From ECB Holds to BOJ Caution: Iran War Forces Central Banks Worldwide Into the Same Bind

What changed is the clear fragmentation in how the oil shock from the Middle East is landing across regions, sharpening the global transmission channels that now weigh directly on the Fed. Europe, far more exposed to energy imports than the US, is already signaling policy caution with the ECB delaying planned rate reductions and lifting its 2026 inflation outlook while slashing growth forecasts. Energy-intensive economies there risk technical recession if Hormuz flows stay constrained through the summer. In Asia, Japan’s 95 percent reliance on regional crude and China’s position as a top importer are pushing up domestic costs, straining trade balances and forcing more cautious stances from the BOJ and PBOC. Emerging markets are seeing currency pressures mount as higher energy bills erode fiscal space.

Why now? The conflict’s supply-side effects have matured beyond the initial spike. Oil remains elevated with Brent forecasts revised sharply higher to around 96 dollars per barrel for the year, and full restoration of flows could take months even if tensions ease. This timing collides with softer activity signals in services and labor markets that would normally ease policy pressure, but the pass-through to core inflation is proving stickier than expected. The Fed’s internal debate reflects exactly this global backdrop: upside inflation risks from persistent energy costs that could embed into broader pricing, alongside downside employment risks from slower global demand and tighter financial conditions worldwide.

Why does it matter? The Federal Reserve’s reaction function is now operating in a more constrained, two-sided environment shaped by these international spillovers. A prolonged war keeps the inflation channel alive globally, limiting how aggressively the Fed can respond to any domestic softening. At the same time, weaker growth in Europe and Asia feeds back as lower US export demand and softer commodity prices over time, tilting employment risks lower. Transmission runs clearly: sustained Hormuz risks sustain oil at elevated levels → higher input costs in Europe and Asia → fragmented central bank responses that keep global rates from falling in unison → firmer US dollar differentials in some pairings but broader risk-off flows that pressure equities and EM currencies.
The euro faces downward pressure from ECB caution, the yen stays defensive on BOJ restraint, and gold trades the cross-currents of safe-haven demand versus higher real-yield support. Oil stays sensitive to any genuine de-escalation, while broader risk sentiment rotates toward energy exporters and away from import-heavy cyclicals.

The bottom line is that the Fed cannot view its mandate in isolation. Global divergences from the same oil shock amplify its own two-sided risks, keeping policy restrictive relative to what pure domestic data might otherwise justify. One cut remains in the 2026 projection, but timing grows more uncertain. Until energy prices clearly normalize and the international growth drag materializes without reigniting inflation, the higher-for-longer regime holds as the dominant global baseline. The April FOMC will test whether officials see these cross-border effects as transient or structural.