The Return of Inflation Driven by an Energy Spike

The European Central Bank (ECB) published the account of its Governing Council monetary policy meeting held on March 18–19, 2026, in Frankfurt. The central theme: the outbreak of war in the Middle East sent energy prices surging, upending the euro area's inflation outlook and prompting markets to begin pricing in the need for further ECB tightening.

Brent crude oil prices surpassed USD 100 per barrel, reaching levels not seen since Russia's invasion of Ukraine in 2022. Natural gas prices also rose sharply, though they remained well below their 2022 peaks.

A Market Split Into Two Distinct Phases

ECB Executive Board member Schnabel described how financial markets since the previous February 5 meeting had split into two phases. Prior to the war's outbreak, a low-volatility, risk-on environment had prevailed. Once the Middle East conflict began, surging energy prices triggered sell-offs in both equity and bond markets, with volatility expanding sharply.

The Brent crude futures curve showed historically extreme backwardation at first, suggesting traders expected a quick reversal of the spike. Over time, however, those expectations were pared back, and the futures curve shifted visibly upward from where it had stood in the immediate aftermath of the war's start.

What Makes This Shock Different From the Past

The most notable divergence from historical patterns lies in how interest rate markets responded. In past episodes of energy price shocks, risk-free overnight index swap (OIS) rates and policy expectations typically fell, as investors judged the growth-dampening effects to outweigh the inflationary impulse. This time, markets priced in the opposite: the inflationary effects of the war were seen as dominant, requiring monetary policy tightening.

Euro area equity prices, the EUR/USD exchange rate, and market volatility all registered at the upper end of historical ranges for comparable geopolitical shocks. Near-term inflation compensation surged to a scale comparable only to the sharp move that followed Russia's invasion of Ukraine in 2022.

Inflation Expectations Tilted to the Upside — Long-Term Holds for Now

The energy supply shock placed heavy upward pressure on near-term euro area inflation expectations. Inflation fixings (excluding tobacco) for 2026 rose sharply, and inflation-linked swap forward rates climbed above 2% across all horizons.

Longer-term inflation expectations remained broadly stable, however — a signal that market participants still regard ECB monetary policy as credible. The rise in inflation compensation was driven in roughly equal parts by higher genuine inflation expectations and higher inflation risk premia, reflecting investor demand for compensation against greater inflation uncertainty in a geopolitically fragmented world.

Option market data showed that the balance of inflation risks over two- and five-year horizons has shifted sharply to the upside, especially at shorter horizons, while risks over longer horizons remained broadly balanced.

Nominal Rates Rise, But Real Rates Diverge

In euro area rate markets, shifts in inflation compensation dominated over moves in real rates. Both euro area and US nominal rates rose significantly, but the reassessment of inflation prospects was substantially more pronounced in the euro area across all maturities.

Euro area two-year real rates, however, declined — reflecting a downward revision to growth expectations. Fears that the energy price surge would weigh on near-term economic activity dragged real rates lower even as nominal rates rose.

Outlook [AI Analysis]

The Middle East energy shock is likely to place the ECB in a difficult position. Inflation expectations call for tightening, while falling real rates and growth concerns pull in the opposite direction.

With markets already pricing in a tightening path, the ECB risks undermining its inflation credibility if it fails to signal at least a hold — or more — at its next meeting. Whether long-term inflation expectations can maintain their current stability is likely to become the key variable guiding the ECB's future policy path.

Should energy prices rise further or the conflict prove prolonged, the euro area may once again face stagflation risks akin to those seen in 2022. Conversely, if the swift reversal implied by the futures market materializes, the ECB may find room to calibrate its tightening more gradually.