Euro zone bond yields saw a notable increase on Monday following U.S. President Donald Trump’s quick dismissal of Iran’s response to a U.S. peace proposal, which in turn raised oil prices and heightened expectations of inflation, prompting the European Central Bank to contemplate tighter policies.

Germany’s 2-year government bond yield, sensitive to interest rate changes, elevated nearly 6 basis points to 2.65%. Markets are now almost fully factoring in an ECB rate hike at its upcoming June meeting, with expectations that two more 25-basis point hikes will follow by September and a significant chance of a third by the year’s end.

Oil price fluctuations, particularly an increase in benchmark Brent crude futures to $103.5 a barrel, have been closely tracked, as they influence bond yields and inflation predictions. ECB members and analysts continue to stress vigilance, with concerns over persistent high energy prices potentially resulting in broader inflationary pressures.

(With inputs from agencies.)