The 10-year US Treasury yield climbed past 5% on Friday, marking a 24-year high and pushing the federal government's annual interest bill above $1 trillion for the first time. The milestone arrives as stronger-than-expected economic data and the prospect of further Federal Reserve rate hikes collide with a growing supply of government debt.
The benchmark yield, a key reference for global borrowing costs, has been rising steadily as investors reassess how long rates will stay elevated. US interest costs have now topped $1 trillion, a figure that reflects both the surge in new borrowing and the gradual repricing of older, cheaper debt.
Why the yield keeps climbing
TD Securities strategists Gennadiy Goldberg and Molly Brooks attribute the surge partly to a stronger economy, expected Federal Reserve rate hikes, and higher oil prices. The US economy grew at an 8.5% annualized pace in the second quarter before inflation, according to the Bureau of Economic Analysis, with consumer spending adding about 2.5 percentage points to real GDP growth. Imports subtracted roughly 1.6 points.
Ian Lyngen, head of US rates strategy at BMO Capital Markets, points to stronger actual and expected growth as a driver. He says the only lasting brake on yields is clear evidence that the economy or risk assets are giving way.
The move isn't confined to the US. Hong Kong's Hang Seng Index slid as much as 3% on Friday as the city's currency peg imported US yields, a reminder that America's borrowing costs ripple through global markets.
The slow burn of $1 trillion in interest
Despite the headline number, TD Securities says a fiscal apocalypse is not imminent. The average interest rate on US debt is just 3.4%, partly reflecting older bonds with lower rates. The weighted-average maturity of US debt sits at about 5.9 years, according to TD Securities estimates, and bonds excluding short-term bills carry an average coupon of 3.1%. That means the full impact of higher yields takes years to show up in the budget.
Still, the trajectory is concerning. TD Securities projects fiscal 2026 interest costs at about $1.1 trillion, $1.4 trillion in 2027, and $1.6 trillion in 2029 if yields hold at current levels. The Congressional Budget Office projects public debt at about 101% of GDP in fiscal 2026.
The debt loop and fading growth
Matthew Reese, head of global bond strategies at L&G Asset Management, warns that the debt loop worsens as nominal growth fades. He points to Japan, which avoided a debt crisis despite heavier debt and weak growth, as a case that defies simple arithmetic. But Japan's experience also came with decades of near-zero rates and a persistent current account surplus — conditions the US doesn't share.
The concern is that if growth slows while yields stay high, the government's interest burden will crowd out other spending or force more borrowing, creating a self-reinforcing cycle. For now, the economy's resilience is buying time.
Where the pain hits first
A BMO survey ranks housing as the likeliest first casualty of higher inflation-adjusted rates, with 42% of respondents naming it. Stocks came in second at 26%, while only 1% named the labor market. That suggests investors see the housing sector as most sensitive to the rapid rise in real borrowing costs, a view consistent with the slowdown in mortgage applications and home sales.
The labor market's resilience has been a key support for consumer spending, which in turn has kept GDP growth positive. But if housing weakness spreads to hiring, the Fed could face a tougher trade-off between fighting inflation and supporting growth.
For now, the bond market is testing whether the economy can withstand 5% yields. The next test comes with the Fed's upcoming policy meeting, where officials will decide whether to raise rates again or pause. Traders will also watch incoming inflation and jobs data for signs that the economy is finally cooling. Until then, the path of least resistance for yields may still be higher.
