Dollar faces pressure from US bond market buyback as 30-year-yield kicks back up

US long-term government bonds were sold off again today despite Treasury secretary Scott Bessent’s surprise intervention yesterday.

The yield on 30-year bonds was back up to 5.24 per cent by 3pm UK time, reversing some of the fall that followed the Treasury intervention.

Daniel Casali, Chief Investment Strategist at wealth management firm Evelyn Partners, says the market's reaction is telling:

‘Long-term Treasury yields have already resumed their upward trend, suggesting the increase in buybacks has done little to alter underlying supply-demand dynamics. If policymakers are serious about capping long-end yields, more intervention may be required.

‘Indeed, to borrow from the movie Jaws: "We're gonna need a bigger boat..." Investors may conclude that this week's buyback announcement is not the last one needed to stop yields rising higher. What is certain is that the US Treasury is getting uneasy about rising long-term government bond yields.

‘The US Treasury's surprise decision to at least double its buybacks of longer-dated Treasuries marks more than a routine market-liquidity operation. Coming immediately after a sharp sell-off that pushed 30-year Treasury yields to their highest level since 2007, the announcement suggests policymakers are increasingly uncomfortable with the pace of rising long-term borrowing costs. The Treasury will increase buybacks in the 10 to 20-year and 20 to 30-year sectors from a maximum of $2 billion to at least $4 billion per operation, beginning in September.¹

‘The comparison with the Federal Reserve's 2011-12 "Operation Twist" is difficult to ignore. Although the mechanics are different, the objective appears similar: reduce upward pressure on long-term yields without resorting to outright monetary easing. The significance lies less in the size of the intervention and more in what it reveals about the authorities' reaction function. Investors may now conclude that there is an unofficial threshold beyond which policymakers become increasingly willing to push back against higher long-end yields.

‘For equities, if Treasury interventions prove successful in the medium term, the implications are broadly positive. Lower Treasury yields reduce discount rates used to value future cash flows, supporting equity valuations and easing overall financial conditions. Growth stocks, technology companies and other long-duration assets tend to benefit the most from falling bond yields.

‘The more important medium-term implication may be for the US dollar. Normally, concerns about growing fiscal deficits and rising debt issuance would be expected to push bond yields higher to attract capital. However, if the US Treasury increasingly leans against that adjustment by absorbing duration risk from the market, part of the burden may shift to the currency instead. In effect, if yields are restrained, foreign investors receive less compensation for holding dollar assets and the adjustment may occur through a weaker dollar rather than higher bond yields.

‘Gold could be one of the principal beneficiaries. Historically, gold has performed well during periods of dollar weakness, falling real yields and concerns that policymakers are suppressing government borrowing costs. If investors increasingly perceive that rising debt levels limit how far long-term Treasury yields are allowed to rise, demand for alternative stores of value is likely to strengthen. A weaker dollar would provide an additional tailwind for the precious metal.

‘In short, while the buyback programme is modest in scale, the signal is material: the US Treasury appears increasingly reluctant to tolerate significantly higher long-end yields. That points to easier financial conditions, support for equities, downward pressure on the dollar and a constructive backdrop for gold.’

Source:

¹ Treasury Announces Increased Sizes of Nominal Long-End Liquidity Support Buybacks Beginning September 9, US Treasury, 19 August 2026