The ECB is widely expected to raise interest rates this week as euro-area inflation remains above 3%. Markets are increasingly focused on whether September will mark the end of tightening or the start of a longer period of higher borrowing costs.
The European Central Bank is expected to raise interest rates again this week as euro-area inflation remains above 3%, but the more important question for markets is whether September marks the end of a short tightening cycle or the beginning of a longer period of higher borrowing costs.
The immediate policy decision is becoming increasingly predictable. Markets have almost fully priced a 25-basis-point increase at the ECB’s 10 September meeting, which would potentially lift the deposit rate from 2.25% to 2.50%. The uncertainty lies where persistent energy inflation, resilient economic activity and still-elevated underlying price pressures are beginning to challenge the assumption that one final increase will be enough.
The ECB is no longer dealing with a simple inflation problem
The ECB’s difficulty is that Europe’s current inflation pressure is not being driven by one source alone. Higher energy prices have pushed headline inflation back above 3%, with euro-area inflation reaching 3.3% in August. That is well above the ECB’s 2% target and has revived concerns that the energy shock caused by the Middle East conflict may take longer to wash through the economy than policymakers had hoped.
Energy inflation is particularly awkward because central banks cannot solve it directly. Raising interest rates does not increase oil supply, reduce shipping disruption or lower the cost of imported gas. What tighter policy can do is prevent those higher costs from spreading more widely through wages, services and business pricing decisions.
For traders because it changes the character of the ECB’s problem. If inflation were being driven mainly by strong domestic demand, tighter policy would have a relatively straightforward objective. When the shock originates in energy, the ECB risks weakening growth while still needing to act against the possibility that temporary price increases become embedded in the wider economy.
One more hike may no longer be the end of the story
Until recently, the September increase was widely expected to be the final move in a short tightening cycle. hat view is now becoming less secure, as markets have already been reassessing the outlook for rate cuts. That view is now becoming less secure.
A Reuters poll of economists still points to a 25-basis-point increase this month followed by an extended pause, but some large banks have started to shift their forecasts. JPMorgan, BNP Paribas and Deutsche Bank now see a stronger possibility of another increase in December if energy prices remain elevated and inflation proves persistent.
This change in expectations is more important for markets than the September decision itself. If investors become convinced that the ECB is prepared to tighten again later this year, European borrowing costs could remain higher for longer across government bonds, mortgages and corporate debt. The effect would extend well beyond monetary policy expectations because higher yields also influence equity valuations, investment decisions and the relative attractiveness of the euro.
The ECB raised rates by 25 basis points in June before holding them unchanged in July, when it said the full inflationary effect of the Middle East energy shock had yet to play out. The Governing Council also stressed that policy would remain data-dependent and that it was not committing to a predetermined path.
Europe’s growth outlook complicates the decision
A more aggressive tightening cycle would carry obvious risks for an economy that is not growing particularly quickly. The ECB’s June projections put euro-area growth at just 0.8% for 2026, rising to 1.2% in 2027. Those forecasts were already downgraded because of the impact of the Middle East conflict on commodity prices, household incomes and business confidence.
The problem is therefore not simply that inflation is too high. Europe is experiencing a combination of weak growth and renewed price pressure, which reduces the margin for policy error.
Higher interest rates can help contain inflation expectations, but they also raise financing costs for businesses and households. If the ECB tightens too far while growth remains fragile, it risks adding unnecessary pressure to an economy already absorbing higher energy costs.
If it does too little, however, markets may begin to question whether inflation will return sustainably to target. The trade-off is why Thursday’s press conference could matter more than the rate decision itself.
Bond markets are already doing part of the ECB’s work
European financial conditions have tightened even before the ECB meets. Government bond yields rose sharply at the start of September as investors reacted to higher oil prices and stronger inflation expectations. Although yields later eased from their highs, borrowing costs remain elevated enough to exert pressure on businesses and consumers.
Central-bank policy does not operate only through the official deposit rate. When longer-term government yields rise, mortgage rates, corporate borrowing costs and investment returns tend to adjust as well. In practical terms, the market can tighten financial conditions independently of the ECB, which may give policymakers some room to avoid overreacting, particularly if bond markets continue to restrain demand. It also means traders should not look at Thursday’s 25-basis-point move in isolation. The broader question is how restrictive European financial conditions become after the decision.
What the ECB decision could mean for the euro
For currency traders, the obvious assumption is that higher interest rates should support the euro because they improve the relative return available on euro-denominated assets. In practice, the relationship is more complicated.
If the ECB raises rates because the European economy is strong enough to absorb tighter policy, the euro may benefit. If the central bank is forced to tighten because imported energy inflation is rising while growth weakens, the result can be less supportive. This will be particularly important this week. The euro’s reaction is likely to depend not only on whether rates rise, but on whether President Christine Lagarde signals that further increases remain likely. Markets will also be watching for any change in the ECB’s inflation and growth projections.
A more hawkish message could push bond yields higher and support the currency in the short term. A more cautious tone, especially if accompanied by weaker growth forecasts, could produce the opposite reaction even after a rate increase.
European equities face a different kind of rate risk
Higher borrowing costs also matter for equity investors. Growth-oriented companies are particularly sensitive to rising yields because much of their valuation depends on earnings expected further into the future. Banks can benefit from higher rates in some circumstances, but only if credit quality remains strong and the economy avoids a deeper slowdown.
Energy-intensive industries face an additional problem because they are being squeezed from both directions: higher input costs and tighter financing conditions. That makes the current environment different from a conventional tightening cycle driven by excessive demand.
Europe is effectively being asked to absorb an external energy shock whilst monetary policy becomes more restrictive at the same time. For traders, sector performance may therefore become increasingly uneven.
The real question is where rates peak
The September decision is unlikely to surprise anyone if the ECB delivers the expected 25-basis-point increase. If energy prices remain elevated but underlying inflation continues to moderate, the ECB may still decide that 2.50% is sufficiently restrictive. If higher energy costs begin feeding more visibly into services, wages and inflation expectations, the argument for another move later in the year becomes stronger.
Some banks now see 2.75% as a more plausible terminal rate, while moves above 3% would likely require clearer evidence that inflation is broadening beyond energy. That is the distinction markets will be trying to draw from Thursday’s language.
A quarter-point rate increase is already largely reflected in prices. A signal that Europe may be entering a longer period of restrictive monetary policy is not.
For traders watching the euro, European bonds and regional equities, that second message could prove considerably more important than the rate decision itself.
