weaker North American growth.

For African external credit, the transmission is indirect but material: a deterioration in global risk sentiment can increase demand for safe-haven assets and tighten funding conditions for lower-rated borrowers. Higher global risk premia would raise the discount rate applied to African Eurobonds, with the greatest duration sensitivity in long-dated Ghanaian and Kenyan dollar bonds. The same channel can widen refinancing premia for issuers approaching external amortisation or dependent on renewed primary-market access.

The relevant distinction is between duration exposure and immediate trade exposure. African exporters are not directly subject to the announced tariffs in the supplied evidence, but their Eurobonds can still reprice if the USMCA dispute reinforces a broader retreat from emerging-market risk. Higher external funding costs would be more consequential for higher-beta sub-Saharan sovereign credit than for supranational or stronger-rated African exposure, where spread sensitivity is typically lower.

The next conditional signal is whether retaliation remains limited to the announced sectors or expands into a wider USMCA rupture. A broader escalation would increase the probability of weaker global growth, more restrictive financing conditions and further pressure on long-dated African external debt, while a contained dispute would limit the channel primarily to risk-premium repricing.