US Stock Market: Higher long-term Treasury yields face structural headwinds

Higher long-term U.S. Treasury yields are likely to remain elevated as inflation concerns combine with mounting government and corporate bond issuance, creating challenges for policymakers seeking to lower borrowing costs.

The recent rise in longer-dated yields reflects both immediate concerns over the U.S. inflation outlook and deeper questions about whether the bond market can absorb a growing supply of debt. At the same time, the composition of Treasury buyers has shifted toward investors who are more sensitive to prices and therefore more likely to demand higher yields.

U.S. Treasury Secretary Scott Bessent has been seeking ways to bring down long-term borrowing costs, but investors say structural changes in the bond market could limit the government's ability to influence yields.


Read more: US 10-year Treasury yield tops 19-month high as oil prices fuel rate-hike bets

Fiscal concerns put pressure on Treasuries

A key issue is the U.S. government's deteriorating fiscal position. Federal government debt has surpassed $40 trillion, increasing concerns about the long-term supply of Treasury securities.

Investors have increasingly demanded a higher term premium, the additional compensation required to hold longer-term bonds, as concerns over inflation, government borrowing and the future supply of debt have intensified.

The term premium has become an important driver of long-term Treasury yields. Even without expectations of a U.S. default, investors can demand greater compensation for holding debt over several decades when fiscal and inflation risks become more uncertain.

Changing investor base adds to volatility

The Treasury market has also undergone a significant change in its investor base. Reuters reported that hedge funds and other price-sensitive investors have increasingly taken the place of official and longer-term buyers, including overseas central banks.

That shift has made Treasury prices more sensitive to changes in supply and demand. As a result, periods of heavy bond issuance can produce sharper moves in yields when investors require additional compensation to absorb the available supply.

Ryan Swift, a U.S. bond strategist at BCA Research, told Reuters that this transformation has developed over decades rather than being a phenomenon of only the past few months.

Corporate debt creates another source of competition

Treasuries are also competing with a growing volume of corporate debt for long-term investor capital.

Companies involved in the artificial intelligence infrastructure boom are expected to significantly increase spending this year. Wall Street estimates that major technology companies could spend more than $730 billion on AI infrastructure in 2026, compared with about $400 billion last year, with a portion of that investment expected to be financed through debt.

Strong earnings, substantial free cash flow and relatively solid balance sheets have made some large corporate borrowers attractive to investors compared with government debt.

The resulting competition has helped push the yield spread between high-quality corporate bonds and Treasuries toward historically narrow levels, according to Thierry Wizman, global FX and rates strategist at Macquarie.

Corporate bonds carry default risk, unlike U.S. government securities, but investors appear increasingly comfortable with the credit quality of the large companies currently accessing long-term debt markets.

Inflation remains a major risk

Inflation is another factor preventing long-term yields from falling significantly. The outlook has become more uncertain amid higher energy prices and geopolitical tensions, with the unresolved conflict involving Iran adding to concerns about the inflationary impact of oil prices.

Investors view the inflation outlook as an important additional obstacle for policymakers. Persistent inflation above the Federal Reserve's target could limit the scope for monetary easing and keep longer-term borrowing costs elevated.

Corporate profitability has meanwhile remained strong. FactSet data showed that profits of companies in the S&P 500 rose sharply in the second quarter, while corporate profits as a share of U.S. GDP reached a record level, according to the Bureau of Economic Analysis.

Limited policy control over long-term rates

The combination of rising debt issuance, changing Treasury demand, strong corporate borrowing and inflation uncertainty creates a difficult environment for the U.S. Treasury.

While policymakers can influence the structure and timing of government borrowing, they have limited control over broader market demand or the amount of private-sector debt being issued.

Reuters reported that investors therefore expect longer-term Treasury yields to remain vulnerable to upward pressure, particularly as governments continue running large fiscal deficits and the market adjusts to a changing pool of buyers.

For Bessent and the Treasury Department, the challenge extends beyond short-term market management. Bringing down long-term borrowing costs sustainably may ultimately depend on improvements in the U.S. fiscal outlook and greater confidence that inflation will return towards the Federal Reserve's target.

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