German 10-year government bond yields surged to their highest level since October 2023, climbing above 4% as investors demand higher returns amid escalating inflation concerns. This sharp rise reflects growing fears that energy price volatility, driven by the widening conflict in Iran, will persistently pressure consumer prices across the eurozone. The bond sell-off marks a second consecutive day of losses, pushing borrowing costs sharply higher for Berlin. Rising energy prices are the primary catalyst, intensifying worries about sustained inflation that central banks, including the ECB, will struggle to contain without aggressive rate hikes.

This development signals a significant tightening of financial conditions for German borrowers and could dampen economic growth prospects in Europe's largest economy.