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Treasury Secretary Scott Bessent has tried to address the immediate market pressure by expanding the department’s buyback program for longer-dated Treasuries. The plan is designed to improve liquidity and reduce the supply of older securities in the market, potentially supporting prices and lowering yields.

But the bond market’s response has been skeptical. The Treasury doubled planned purchases to USD 4 billion per operation, yet long-term yields rose again almost immediately. Analysts cited by AP said the intervention is small relative to the size of the Treasury market and cannot by itself resolve concerns about deficits, inflation, and the government’s borrowing requirements.

The rebound also shows why lower short-term policy rates do not automatically translate into cheaper long-term borrowing. Treasury yields reflect expectations for future interest rates, inflation, and economic growth, as well as the supply of government debt and demand from domestic and overseas investors.

The Federal Reserve is adding to that uncertainty. Minutes from its July meeting showed that many officials believed higher rates could be necessary if inflation remains elevated. The Fed kept its benchmark rate around 3.6%, but the debate has become more complicated as energy prices rise and inflation remains above the central bank’s 2% target.

A Reuters poll conducted earlier this month found that most economists expected the Fed to keep its policy rate at 3.50%-3.75% through the end of the year. That cautious outlook reflects a weakening labour market and softer consumer data, but inflation remains a constraint on any aggressive easing cycle.

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For bond investors, the result is an uncomfortable combination. The economy is strong enough to prevent rapid rate cuts, and inflation is high enough to complicate a sustained decline in yields. That leaves the market vulnerable to sharp moves whenever economic data or official comments change expectations.

The consequences extend far beyond government finance. The 10-year Treasury yield is a key benchmark for mortgages, corporate bonds and a wide range of financial assets. When it rises, companies face higher refinancing costs and consumers typically encounter more expensive loans. Businesses with large capital requirements, including technology companies building data centres for artificial intelligence, are particularly exposed.

The housing market is already feeling the pressure. Mortgage rates have remained around 6.6%, according to recent market data, limiting affordability even as the Federal Reserve’s policy rate is well below its peak from the previous tightening cycle.

Higher Treasury yields can also alter equity valuations. The return available from government bonds provides investors with an alternative to riskier assets, while higher discount rates reduce the present value of future corporate earnings. That is particularly relevant for growth and technology stocks, whose valuations depend heavily on profits expected years into the future.

There is also an international dimension. US Treasuries sit at the center of the global financial system, so higher yields can draw capital towards dollar assets while tightening financial conditions elsewhere. Governments and companies in emerging markets that borrow in dollars can face higher refinancing costs, while foreign central banks must weigh the impact of changing US yields on their currencies and bond markets.

Developments overseas are also reinforcing the recent rise in yields. Global bond markets have been under pressure as investors reassess inflation, government borrowing, and the relative attractiveness of sovereign debt. Rising yields in Japan and Europe have reduced some of the traditional advantage enjoyed by US government bonds.

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Geopolitical risks are another factor. Higher oil prices linked to the conflict involving Iran have revived concerns about inflation. A renewed inflation shock would make it harder for the Federal Reserve to lower rates and could push investors to demand still higher yields on long-term Treasuries.

Markets are now watching Fed Chair Kevin Warsh for clearer guidance on the direction of monetary policy, particularly at the Jackson Hole symposium. Any indication that the central bank is prepared to tolerate higher inflation could put further upward pressure on long-term yields.

For the Treasury, the challenge is therefore larger than managing day-to-day volatility. Buybacks can improve market liquidity and influence the composition of outstanding debt, but they cannot eliminate the underlying supply of government borrowing.

Until investors become more confident that inflation is contained and Washington can stabilise its fiscal trajectory, attempts to push borrowing costs lower may continue to provide only temporary relief. The bond market is effectively demanding a more durable answer.