Long-term government bond yields have climbed to the highest levels in nearly two decades across major developed markets, reflecting mounting fiscal pressures and persistent inflation concerns.
The yield on 30-year U.S. Treasuries rose to 5.31% this week, surpassing its previous peak and reaching a level not seen since 2007, according to market data. Similar upward moves were observed in Canada, where 30-year bond yields hit their highest since 2010. German 30-year Bund yields climbed to 3.78%, matching levels last seen in 2011, while British and Japanese long-term yields also set fresh records. French 30-year sovereign debt yields reached 4.9%, the highest since 2008.
Economists warn that the era of ultra-low interest rates and subdued inflation following the 2008 financial crisis may be drawing to a close. Kjersti Haugland, chief economist at DNB Carnegie, noted that the shift coincides with historically high public debt in several advanced economies, including the U.S., Japan, France and the U.K. Investors are increasingly demanding higher compensation for the risk of sustained inflation, which is expected to keep short-term rates elevated.
Corporate borrowing is adding to the strain. U.S. technology firms have significantly increased bond issuance to fund artificial intelligence investments, with annual new issuance rising from an average of $61 billion over the past five years to $131 billion in 2025 and $192 billion in the first seven months of 2026 alone, according to J.P. Morgan Asset Management. This surge in corporate debt is competing for investor capital with sovereign issuers, driving up yields across both segments.
Tony Rodriguez, head of fixed-income strategy at Nuveen Asset Management, said the increased competition for funding is pushing yields higher. Mark Dowding, chief investment strategist at RBC Bluebay Asset Management, cautioned that the rapid expansion of tech-sector bond sales could become problematic for broader credit markets.
Despite the rising cost of financing, government debt levels continue to climb. The U.S. Treasury market has expanded from $4.5 trillion in 2007 to over $31 trillion today, with total federal debt exceeding $40 trillion. The debt-to-GDP ratio has doubled to more than 100%, while annual interest payments have surpassed $1 trillion for the first time. Nigel Green, CEO of deVere Group, noted that with debt servicing costs now exceeding $1 trillion annually and new issuance expected to remain heavy, bond investors are increasingly dictating terms to governments, raising doubts about fiscal sustainability.
