NextFin News - The European Central Bank is poised to raise interest rates by a quarter point on Thursday in what may be its shortest tightening campaign since 2011, with ING's global head of macro Carsten Brzeski arguing that a single move "could be enough" because the bloc is fighting a textbook supply-side shock rather than an overheating economy.
The central bank is expected to lift its deposit facility rate to 2.50% from 2.25% at its September 10 meeting, a move that market-implied probabilities put at roughly 98% odds and one that would mark only the second increase since September 2023. The case for stopping there rests on a stark contradiction: eurozone inflation has jumped back above 3% for the first time in nearly three years, yet the underlying price pressure that excludes energy and food has continued to cool.
The setup is unusual for a central bank about to tighten. European shares closed mixed on Monday with the pan-European Stoxx 600 benchmark just below the flatline, Brent crude was trading near $97.70 a barrel, and Germany's 10-year bund yield sat around 3.35% — a level that has done much of the ECB's tightening work already. Markets have priced the hike, priced the pause, and now the debate is over whether the bank can pull off a one-and-done campaign without damaging its credibility.
The Setup: A Hike Priced In, a Debate Still Open
The mechanics of Thursday's decision are no longer in doubt. All 65 economists surveyed between August 31 and September 3 expect a 25-basis-point increase, and the share forecasting a move has climbed steadily from 72% before the July meeting to 83% in mid-August. Market pricing is even more certain: rate-implied probabilities assign roughly a 98% chance of a hike to 2.50% at the September 10 meeting, which begins at 12:15 p.m. local time in Frankfurt.
The real question is what comes after. The ECB last raised rates in June, lifting the deposit facility rate to 2.25% — its first increase in nearly three years — after the conflict in the Middle East sent energy prices and eurozone inflation climbing. At the July meeting, policymakers held the main refinancing rate at 2.40%, but President Christine Lagarde disclosed that some governing council members had argued for a hike, an unusual signal that the bank was leaning toward tightening even as it stayed put.
Now the data has given the hawks their cover. The European Union's statistics office expects annual inflation at 3.3% in August, up from 2.9% in July and the highest reading since September 2023. Energy led the surge at 14.3% year over year, up from 10.3% the prior month, with monthly energy prices alone rising 2.9%. But dig one layer deeper and the picture changes: core inflation, which strips out energy, food, alcohol and tobacco, actually eased to 2.4% from 2.5%, and services inflation — the component the ECB watches most closely for persistence — slowed to 3.0% from 3.3%.
That divergence is the entire story. The ECB is being asked to raise rates against a price spike it did not create, driven by a war it cannot end, in an economy that economist forecasts put at roughly 0.8% growth for 2026.
Why One Hike Fits the ECB's Own Logic
Brzeski's argument is not that inflation is harmless. It is that the appropriate policy response to a supply shock is qualitatively different from the response to demand-driven overheating, and that the ECB's own framework points to a single move.
"Whether the ECB will really go beyond a September rate hike is a completely different story. With one additional rate hike, the deposit rate would still be within the range the ECB itself calls neutral," Brzeski wrote in an ING research note. "Going further would mean that the ECB sees restrictive monetary policy as necessary. But there is a big difference between an economy that has shown resilience and an overheating economy that needs restrictive monetary policy."
The neutral-rate framing is the crux. The ECB has not published a single number for the neutral rate, but officials have repeatedly described the current stance as moving toward neutral. If one more 25-basis-point increase leaves policy roughly neither stimulating nor restraining the economy, then a second hike would by definition cross into restrictive territory — the kind of stance central banks adopt to crush demand, not to offset a temporary energy spike.
The bank has already telegraphed this thinking in its own forecasts. In its June projections, the ECB expected headline inflation to average 3.0% in 2026 before falling to 2.3% in 2027 and 2.0% in 2028, with inflation excluding energy and food averaging 2.5% over 2026 and 2027. The median economist forecast now expects inflation to average 2.9% this year — revised upward six times in 2026, the most aggressive reforecasting in a year — with the current quarter and next revised to 3.2% and 3.3%. Even so, price growth is not expected to return to the 2% target until late 2027.
In other words, even the hawks' own forecast says the problem resolves itself without a sustained campaign. The September hike is best understood as insurance: a credibility move designed to anchor expectations and preempt second-round effects, not the opening of a prolonged tightening cycle.
"We expect the ECB to hike rates by 25 basis points. Another insurance rate hike," Brzeski said on September 7. "Or for those who don't like this term: a dovish rate hike."
That dovish-hike framing captures the tightrope. The bank must act because inflation is above target and expectations must be seen to be defended. But it does not want to act so aggressively that it tips a fragile, war-hit recovery into recession.
The Mechanism: Why Supply Shocks Do Not Respond to Rate Hikes
The transmission channel is where the "one and done" thesis stands or falls. A rate hike works by reducing demand — households borrow less, firms invest less, spending slows, and price pressure eases. That mechanism is powerful when inflation is demand-driven, when too much money is chasing too few goods and the central bank can simply remove some of the money.
It is almost useless when inflation is caused by a blocked Strait of Hormuz pushing oil toward $100 a barrel. Raising rates does not reopen shipping lanes. It does not drill new wells. It does not refill European gas storage. What a rate hike can do in this situation is narrower: prevent a temporary relative-price shock from becoming embedded in wages and long-term contracts — the so-called second-round effects that turn a cyclical spike into a structural inflation problem.
That is the narrow lane the ECB is trying to drive down: tighten just enough to keep expectations anchored, but not so much that it breaks an economy growing at under 1%. The asymmetry of the risk is clear. If the ECB over-tightens, the damage is immediate and visible in growth figures, credit spreads and bond markets. If it under-tightens, the damage is contingent on second-round effects that may never materialize — and the data so far says they have not.
Financial conditions are already doing a meaningful share of the bank's work. Ten-year borrowing costs in France and Italy have each risen roughly 65 basis points this year, and Germany's by about 50 basis points, tightening credit across the bloc without a single additional policy move. The economy, meanwhile, has shown what ING described as "almost unexpected resilience," helped in part by European firms capturing orders lost by Asian competitors hit harder by the Hormuz disruption, and by long-announced fiscal stimulus finally reaching the real economy.
The historical precedent is uncomfortable, and it is the reason the "one and done" call is a minority position. In 2011, the ECB raised rates twice — in April and July — in response to surging oil prices, pushing the main refinancing rate to 1.5%. Then, as the eurozone debt crisis deepened, the bank reversed course and cut rates before the year was out, a sequence many current policymakers now regard as a policy mistake. The lesson is that hiking into a supply shock carries asymmetric risk, and that the mistake to avoid is not necessarily the one you make first.
The Counter-Case: What Would Make a Second Hike Necessary
The strongest argument against the "one and done" view is not economic theory — it is history and institutional behavior. The ECB has never stopped at a single rate increase in a tightening cycle; moves have historically come in pairs or longer sequences. A lone hike risks looking like a fine-tuning exercise, something monetary policy is not supposed to do, and could leave the bank looking indecisive if inflation stays elevated.
Market pricing reflects that institutional bias. While the September hike is treated as a near-certainty, rate-implied probabilities still assign a meaningful chance of another move by the December 17 meeting, and traders have priced in at least one more increase next year. The most hawkish readings of the futures curve point to the deposit rate reaching 2.75% by early 2027.
The economic channel for a second hike runs through expectations, not current inflation. When diesel, gasoline and food prices stay high, consumers notice immediately — these are purchases made weekly, not quarterly. If household inflation expectations drift upward, workers demand higher wages to compensate, and firms pass those labor costs through to prices. At that point a supply shock has become a wage-price spiral that only genuine demand destruction can stop.
"High diesel, gasoline and food prices are very visible to consumers. If those pressures continue, short-term consumer inflation expectations will likely move up again. And then there is a risk of wage slippage," said Alain Durre, chief Europe economist at Natixis.
The uncertainty is genuine, and even economists who expect the bank to stop after September acknowledge it. The key question is "how intensely and with what time delay energy prices will eventually translate into core inflation," said Marco Wagner, an economist at Commerzbank. For now, the translation has not happened: core inflation is falling even as headline inflation rises, and wage growth continues to slow.
There is also the question of credibility under stress. If the ECB hikes once and inflation keeps climbing toward 3.5% or 4% on sustained energy strength — a plausible outcome if the Middle East conflict intensifies or the Hormuz disruption persists through the winter refill season — the bank could be forced into a second move simply to prove it is serious, regardless of the supply-side economics.
What to Watch: The Signals That Decide the Next Move
The September decision is effectively made. The December decision is not, and it will be determined by a short list of observable metrics rather than rhetoric:
- Core inflation: if the measure excluding energy, food, alcohol and tobacco prints at or above 0.3% month over month for two consecutive months, the transitory thesis is damaged.
- Services inflation: a re-acceleration back above roughly 3.3% would signal the shock is spreading beyond energy.
- Wage growth: compensation per employee re-accelerating above about 3% year over year would confirm second-round effects are taking hold.
- Inflation expectations: medium-term expectations drifting persistently above 2.5% would force the bank's hand regardless of current data.
The base case remains one hike and then a long pause, with the deposit rate holding at 2.50% through mid-2027 as inflation gradually returns to target. About 91% of economists in the latest survey see the deposit rate ending this year at 2.50%, and 78% expect it to stay there until the middle of next year.
The upside case for rates is a prolongation or intensification of the Middle East conflict that keeps energy near current highs and pushes headline inflation above 4%. In that scenario, the September hike becomes the first of two, and possibly three, and the "insurance" label gets dropped quickly.
The downside case is a sharper growth slowdown — the economy is forecast at just 0.8% for 2026, and fiscal strain in several large member states is already tightening conditions — in which the September hike becomes the entire campaign and the conversation turns back to cuts sooner than anyone currently expects. That is the 2011 script in reverse: hike into a supply shock, then discover the economy was more fragile than the inflation print suggested.
The ECB is hiking into a shock it did not cause, at a pace the market has already accepted, with the explicit goal of doing as little as possible. One rate increase may be enough — and if it is, the bank will have pulled off the rare trick of tightening without actually tightening anything at all, letting bond markets and credibility do the work that policy rates no longer need to.
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