Traders work on the New York Stock Exchange on August 25, 2026. NYSE’s global bond crash is raising borrowing costs across the economy and forcing governments, businesses and consumers to confront the possibility that costly debt is here to stay. Global bond yields have been rising to multi-year highs, with Germany’s 10-year bond yield hitting its highest level since 2011, Japan’s above 3%, US 10-year Treasury yields hitting their highest level since November. 2023 and UK bond yields hit a post-2008 peak in recent days. The latest leg of the sell-off is a reflection of a combination of high public debt issuance, an oil price shock that has revived concerns about inflation and expectations that central banks could keep monetary policy tighter for longer. “For many years,” said Robin Brooks, senior fellow at the Brookings Institution. Natalia Lojevsky, CEO of CIFC Asset Management, also sees room for yields to continue rising, with heavy debt issuance now colliding with renewed inflation risks. Sovereign debt burdens are already high in much of the world, and refinancing maturing debt at higher rates will progressively increase interest costs and strain public finances. “The most vulnerable sovereigns are those that combine large fiscal deficits, high debt burdens and dependence on external capital. France stands out among developed markets,” said Masahiko Loo, senior fixed income strategist at State Street Investment Management, citing the country’s fiscal slippage, limited political appetite for fiscal consolidation and electoral uncertainty. Across emerging markets, countries running twin deficits remain particularly exposed because higher global yields increase both borrowing costs and financing risks, he added. “When debt, deficits and external financing needs collide, markets tend to become much less forgiving,” he added. Authorities may try to contain yields through bond buybacks or changes to the amount and maturity of debt they issue. But such measures do not resolve the underlying imbalance between high debt and investor demand. “The more yields rise, the more uncomfortable the long-term fiscal path looks for many countries,” Deutsche Bank wrote in a recent note. Japan illustrates the pressure particularly clearly. Public debt represents more than 200% of its gross domestic product, making its finances very sensitive to rising borrowing costs. National debt service is estimated to account for more than 25% of government spending by fiscal year 2026. Businesses: Delivering on their growth plans Businesses will have to pay more to refinance debt or raise funds for expansion. Companies with large debt needs, weaker balance sheets or floating rate debt are especially vulnerable. Small caps tend to have more floating-rate debt than their larger peers, meaning their interest expenses can rise relatively quickly as rates rise, according to Thomas Browne, portfolio manager at Keeley Teton Advisors. “The pressure points are those who are more leveraged and those who are used to free money,” Loo said. Similarly, he highlighted that commercial real estate, private equity-backed companies, direct loan portfolios and lower-quality software companies are among the most exposed. Many were financed under the assumption that capital would remain abundant and cheap. The rise of investment in artificial intelligence is adding another problem. Technology companies are issuing huge amounts of debt to build data centers and related infrastructure, putting them in competition with governments and other corporate borrowers for investor capital. “There’s a huge amount of debt being issued to fund different AI projects, and the issuers of that debt are pretty price-insensitive,” said Larry Holzenthaler, senior portfolio manager at Catalyst Funds. K-Shrink Higher long-term returns flow into mortgages, auto loans and other forms of household credit. The burden will not be distributed equally. “That long end of the curve is really important because it drives up the cost of capital, not only for businesses, but also for people with mortgages and the housing market,” Holzenthaler said. Low-income consumers, who spend a larger proportion of their earnings on paying down debt and buying necessities, are likely to feel the pressure first, market watchers said. Wealthier households can benefit from higher returns on savings and are generally better able to absorb larger monthly payments. “We have this K-shaped dynamic with respect to consumers. People who are going to feel that more in terms of what percentage of my paycheck is spent on a car payment, a mortgage payment, a student loan—low-income people are going to feel that a lot more compared to a wealthy person,” Holzenthaler added. The effect may emerge gradually as fixed-rate loans mature and households refinance. But if pressure on low-income consumers causes spending to weaken, the impact could spread throughout the economy. Stock Investors: Pressured by Returns Stock markets have shown resilience, supported by strong earnings and optimism about AI-driven productivity gains. But rising bond yields make safer government debt more attractive relative to stocks, while reducing the current value investors place on companies’ future earnings. “At some point, higher yields are a painful experience for stocks,” Lojevsky said. Larger coupon payments now provide a cushion against further price declines, unlike the low-yield environment earlier this decade. Deutsche Bank estimates that 10-year Treasury yields could rise to about 5.5% over the next year, before the capital loss from falling bond prices exceeds the coupon income investors receive. Over a two-year horizon, yields would have to rise to around 6.4% for total returns to turn negative. The calculation refers to nominal total returns, combining coupon income and changes in the market price of the bond. Choose CNBC as your preferred source on Google and never miss a moment from the most trusted name in business news.
