Iran Shock Pushes Eurozone Bond Yields to Decade Highs

Borrowing Costs Hit Multi-Year Highs on Inflation Fears

Fears of fiscal deterioration and persistent inflation, ignited by an "Iran shock" that has driven up energy prices, have caused one of the most severe monthly sell-offs in Eurozone government bonds in nearly a decade. The rout pushed Italy's 10-year government bond yield to 4.14%, a high not seen since mid-2024. The selling pressure extended across the bloc, with France's 10-year yield touching 3.9% for the first time since 2009 and Spain's yield approaching 3.7%, a level last seen in late 2023. This sharp repricing reflects investor concerns that governments will be forced into costly spending measures to protect consumers, just as rising inflation pressures the European Central Bank to consider further interest rate hikes.

Governments Confront Limited Fiscal Space for Subsidies

Eurozone nations are responding to the energy price shock with varying fiscal commitments, constrained by budgets already strained from previous crises. Spain's parliament approved a €5 billion package to cut value-added taxes on energy, while Italy enacted a temporary 20% reduction in fuel excise duties at a cost of €417 million. In contrast, France has avoided large-scale subsidies, with its government citing a high budget deficit of 5.1% of GDP and stating it has "no savings jar to draw from." This contrasts sharply with the response to the 2021-2023 energy crisis, when European governments allocated a combined €651 billion for consumer protection. The OECD has warned that new measures will "further exacerbate the budget pressures" most governments already face, signaling significantly less capacity for fiscal support this time around.

Bond Spreads Widen as Stagflation Risk Looms

The bond market turmoil has reversed the narrowing of yield spreads between Germany and more indebted member states. The premium on Italy's 10-year bonds over their German counterparts has widened from 0.6 to nearly 1.0 percentage point since the conflict began. While this spread remains below the 3.0 percentage point peak seen during the pandemic, analysts warn of escalating risk. According to Tomasz Wieladek, Chief European Macro Strategist at T Rowe Price, investors are bracing for a period of low growth and high inflation combined with increased government spending. A key risk threshold lies in the German 10-year yield, currently around 3.1%; should it rise past 3.5%, it could push borrowing costs for Italy and France toward 5%, a level where "debt sustainability will become uncertain."