For the first time since the Iran conflict sent energy prices spiraling, economists expect euro zone inflation to tick downward in the reading scheduled for the week of June 29, 2026.

The numbers that got us here

Euro area inflation hit 3.2% in May 2026, climbing from 3.0% in April. That’s the highest reading since September 2023, and the culprit is not subtle: energy costs surged 10.8% year-over-year in May, a direct consequence of supply constraints stemming from the Middle East conflict.

Before the Iran war escalated, inflation was actually behaving itself. The euro area was sitting at a comfortable 1.9% before the conflict blew that number up to 2.5% in March 2026. That single-month leap was the steepest since Russia’s invasion of Ukraine in 2022.

What the forecasters are saying

The ECB’s June 2026 projections forecast inflation peaking at 3.4% sometime in the third or fourth quarter of 2026. After that peak, the central bank expects a decline to 2.3% by the second quarter of 2027. That timeline assumes energy commodity prices continue to moderate in line with what futures markets are currently pricing in.

The European Commission’s Spring 2026 forecast revised euro area inflation expectations sharply upward, to 3.0% from a previous estimate of 1.9%.

The euro zone’s economy isn’t exactly firing on all cylinders. GDP contracted by 0.2% in the first quarter of 2026, creating something dangerously close to a stagflationary setup: prices rising while economic output shrinks.

Why the slowdown might actually stick

A 10.8% year-over-year surge in energy costs is doing an enormous amount of heavy lifting in that 3.2% headline number. Bring energy inflation down even modestly, and the overall figure follows.

Core inflation, which strips out volatile energy and food prices, has been more contained. That suggests the underlying economy isn’t generating runaway price pressures on its own. The problem has been largely imported through the energy channel.

What this means for investors

If the inflation peak lands around 3.4% as projected and the decline toward 2.3% materializes by mid-2027, the yield curve could steepen as shorter-term rate expectations come down relative to longer-term growth assumptions.

Traders should also watch for second-round effects. Even if energy prices stabilize, months of elevated costs may have already fed into wage negotiations and supply contracts that could keep core inflation stickier than expected.