Markets see roughly 29% chance of another ECB rate hike in October

The European Central Bank just raised interest rates again, and it’s already hinting that it might not be done. After the ECB hiked its deposit facility rate by 25 basis points to 2.50% on September 10, financial markets began pricing in meaningful odds that another increase could land at the October 28-29 meeting.

The culprit, as usual, is inflation that refuses to cooperate. Rising energy prices, fueled by ongoing conflict in the Middle East, have kept price growth stubbornly above the ECB’s 2% target. Oil prices recently pushed past $100 per barrel, and the central bank’s own revised projections now see inflation averaging 3.0% in 2026, 2.5% in 2027, and 2.1% in 2028.

What the ECB actually said

The September meeting’s post-decision statement struck a notably hawkish tone. President Christine Lagarde leaned heavily on the phrase “data-dependent” during her press conference, indicating the ECB will let incoming economic numbers dictate its next move rather than committing to a fixed path.

The revised inflation forecasts tell the story more clearly. By bumping up its projections for both 2027 and 2028, the ECB signaled that it views current inflationary pressures as more persistent than previously assumed. The new rate of 2.50%, effective September 16, marks the latest step in a tightening cycle that has reshaped the eurozone’s monetary landscape.

Market pricing after the announcement showed roughly a 71% probability that rates stay unchanged at the October meeting, with a 28-29% chance of another 25 basis point hike to 2.75%.

Why energy prices are calling the shots

The Middle East conflict has injected a persistent upward force into global energy markets. With oil above $100 per barrel, the pass-through effects into consumer prices across the eurozone are hard to ignore.

Lagarde’s data-dependent framing gives the ECB maximum flexibility. If energy prices ease or economic growth deteriorates significantly before late October, the governing council can hold steady. If inflation data comes in hot, the door is open for another hike.

What this means for markets

Euro-denominated bonds are the most directly affected asset class. Higher rates push bond prices lower and yields higher, a dynamic that’s been playing out across the eurozone’s sovereign debt markets. German bunds, the benchmark for European government debt, face continued pressure if the market’s implied probability of an October hike drifts higher in the coming weeks.

Traders and investors will be watching eurozone inflation prints, energy price movements, and any shifts in geopolitical dynamics over the next several weeks. Each data release between now and October 28 will recalibrate the market’s assessment of whether 2.50% is the peak or just another step on the way up. With nearly a third of the market already betting on another hike, the bar for a hawkish surprise may be lower than it appears.

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