US benchmark yield rises to highest level since early 2025 amid global bond selloff

The US 10-year Treasury yield surged to roughly 4.75% on August 18, marking its highest point since early January 2025. The 30-year yield told an even more dramatic story, climbing to between 5.23% and 5.33%, a level the bond market hasn’t seen since mid-2007.

What’s driving the selloff

Three forces are converging to push yields higher. First, inflation expectations have ratcheted up after oil prices soared above $91 per barrel. The catalyst: US-Iran peace negotiations collapsed, removing what had been a potential pathway toward more stable energy supply.

Second, the sheer volume of government debt hitting the market is creating its own gravitational pull on yields. Larger budget deficits mean more Treasury supply, and more supply without a proportional increase in demand means sellers have to offer juicier yields to move the paper.

Third, concerns about corporate debt levels are adding fuel to the fire. Companies that loaded up on cheap borrowing during the low-rate era are now staring down refinancing costs that look dramatically different from what they locked in years ago.

This isn’t just an American problem

The selloff is decidedly global. Japan’s 10-year government bond yield reached approximately 2.955%, its highest in three decades. That might sound modest compared to US levels, but for a country that spent years with negative interest rates, it represents a seismic shift in the bond landscape.

What higher yields mean for markets and the economy

Rising Treasury yields function as a tightening mechanism for the entire financial system, even without the Federal Reserve touching its policy rate. Mortgage rates climb. Corporate borrowing gets more expensive. The discount rate investors apply to future earnings goes up, which puts downward pressure on equity valuations, particularly for growth stocks whose value depends heavily on cash flows years into the future.

Corporate America faces a more nuanced challenge. Companies with strong balance sheets and low leverage can absorb higher rates without much trouble. But firms carrying significant debt loads, especially those in the high-yield or speculative-grade category, face a tighter squeeze. Refinancing $500M in bonds at 5.5% instead of 3.5% changes the math on everything from hiring plans to capital expenditure.

When the risk-free rate on a 10-year Treasury approaches 5%, investors start asking a reasonable question: why take equity risk for returns that barely exceed what you can get from government paper? That calculus tends to pull capital out of riskier assets and into fixed income.

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