The European Central Bank has not raised rates. Not yet. But the fact that such a possibility is now openly circulating inside Frankfurt tells its own story. What only weeks ago would have sounded improbable — almost absurd — has re-entered the realm of plausible policy. According to officials familiar with the discussions, policymakers would be prepared to raise interest rates as early as their next meeting if the consequences of the war in Iran were to push inflation materially beyond target. Nothing has been decided. It may yet prove too early. Some would prefer June, when fresh forecasts will be available, and the intellectual scaffolding of the decision can be presented with the usual institutional solemnity. But the important point is elsewhere: the European Central Bank is no longer discussing only patience. It is discussing reaction. That, in itself, is a shift.

Christine Lagarde held rates at 2% this week, as expected, and assured markets that the institution was well placed to confront the dangers now emerging from the Middle East. Such phrasing is the central banker’s art form: reassuring in tone, conditional in substance, and almost always more hawkish than it first appears. Beneath the calm language lies a more uncomfortable reality. The war has not simply raised energy prices. It has reopened the inflation question at precisely the moment Europe thought it had, if not solved it, at least contained it. Markets have understood the message. Traders increased their bets on an April rate rise immediately after the report, with money-market pricing suggesting a roughly 60% probability of a quarter-point increase. That is not conviction. But it is no longer a fantasy either. More strikingly, markets are already beginning to price at least two increases this year, a remarkable reversal for a central bank that only recently appeared locked in a posture of prolonged stasis.

Why? Because oil and gas no longer behave like background variables. They have returned as strategic forces. The attacks in the Gulf are not merely disrupting the energy complex; they are threatening the supply chains that underpin European industry, transport and household consumption. Europe, with its structural dependence on imported energy and its recurring taste for moral posturing unbacked by hard power, remains uniquely vulnerable to such shocks. The ECB’s new quarterly projections, built on information available up to 11 March and therefore already incorporating the beginning of the war, now put inflation at 2.6% in 2026 — comfortably above the 2% target that Frankfurt treats with quasi-religious fidelity. That is the baseline. The darker scenario is considerably more brutal. In the severe version, inflation reaches 6.3% in the first quarter of 2027, while the economy slips briefly into recession in 2026. It is, in effect, the familiar European nightmare: prices rising as growth withers, and policymakers discovering once again that stagflation is not a concept from economic history but a recurring punishment for strategic fragility. Such a scenario assumes no monetary or fiscal response and rests on prolonged energy disruption lasting until the end of 2026, alongside further destruction of energy infrastructure. It is, in other words, not the central case. But central banks do not need a catastrophe to change course. They need only the suspicion that second-round effects are beginning to form.

And that is where the real anxiety lies. Higher energy prices, on their own, can be explained as external factors. They are regrettable, but temporary. Central bankers can speak of looking through them. But once wage dynamics, service inflation, and broader pricing behaviour begin to absorb the shock, the inflation becomes domestic in effect, even if foreign in origin. At that point, doing nothing ceases to look prudent and becomes negligent. This is why April matters, even without updated projections. It is not because the ECB is desperate to act. It is because the institution senses that waiting too long may prove more dangerous than moving too early. June may be tidier. April may be necessary. What confronts the ECB is not simply inflation, but credibility. If energy prices remain elevated, if the war drags on, if second-round effects begin to appear, then the old comfort of policy inertia vanishes. Frankfurt can no longer rely on the fiction that inflation will glide gently back to target while growth remains intact. The projections now admit what policymakers would prefer not to say too loudly: Europe may once again face a world in which fighting inflation means tightening into weakness.

And that is the tragedy of the continent’s condition. It has spent years weakening its own strategic autonomy, outsourcing its security, moralising its energy policy, and discovering only too late that dependence has a price. The ECB is not responsible for this architecture, but it is condemned to manage its consequences. There are moments when monetary policy shapes events. And there are moments when it merely reacts to the failures of geopolitics. This is one of the latter. The ECB has not raised rates. But it is now preparing the market for the possibility that it might have to. And in the vocabulary of central banking, that is how tightening begins.