Scott Bessent, the US Treasury Secretary, is wagering his credibility on curbing the upward march of long-term Treasury yields through a series of surprising market maneuvers, establishing himself as the most interventionist head of the Treasury in decades.
On Wednesday, the Treasury announced it would "at least double" its buyback of 10-year to 30-year US government bonds, just two weeks after its previous repurchase plan was unveiled.
Earlier this month, the department signaled it might reduce the size of its long-term bond issuance. On July 31st, Bessent also orchestrated the first US intervention in the yen market in three decades. This cascade of actions has made it impossible for markets to ignore the policy intentions behind them.
The 10-year Treasury yield closed about 6 basis points lower that day, with the 30-year yield falling roughly 9 basis points. The Bloomberg Dollar Spot Index also slid to a three-month low.
However, numerous market participants and economists warn that with the US fiscal 2026 deficit expanding by 5% year-over-year to $1.8 trillion, the structural factors pushing yields higher remain, and the effects of this intervention may be difficult to sustain.
The Core Motivation: Deep Unease Over Rising Long-End Yields
The central driver behind Bessent's recent actions is to contain the persistent climb in long-term Treasury yields. Prior to this, the 10-year yield had already risen above the level seen before Donald Trump returned to the White House—a benchmark Bessent himself has set as his key economic barometer.
Mark Sobel, a former US Treasury official and current member of the OMFIF research institute, noted, "He is certainly activist, which reminds you of his background as a hedge fund manager." He added, "In my view, he and this administration are clearly anxious about the rise in long-end yields."
The sustained increase in long-end yields, compounded by inflation concerns, uncertainty over Federal Reserve policy, and massive fiscal deficits, has kept US mortgage rates elevated and is putting pressure on economic growth just months ahead of the November congressional elections.
Brendan Fagan, a real-time strategist at Bloomberg Markets, commented, "Combined with the administration's willingness to intervene in other areas, Wednesday's move sends an increasingly clear signal—Washington is growing more uncomfortable with long-end yields. The market now knows this discomfort exists, and pain points are often probed repeatedly."
Tactics: Challenging the "Regular and Predictable" Doctrine
Bessent's series of actions have created friction with the Treasury's long-held "regular and predictable" debt management principle. In a keynote address at a Treasury market conference last November, Bessent himself explicitly endorsed this doctrine.
Yet in that same speech, he also stressed, "My job is to be the nation's top bond salesman. Treasury yields are a powerful indicator of the success of that effort."
Gregory Faranello, head of US rates trading and strategy, stated, "This does deviate from the 'regular and predictable' principle—but this is the reality we find ourselves in. The signal is very clear: stop yields from rising."
Additionally, on July 31st, Bessent oversaw the first US intervention in the yen in three decades, aiming to reduce pressure from Japan's selling of US Treasuries. Even earlier, he had utilized so-called "rate checks," asking banks for yen quotes, a move that surprised even former Japanese officials.
Brad Golding, portfolio manager at hedge fund Christofferson Robb & Co, compared Wednesday's buyback operation to a hedge fund's "full sweep" tactic—issuing buy orders to multiple major dealers simultaneously to drive significant market moves. "This resembles the old trick of sweeping the entire screen higher," he said.
Proactive Intervention Without a Triggering Crisis
From a historical perspective, the Treasury has played a key interventionist role during the financial crisis, the COVID-19 pandemic, and multiple emerging market crises in the 1990s.
What makes Bessent's current actions unique is that the recent bond market selloff has been orderly and gradual, not triggered by a sudden crisis.
Mark Sobel stated that Bessent is at least the most interventionist Treasury Secretary since the early 2000s.
Douglas Rediker, managing partner at political consultancy International Capital Strategies, also pointed out, "Bessent has made it clear to everyone that his style is activist, even without the kind of crisis catalyst that has typically been required in recent years."
Sustainability in Question: Structural Pressures Remain Unresolved
Despite the short-term market reaction, several analysts remain cautious about the lasting effectiveness of these interventions.
In a note, ABN Amro Bank rates strategists Larissa Fritz and Jaap Teerhuis wrote that while the Treasury's announcement provides near-term support for the bond market, the "structural drivers" pushing rates higher persist. "Given the continuously rising funding needs, the Treasury's ability to maintain large-scale buybacks is questionable."
The current fiscal picture is also concerning: the deficit for fiscal 2026 so far stands at $1.8 trillion, up 5% year-over-year, driven primarily by Social Security, Medicare, Medicaid, and debt interest costs. Defense spending is also set to increase, and Republicans are exploring further tax cuts.
Guy Miller, chief strategist at Zurich Insurance, remarked, "This approach can only work for so long. Intervention can be quite powerful when the Treasury makes a firm commitment clear, but ultimately, without addressing unrestrained fiscal policy, this is unsustainable."
Peter Boockvar, chief investment officer at Onepoint Bfg, succinctly highlighted the risk: "He is simultaneously challenging two massive markets—Treasuries and foreign exchange. This is a truly difficult battle."
Political Irony: Former Critic Becomes Practitioner
Bessent's interventionist path carries a notable irony—he previously criticized former Treasury Secretary Janet Yellen for employing similar tactics to suppress yields in 2023, accusing her of being politically motivated to create a favorable economic environment before the election.
More striking is that Stephen Miran, current chair of the President's Council of Economic Advisers and a former Federal Reserve Board member, co-authored a paper in July 2024 with economist Nouriel Roubini that characterized similar "Activist Treasury Issuance" (ATI) as a political tool. They warned that "once one party begins using ATI to stimulate the economy during election season, all future governments may follow suit."
Brad Setser, senior fellow at the Council on Foreign Relations, stated bluntly, "This administration is not one that sets stable rules and then lets the market operate on its own."
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