European bank stocks slide as bond yields jump

European bank shares sank as a fresh spike in global government bond yields reignited concerns about sovereign-debt risk. The STOXX Europe Banks index fell about 3.5%, with Societe Generale, Deutsche Bank, UniCredit and Intesa Sanpaolo each down more than 4%, Reuters reported. Banks often benefit from higher rates because lenders can charge more on loans. The latest move highlights the downside of a rapid rise in long-term yields: it can hurt the value of bond holdings and tighten funding conditions. European lenders hold sizable portfolios of government securities for liquidity, regulatory needs and balance-sheet management. When yields rise, existing bond prices fall. A gradual climb can lift net interest income without major disruption; a sharp bond-market selloff can produce large unrealized losses and add funding pressure. The surge in long-term yields has been pronounced in recent weeks. The U.S. 30-year Treasury yield reached around 5.7%, the highest level in roughly 24 years, while European sovereign yields also moved higher. The impact is spreading across markets, with higher Treasury yields weighing on equity valuations, particularly in technology. France has become an additional focal point. Investors are demanding increasingly different yields across eurozone issuers, and French government bonds have come under pressure on concerns about borrowing and the budget deficit. France’s 10-year yield climbed close to 4.9% on Wednesday, and the spread versus German government debt widened sharply. Wider sovereign spreads matter for banks because many European lenders hold substantial amounts of domestic government debt. That can create a feedback loop: worries about a government can push bond prices down, eroding the value of assets on domestic banks’ balance sheets. Persistently high yields can also weigh on the real economy. Higher borrowing costs may cool mortgage demand, commercial real estate activity and corporate investment, while raising the likelihood that existing borrowers struggle to service debt. A similar pattern is already visible in the U.S., where higher Treasury yields have kept mortgage rates elevated.