Tariffs at Century-High Levels: The IMF's Verdict on the New Trade War

Who Bears the Cost?

The burden of higher tariffs does not fall equally. Small, open economies that depend on exports for a large share of GDP — Vietnam, Malaysia, Mexico, and several sub-Saharan African nations — face disproportionate exposure. Larger domestic markets have more cushion. But even large economies absorb real costs through reduced export competitiveness and higher input prices for manufacturers relying on imported components.

For emerging markets, the impact is compounded. Many lack the fiscal resources to cushion populations against higher import prices. A tariff applied in Washington disrupts not just US consumers — it displaces the export revenues and employment of developing-country suppliers far from where the tariff was imposed. The World Bank estimates that trade disruption disproportionately harms economies where export revenues fund essential public services.

Trade Diversion and Supply Chain Restructuring

One significant economic consequence of high tariffs is trade diversion — the redirection of trade flows away from efficient producers toward tariff-exempt alternatives. When the United States imposes tariffs on Chinese goods, buyers shift sourcing to Vietnam, Mexico, or India — not because those producers are necessarily more efficient, but because they face lower tariff barriers. The global production network becomes less efficient overall, even as bilateral trade between specific country pairs can increase.

This is generating a significant restructuring of global supply chains. Companies are investing in near-shoring — relocating production closer to their main markets — and friend-shoring — prioritising sourcing from politically aligned countries. These are rational responses to tariff risk, but they are expensive: unwinding decades of supply chain optimisation requires substantial capital investment and takes years to complete. During the transition, production costs rise for everyone.

The semiconductor industry illustrates this clearly. Advanced chips had been concentrated in East Asian production hubs because that was economically optimal. Government subsidies and trade restrictions are now creating new capacity in the United States and Europe — at considerably higher cost. The efficiency loss is real and permanent; it simply becomes an accepted cost of supply chain security.

What Comes Next

The IMF and WTO have both called for de-escalation and a return to rules-based trade frameworks. What economics is unambiguous about: sustained high tariffs reduce global efficiency, make production more expensive, reduce the specialisation gains that underpin trade's mutual benefits, and — when retaliatory cycles continue — can contract global trade volumes in ways that harm every economy.

For businesses, the practical response has been to shorten supply chains, near-shore production, and diversify sourcing. In the interim, uncertainty itself suppresses investment. Firms cannot commit to long-term capital expenditure when the rules governing international trade may change quarter to quarter.

The Takeaway

Tariffs are not abstract policy. They raise prices on consumer goods and industrial inputs, slow growth, complicate central bank decision-making, and generate retaliatory spirals that harm everyone involved. The IMF's April 2025 verdict was direct: the current escalation is one of the most significant risks to global economic stability in a generation. The historical record from the 1930s provides a stark reminder of where unchecked tariff escalation can lead — and why the pressure for de-escalation, whatever the political headwinds, remains economically urgent.