Frankfurt: The Governing Council raised its three key interest rates by a quarter point on 10 September, lifting the deposit facility from 2.25 to 2.5 percent, the main refinancing rate to 2.65 percent and the marginal lending rate to 2.90 percent. It was the second increase of the year, following June, and it ended a three-year run of easing that markets had assumed would continue.

The monetary policy statement pinned the decision on energy. Conflict in the Middle East has kept oil and gas prices elevated, and the Council judged that the resulting pressure would hold headline inflation above the two percent target for an extended period rather than washing through in a quarter or two.

That judgement carries real weight because it treats a supply shock as something monetary policy should answer. Central bankers normally look through energy spikes, reasoning that raising rates cannot produce more oil and only suppresses demand elsewhere in the economy. The Council moved anyway, which signals worry about second-round effects reaching wages and services prices.

Evidence for those second-round effects remains mixed. Negotiated wage growth across the euro area has cooled from its post-pandemic peak, and services inflation has drifted down slowly rather than reaccelerating. Hawks on the Council point instead to inflation expectations in consumer surveys, which have edged up since spring.

Borrowers feel the move first and unevenly. Mortgage markets in Spain, Portugal and Finland sit predominantly on variable rates, so households there see payments reset within months. German and French borrowers, mostly on long fixed terms, notice nothing until they refinance. The same policy rate therefore produces very different household experiences across the currency union, which is a familiar transmission problem the ECB cannot solve with one instrument.

Governments face their own arithmetic. Higher policy rates lift sovereign borrowing costs at a moment when member states are negotiating defence commitments and the next multiannual financial framework. Italy, Belgium and France carry the heaviest debt ratios and the least room to absorb a sustained increase in interest expenditure.

The Council gave no guidance about what comes next, sticking to its meeting-by-meeting formulation. Analysts read the absence of a signal as deliberate. Committing to a path would remove the option of reversing quickly if energy prices fall, and the Council has been burned before by forward guidance that events overtook.

The deeper question is what the ECB believes the neutral rate now is. Two and a half percent on the deposit facility looks restrictive against pre-pandemic assumptions and roughly neutral against post-pandemic ones. The Council has not said which view it holds, and until it does, every meeting will be read as a clue rather than a decision.