U.S. Debt Tops $40 Trillion as Yields Rise

For investors, the immediate issue is the cost of money. The Treasury is refinancing debt at far higher rates than the ultra-low levels that made past borrowing easy, and the 10-year Treasury yield is hovering near levels not seen since 2007. That keeps pressure on everything from mortgage rates to corporate financing costs, while the U.S. is on track to spend more than $1 trillion on interest this year alone.

The backdrop is getting less forgiving. Renewed fighting in Iran has revived oil-price worries, raising the risk of stickier inflation and keeping the Federal Reserve from cutting rates as quickly as markets once hoped. That helps explain why long-dated government bonds are weaker even as investors continue to buy U.S. debt for safety.

The squeeze is not limited to the U.S. Japan, the U.K., Germany and France have also seen 10-year yields climb as high debt and persistent inflation force investors to demand more compensation. But America’s position stands out because its borrowing needs are so large and because Washington has shown little appetite for spending cuts or tax increases that would slow the pace.

Treasury Secretary Scott Bessent has argued the U.S. can grow out of the problem, but economists and fiscal hawks say growth alone is unlikely to close a gap this size. The longer Congress waits, the more the math worsens, which is why talk of an independent bipartisan deficit commission is resurfacing even after previous efforts stalled.

That leaves markets facing a familiar but increasingly urgent tradeoff: accept higher yields and tighter financial conditions now, or wait for a bigger fiscal adjustment later. For stocks, credit and the dollar, the risk is that the debt burden keeps locking in higher-for-longer rates and weaker policy flexibility right when the economy is most exposed.