Inflation across the euro area accelerated to 4.0% in October, reaching a three-year high as elevated energy costs kept consumer-price growth well above the European Central Bank’s target.

The annual rate increased from 3.8% in September and matched the median forecast in a Reuters survey of economists, according to a flash estimate released Wednesday, November 4, by Eurostat. The measure covers the 21 European Union countries using the euro.

Core inflation, which excludes volatile food and energy prices, held at 2.5%. That suggests much of the latest increase remains concentrated in energy and related costs rather than spreading evenly across the economy.

Energy had the highest annual inflation rate among the main components. Services inflation increased to 3.3% from 3.2%, while non-energy industrial goods rose 1.2% and unprocessed food prices climbed 4.6% from a year earlier.

The headline rate is twice the ECB’s 2% target. The central bank left interest rates unchanged at its latest meeting after raising them twice this year, but the new inflation reading is likely to strengthen expectations of another increase in December.

Reuters reported that financial markets were pricing between two and three additional increases to the ECB’s 2.5% deposit rate during the coming year. Market expectations can change quickly with energy prices and incoming economic data.

Higher European borrowing costs can affect U.S. investors and companies through currency markets, international financing and demand for American exports. The euro-area outlook is also sensitive to energy supplies because the region imports much of the fuel it consumes.

Eurostat’s figure is a preliminary estimate and may be revised when more complete national data become available. The ECB expects inflation to remain above 4% for much of the first half of 2027 before easing as earlier price increases fall out of annual comparisons.

The latest report does not establish that higher energy prices have produced a lasting wage-price cycle. Core inflation’s stability provides some evidence that broader second-round effects remain limited, though policymakers will continue watching services, wages and household expectations.

Sources: - Eurostat, “Euro Area Annual Inflation Up to 4.0%,” Nov. 4, 2026 - Reuters, “Euro Zone Inflation Rises to Three-Year High,” Nov. 4, 2026