European banks increased their government bond portfolios by roughly 14% in the last year, a shift senior supervisors say could magnify financial vulnerabilities if sovereign debt markets come under strain. The build-up is concentrated in three countries and has prompted a series of cautions from regulators and analysts.
Kamil Liberadzki, who leads Economic and Risk Analysis at the European Banking Authority (EBA), described the move as a "big change" in banks' balance-sheet positioning. He linked the trend to higher government borrowing at elevated interest rates to finance defense and other spending priorities, which has made sovereign securities relatively attractive to lenders.
While Liberadzki noted that the current rise in bond yields still appears manageable, he warned of what could occur if macro conditions deteriorate. "A significant economic slowdown or a spike in yields could diminish the value of bank holdings and trigger a scenario similar to the 'sovereign-bank doom loop' seen during the 2010-2013 eurozone debt crisis," he said. He also emphasised several practical consequences for banks: funding becomes more expensive, the liquidity buffer held in securities faces greater volatility, and hedging costs are increasing.
Data covering the period from June 2022 to June 2025 show that lenders in France, Germany and Spain together accounted for around 60% of an almost 700 billion euro rise in government bond holdings. That aggregate level of sovereign exposure is the highest since the early months of the pandemic.
Market participants and analysts point to policy drivers as part of the explanation. Michiel Tukker, a senior rates analyst at ING, noted that the European Central Bank's quantitative-tightening programme has nudged banks to convert excess cash into liquid government securities to satisfy regulatory requirements, contributing to the accumulation.
Beyond the mechanics of portfolio replacement, the broader concern remains the sovereign-bank nexus. Michael Theurer, a member of the Bundesbank's board, warned that the close interdependence between governments and domestic banks through sovereign debt holdings could amplify stress. Some euro area countries are again drawing attention over debt levels and fiscal plans; Theurer said an erosion of market confidence in public finances could prompt banks to curtail lending and could tighten market liquidity. He added that the eurozone debt crisis showed how rapidly risk premia can climb when confidence deteriorates.
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Summary: Banks have materially increased holdings of government bonds, concentrated in France, Germany and Spain. Regulators caution this raises systemic vulnerabilities if yields spike or growth slows, with implications for bank funding, liquidity buffers and hedging costs.
Key points:
- Banks' government bond holdings rose about 14% over the past year, with nearly €700bn added between June 2022 and June 2025.
- Financial institutions in France, Germany and Spain accounted for about 60% of the increase.
- ECB quantitative tightening has contributed to the shift as banks replace excess cash with liquid sovereign securities to meet regulatory requirements.
Risks and uncertainties:
- A marked economic slowdown or a sudden increase in yields could reduce the market value of sovereign holdings and re-open a sovereign-bank feedback loop, affecting bank capital and lending.
- Higher funding and hedging costs and greater volatility in securities held as liquidity buffers could strain bank profitability and liquidity management.
- An erosion of confidence in public finances in some euro area countries could lead banks to pull back lending and reduce market liquidity, with knock-on effects for credit conditions.