The yield on 30‑year Treasury bonds rose to 5.34% on Tuesday, marking the highest level in nearly two decades.
These yields determine the cost of borrowing for the U.S. government, corporations, and consumers, influencing everything from mortgages and auto loans to credit‑card rates.
The recent spike in yields has been fueled by climbing oil prices amid the U.S.–Iran tensions, prompting investor concerns over inflation.
A separate concern involves the sizable borrowing by technology firms to fund artificial‑intelligence initiatives, where the timing and magnitude of returns remain uncertain.
Although ordinary citizens may not feel the impact right away, mismanagement of the debt could eventually precipitate disruptions comparable to the 2008 financial crisis, warned economics professor David Jacks.
The rate at which U.S. debt is expanding is accelerating, and, as Jacks of the National University of Singapore noted, “the bills will eventually come due.”
The Treasury Department announced on Wednesday that it would expand its buyback program from $2 billion to $4 billion, with the program running from September 9 through November 4.
The move was described as an effort to provide additional liquidity support for longer‑term bonds.
Consequently, the 30‑year borrowing cost eased slightly to 5.18%.
John Canavan, lead analyst at Oxford Economics, said the increase was intended to “relieve” pressure on long‑term borrowing costs, which had been strained by rising oil prices, inflation risks, and robust sovereign and corporate issuance worldwide.
However, given the magnitude of outstanding Treasury debt, the expansion is unlikely to deliver substantive long‑term relief, he added.
Rene Albrecht, senior analyst at DZ Bank in Germany, noted that the U.S. government worries about the “pain of 5% or higher yields” over the long term, not only for public borrowing but also for the private sector.
‘It’s only three months until the midterm elections,’ Albrecht said, adding that the Treasury ‘has had to draw on available tools to curb the recent rise in yields.’
Economist Mohamed A. El‑Erian observed that, beyond the bond market response to lower long‑term rates, the move reflects a broader strategy by the Trump administration to exert control over interest rates, commonly referred to as “yield‑curve control.”
While the measure could temporarily lower long‑end yields and thereby ease mortgage and other borrowing costs, it also carries the risk of collateral damage and unintended consequences, El‑Erian warned on social media., external

