Dollar Crunch: How the Hormuz Oil Shock Is Triggering Currency Crises Across Africa

There is a mechanism in global economics so well understood, so consistently documented, and so reliably devastating to developing nations that it has its own literature and its own category of IMF programme — and yet, every time a major global energy price shock occurs, it plays out again with the same consequences for the same vulnerable economies. The mechanism is this: oil is priced in dollars; poor nations with weak currencies need dollars to buy oil; when oil prices rise, they need more dollars; when they need more dollars, their currencies fall; when their currencies fall, everything they import — including oil — becomes even more expensive in local currency terms. It is a vicious cycle, and it is happening right now across sub-Saharan Africa with particular severity.

The Currency Data

Since the Strait of Hormuz closure began on 28 February, a significant number of African currencies have fallen materially against the U.S. dollar. Nigeria's naira has lost approximately 8% of its value. Ghana's cedi has fallen 11%. Kenya's shilling has dropped to its lowest level since the 2022 emergency IMF drawing. The Tanzanian shilling, Ugandan shilling, and Zambian kwacha have all weakened by 5–9%. In Ethiopia, where the economy was already under severe strain from the Tigray conflict's aftermath and debt restructuring negotiations, the birr has fallen 14%.

These are not small movements. For countries where a significant portion of the population lives on local-currency incomes, a 10% currency depreciation against the dollar translates directly into a 10% increase in the cost of all dollar-priced imports — which, in many African economies, includes not just fuel and fertilisers but also pharmaceuticals, medical equipment, food staples, and industrial inputs. The cumulative inflation effect of currency depreciation and higher commodity prices is arriving simultaneously, creating a cost-of-living shock that household budgets across the continent are poorly equipped to absorb.

The Debt Dimension

Currency depreciation also worsens the position of governments and corporations that have borrowed in dollars — and there are many. The Eurobond issuance boom of the 2010s left many African sovereign borrowers with significant dollar-denominated debt obligations. When the local currency falls, the local-currency cost of servicing that debt rises proportionally. For governments already running fiscal deficits and facing IMF conditionality requirements, the double shock of higher import costs and higher debt service costs is potentially the trigger for debt distress.

Zambia, which only recently completed a debt restructuring after defaulting in 2020, is particularly exposed. Ghana, which began its own IMF programme in 2023, faces renewed fiscal stress. Egypt, which has been through multiple IMF programmes in the past decade, is managing a currency under severe pressure with foreign exchange reserves that provide limited cover. In each case, the Hormuz crisis has not created the vulnerability — it has exposed and accelerated a vulnerability that pre-existed the current shock.

The Remedies That Are Available — and Their Limits

The standard policy toolkit for managing a currency crisis — raising interest rates to attract foreign capital and defend the exchange rate, drawing on foreign exchange reserves to intervene in the currency market, seeking IMF support — is available to African governments, but each tool carries costs. Higher interest rates slow domestic economic activity at exactly the moment when households are already under pressure. Foreign exchange reserves are limited and cannot be depleted indefinitely. IMF programmes come with conditionality requirements — fiscal consolidation, subsidy reduction, public sector wage restraint — that are politically toxic and economically painful in a context of already-rising prices and falling real incomes.

The honest assessment is that the majority of African governments facing currency pressure right now have limited good options. They are managing the consequences of a global shock they did not create, with limited resources and limited international support, while their populations pay the price. That is not a new situation. It is, however, an ongoing indictment of a global economic order that consistently externalises the costs of wealthy-nation decisions onto those least equipped to bear them.