In the space of 48 hours this week, four of the world’s most powerful central banks delivered the same message: we’re doing nothing. The Federal Reserve held at 3.6%. The European Central Bank stayed at 2%. The Bank of England didn’t blink. And the Bank of Japan, which only recently emerged from its negative-rate era, decided this was not the moment to push further.

The official language varied. The Fed cited “elevated uncertainty.” The ECB pointed to “supply-side energy disruption.” The BoE mentioned “conflicting signals.” But the underlying reality is the same everywhere: the Iran war has broken the inflation-growth trade-off that central bankers were finally starting to win.

The Stagflation Trap

Just three months ago, inflation was trending toward targets across the developed world. The ECB had been cutting rates since June 2025. The Fed had trimmed to 3.6% and was signalling at least one more cut in 2026. Markets were pricing in a normalisation that felt, for the first time since the pandemic, genuinely achievable.

Then came the strikes on Iran on February 28th, and everything changed. With the Strait of Hormuz effectively closed to most traffic, removing roughly 20 million barrels per day from normal shipping routes, energy prices have surged beyond anything policymakers had modelled. Brent crude has touched $145. European natural gas prices have doubled. The ECB now forecasts headline inflation averaging 2.6% this year — up from just under 2% before the war began — and has slashed its growth forecast to 0.9% from 1.3%.

Powell's Denial

Fed Chair Jerome Powell went out of his way to reject the ‘s-word.’ When asked directly whether the US was heading for stagflation, he said it was “a 1970s term” and that today’s economy was fundamentally different. He’s right that the structural comparisons are imperfect. But his insistence on avoiding the label doesn’t change the fact that inflation is rising and growth is slowing simultaneously — which is, by any reasonable definition, stagflationary.

The Fed’s own revised projections tell the story. Officials could revise their forecast of one rate cut this year down to zero. Some analysts at TheStreet have gone further, suggesting the Iran war could force the Fed into rate hikes if the energy shock feeds into core inflation.

Europe's Deeper Problem

If the US faces a dilemma, Europe faces a crisis. The eurozone was already the weakest major economy before the war. Germany remains in a structural industrial downturn. France is politically paralysed. And now the ECB is trapped between an inflation forecast it has been forced to raise and a growth outlook it has been forced to slash.

ECB President Christine Lagarde struck a notably cautious tone, emphasising that the energy shock was “temporary and supply-driven” and should not elicit a monetary policy response. That’s textbook central banking — you don’t raise rates to fight an oil shock. But it also means the ECB is powerless to help as European households face surging energy bills for the second time in four years.

The Uncomfortable Truth

The honest assessment is this: central banks cannot solve what is fundamentally a geopolitical problem. No interest rate adjustment will reopen the Strait of Hormuz. No forward guidance will bring oil below $100. The tools of monetary policy were designed for demand-driven economies, not for wars that shut down 20% of the world’s oil supply overnight.

What we witnessed this week was not coordinated caution. It was coordinated helplessness. And until the shooting stops, that’s all we’re going to get.