Scott Bessent is trying to reassure a bond market rattled by rising long-term yields just as the national debt has crossed $40 trillion. His wager is that a more active Treasury can steady trading without changing the government’s broader fiscal course.

The immediate trigger was a run-up in long-dated Treasury yields, with the 30-year rate reaching its highest level in nearly two decades. Treasury then said it would at least double buybacks of outstanding 10- to 30-year securities, from a maximum of $2 billion per operation to at least $4 billion, beginning Sept. 9. Bessent framed the move as a liquidity fix rather than a rescue, arguing that some maturities were thinly traded and mispriced. “We are going to make a market… in these,” he said, adding that purchases could exceed $4 billion.¹

That intervention landed days after gross federal debt breached $40 trillion, only five months after passing $39 trillion. Bessent urged markets not to fetishize the milestone: “There’s nothing magic about the $40 trillion number,” he said. “And we can grow our way out of that.” His case rests on future growth, tariff revenue, investment incentives and a promised fiscal-consolidation push—not merely on bond-market mechanics.¹

Critics see the sequence differently. Robin Brooks of Brookings called larger buybacks financial engineering that avoids the core issue: a deficit projected near $2 trillion this fiscal year. Suppressing yields while fiscal policy remains loose, he warned, risks turning a debt problem into a currency problem: “The U.S. is playing with fire with this buyback.”²

Other market analysts are less apocalyptic but no less skeptical. LPL Financial’s Lawrence Gillum says orderly auctions, anchored inflation expectations and subdued volatility argue against an immediate Treasury-market crisis. Yet he also expects deficits and heavy issuance to keep long yields climbing—making buybacks more of a symbolic Band-Aid than a durable cure.²

Bessent’s broader record has sharpened that concern. Former Treasury official Mark Sobel called him “activist,” while analysts noted that the administration’s interventions—from yen operations to debt-management signals—depart from Treasury’s usual “regular and predictable” approach. The announcement briefly pulled 10-year yields down about 6 basis points and 30-year yields 9 basis points, before some of the move reversed.³

The political backdrop is equally unforgiving: a widely shared chart cited by Steve Rattner said debt has continued rising despite President Donald Trump’s pledge to reduce it, already exceeding 100% of GDP and heading toward a wartime-era record.Yann LeCun (ylecun)⁴ Bessent may be able to ease a bruised market. The harder task is convincing investors that Washington will address what is bruising it.