Following the European Central Bank's latest rate decision, market expectations for further policy tightening have notably strengthened. Interest rate swap markets now fully price in three additional 25-basis-point rate hikes by the middle of next year, with cumulative tightening of approximately 76 basis points projected by June. Previously, markets had only fully priced in three hikes by October of next year.

Meanwhile, according to sources familiar with the matter, ECB officials have factored further rate increases into their considerations, with the possibility of another hike as early as October. The sources indicated that a tighter monetary policy stance may be necessary to curb inflation, which remains persistently above 3%. However, market bets on three additional hikes could be overly aggressive, with December potentially being a more suitable timing given the release of updated economic projections covering the period through 2029.

Bond markets have also swiftly reflected these tightening expectations. Germany's 10-year government bond yield rose as much as 6 basis points to 3.51%, reaching its highest level since 2009.

Energy Shock Elevates Inflation Expectations, Markets Bet on Further ECB Tightening

On September 10, the ECB Governing Council announced a 25-basis-point hike across all three key rates, in line with market expectations. The decision takes effect on September 16, lifting the deposit facility rate, main refinancing operations rate, and marginal lending facility rate to 2.50%, 2.65%, and 2.90%, respectively.

In its statement, the ECB noted that ongoing geopolitical tensions continue to generate inflationary pressures, with inflation expected to remain significantly above target for an "extended period." Speaking at a press conference in Berlin, President Christine Lagarde elaborated that this "extended period" would last at least until the first half of 2027, with headline inflation projected to return near target around the end of that year.

Lagarde also highlighted that despite the adverse effects of the energy shock, the euro area economy demonstrated resilience in the second quarter, with growth broadly distributed across countries and sectors—a trend expected to continue into the third quarter. However, employment growth is slowing, and although near-term economic prospects have improved, energy prices remain a significant source of uncertainty.

The rate decision was passed unanimously. Lagarde stated that the ECB had recalibrated its three scenarios—moderate, adverse, and severe—with a focus on assessing energy price shocks, and that the 25-basis-point hike was "justified" under all three scenarios. Concurrently, the ECB revised upward its inflation forecasts for 2027 and 2028, projecting core inflation to remain elevated until early 2027 before gradually easing through 2028.

Markets are now even beginning to price in the possibility of additional ECB hikes through the end of 2027, indicating that investors are reassessing the central bank's future policy trajectory against the backdrop of energy-driven inflation expectations.