Scott Bessent is trying to reassure a bond market that has stopped taking reassurance at face value. Bigger Treasury buybacks may ease trading strains, but they do not erase the debt arithmetic looming behind them.

The latest move came after long-dated Treasurys weakened: the Treasury said it would boost purchases of longer-term bonds, an effort aimed at steadying a market where liquidity has become a growing concern.¹ Beginning Sept. 9, the department planned to at least double the maximum size of buyback operations in the 10-to-20-year and 20-to-30-year sectors to $4 billion per operation, with room to go higher.²

Bessent’s case is that investors are missing the underlying economy. As gross US debt crossed $40 trillion—just five months after passing $39 trillion—he argued that the headline figure should not become an obsession. “There’s nothing magic about the $40 trillion number,” he said, insisting that the US can “grow our way out of that.”²

His broader message is that today’s deficit reflects temporary factors and productive investment: tariff refunds should fade, while immediate expensing for factories and equipment expands the future tax base. “Think of it as pulling back the slingshot here,” Bessent said, predicting that pent-up investment would turn into economic momentum as new facilities open.²

The market’s objection is less philosophical than mechanical. Treasury has relied heavily on short-term bills, which are cheaper than 30-year debt for now, but that leaves Washington more exposed if inflation or interest rates climb. Treasury’s own advisory committee has warned of a $1.45 trillion funding shortfall in fiscal 2027-28 at current auction sizes, while annual interest costs have topped $1 trillion.²

That skepticism surfaced quickly: an initial rally after the buyback announcement partly faded, underscoring investors’ view that liquidity tools cannot substitute for fiscal restraint. A widely shared critique put the political contrast bluntly, saying government debt had continued to rise despite Donald Trump’s promise to reduce it and was on course to surpass its World War II-era peak relative to GDP.Yann LeCun (ylecun)³

Bessent says Treasury has “a big toolkit.”² Bond investors appear to be asking for something more durable: a credible path to funding the government’s growing obligations.