Bundesbank president warns inflation may stay elevated even after US-Iran deal

The guns may have gone quiet, but the inflation fight is far from over. That is the message from Bundesbank President Joachim Nagel, who warned on June 15 that energy market disruptions from the Iran conflict could keep eurozone inflation stubbornly above target, even after the US and Iran reached an agreement to end hostilities.

Nagel’s warning lands at an awkward moment. It puts him visibly at odds with ECB President Christine Lagarde, who welcomed the preliminary deal with considerably more warmth, citing its potential to bring energy costs down.

Why Nagel isn’t ready to declare victory

The core of Nagel’s concern is straightforward: wars end faster than energy markets recover. Even with a US-Iran agreement in place, he cautioned that normalization in oil supply could take several months, meaning the inflationary pressure that the conflict set in motion does not simply switch off when the diplomats shake hands.

This is not Nagel’s first warning on this front. Back in March 2026, he flagged that a prolonged Iran conflict would elevate eurozone inflation and drag on economic growth. The June 15 remarks suggest he is not yet convinced the threat has passed, even with a deal on the table.

The ECB already moved once. Will it move again?

The European Central Bank raised interest rates on June 11, four days before Nagel’s remarks, in a direct response to inflation concerns tied to the Iran conflict. That move made the ECB the first major central bank to explicitly link a rate hike to the war’s inflationary fallout.

The ECB’s mandate is price stability, defined as inflation at or near its 2% target. If Nagel’s read is correct and energy market disruptions keep prices significantly above that level for months, the pressure to act again does not go away simply because the first hike is done.

What this means for investors and risk assets

For anyone holding risk assets in the eurozone, Nagel’s warning functions as a yellow flag. Persistent above-target inflation means the ECB’s tightening cycle may not be as short as some investors were hoping after the US-Iran deal was announced.

The key variable to watch is oil. If supply normalization happens faster than Nagel’s timeline suggests, the inflationary pressure he is worried about could dissipate more quickly, giving the ECB room to pause. If he is right about the lag, the June 11 hike may end up being the first in a series.

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