The Cost of Decoupling: What US-China Economic Fragmentation Really Costs the World

World trade is splitting into two blocs. The United States and China, the world's two largest economies, are steadily reducing how much they depend on each other — a process economists call ‘decoupling.’ Tariffs, export controls, and restrictions on technology and investment have replaced decades of ever-deepening trade ties.

The bill for this shift is coming into focus. The World Economic Forum estimates a full split between Western and Chinese-aligned trading blocs could remove up to $6.9 trillion from global GDP over time. Even short of a full break, ongoing fragmentation is already shaving an estimated $213–307 billion off world output and adding roughly 0.2–0.3 percentage points to global inflation, as companies pay more to reroute supply chains through ‘friendlier’ countries.

Businesses are responding by diversifying: shifting factories to Vietnam, India, and Mexico (‘friend-shoring’), stockpiling critical inputs, and duplicating supply chains rather than relying on single sources. This insurance against geopolitical risk is expensive, and someone has to pay for it — largely consumers, through higher prices, and shareholders, through lower margins. The question for 2026 is no longer whether decoupling is happening, but how fast, and who absorbs the cost.