German yields rebound to highest since Aug. 3 as energy spike stokes fear

German government bond yields surged to their highest levels since August 3 as crude oil prices soared and Middle East shipping negotiations stalled, reigniting inflation concerns across European fixed-income markets. The two-year German yield hit 2.808%, leading a decline in intermediate duration bonds, while the 10-year Bund yield also rose to 3.198%, ending a short period of stability near multi-week lows.

This sharp increase in borrowing costs represents a rapid shift from the previously dovish sentiment that had been dominating European bond markets. Earlier in the week, investors had flocked to German sovereign debt following an unexpectedly weak U.S. employment report, which had removed expectations for any near-term Federal Reserve rate hikes and depressed yields globally.

However, this relief proved short-lived as the energy market turmoil returned to the forefront as the main driver of European rate movements. Brent crude oil prices continued their climb toward multi-week highs above $84 a barrel after diplomatic talks between Iran and Oman broke down, with U.S. President Donald Trump introducing tough new conditions that required Iran to provide direct financial compensation for any damages resulting from regional conflicts.

This ongoing diplomatic impasse threatens to keep energy input costs high across the Eurozone, even as domestic inflation remains elevated. The sell-off in German bonds reflects growing uncertainty ahead of a busy week of economic data, with traders watching closely for the U.S. Consumer Price Index report on Wednesday, alongside Germany's second-quarter GDP and revised July inflation figures from France and Spain.

As long as inflation data fails to show a clear slowdown, European bond markets are expected to remain under pressure.