Original Author: Long Yue
Original Source: Wall Street News
A man who once helped Soros break the Bank of England is now using the same tactics to defend the US Treasury market?
This year, US Treasury Secretary Scott Bessent has made a series of surprising market moves, putting his own credibility on the line to suppress US borrowing costs. According to Bloomberg, he has become "the most active Treasury Secretary intervening in financial markets in decades."
Following the joint US-Japan intervention on the yen, Bessent's latest move is expanding Treasury buybacks. The Treasury Department announced it will "at least double" the buyback size for 10- to 30-year Treasuries—a plan unveiled just two weeks prior. On the day of the announcement, the 10-year Treasury yield fell about 6 basis points, the 30-year yield dropped nearly 9 basis points, and the dollar index hit a three-month low.
The market reaction confirmed Bessent's own assessment: He has publicly stated, "My job is to be the nation's top bond salesman, and Treasury yields are the barometer of success."
From Pound Short-Seller to Bond Market Gatekeeper
To understand Bessent's approach, one must look back to 1992.
That year, Bessent, in his twenties, was working at Soros Fund Management and helped build the short position against the British pound. On "Black Wednesday," the pound was forced out of the European Exchange Rate Mechanism, netting Soros over $1 billion. Media reports describe a former advisor's view of Bessent at the time: "He could see market vulnerabilities that others couldn't."
He later returned to Soros as Chief Investment Officer, and in 2013, led a $1 billion short on the yen, again reaping significant returns. In 2015, he founded Key Square Capital Management with $4.5 billion, successfully betting on Brexit and Trump's two election victories.
This "find the crack, give it a push" predator logic has defined his entire hedge fund career.
Now, he's applying the same instincts to do the exact opposite—defend a market under pressure.
The Intervention Blueprint This Year: From Yen to Treasuries
Bessent's moves this year form a clear chain of logic.
Step One: Yen Intervention. On July 31, the US Treasury Department, alongside Japanese authorities, intervened to buy yen—marking the first direct US intervention in the yen market in nearly thirty years. According to the Peterson Institute for International Economics (PIIE), Japan used about $87 billion in foreign reserves to purchase yen in the last two days of July, with the US Treasury "joining in the final stage, providing relatively limited funds but sending an important signal of political support." Notably, the Treasury sold euros, not dollars, for the operation and did not notify eurozone authorities in advance.
A hidden thread connects this: Japan holds about $1.1 trillion in US Treasuries, making it the largest foreign holder. If Japan had to finance the intervention alone, it might have been forced to sell Treasuries, further pushing up long-term yields. Washington's participation meant Japan sold fewer Treasuries, indirectly protecting the yield curve Bessent cares most about.
Step Two: Signaling Supply Contraction. Earlier this month, the Treasury hinted at possibly reducing issuance of long-term bonds, signaling a tightening of supply to the market.
Step Three: Ramping Up Buybacks. This week's announcement to at least double long-term bond buybacks directly props up prices from the demand side.
Bloomberg quoted Brad Golding, a portfolio manager at Christofferson Robb & Co., describing this as akin to the "old-school 'painting the screen' technique"—a hedge fund tactic of placing simultaneous orders with multiple large dealers to trigger significant market movement.
Mark Sobel, a former US Treasury official now at the OMFIF research institute, told Bloomberg: "He is absolutely an activist. It recalls his hedge fund background." "He and this administration are clearly worried about the rise in long-term yields."
Breaking 'Regular and Predictable'
Bessent's operations clash directly with the Treasury's traditional principles.
The US Treasury has long adhered to "regular and predictable" debt management principles, avoiding market surprises. Bessent himself publicly endorsed this principle at a Treasury market conference in November last year.
Now, his actions have departed from that promise.
Gregory Faranello, Head of US Rates Trading and Strategy at AmeriVet Securities, told Bloomberg: "This goes against the 'regular and predictable' mantra—but that's the world we're in." "The signal is clear: stop yields from rising."
More ironically, Bessent's predecessor Janet Yellen also tried to suppress yields in 2023 by adjusting debt issuance patterns, at which time Bessent was a critic, accusing the move of being politically motivated. Stephen Miran, a former Trump chief economist, co-authored a paper in 2024 criticizing "aggressive Treasury issuance" (ATI).
According to Bloomberg, Miran and Nouriel Roubini wrote in that paper: "Once one party starts using ATI to juice the economy in an election season, all future administrations may follow suit."
Question: Can Intervention Solve Structural Issues?
The market reacts in the short term to Bessent's maneuvers, but economists' questions are more fundamental.
In the first ten months of fiscal year 2026, federal net interest expense reached $963 billion, or about $3.18 billion per day, a 14% year-on-year increase. The 10-year Treasury yield is at 4.72%, and the 30-year at 5.31%—large amounts of old debt issued at rates below 2% are rolling over at much higher costs. The deficit for FY2026 so far is $1.8 trillion, 5% wider than the previous year, with spending on Social Security, Medicare, defense, and debt interest all rising, and Republicans discussing further tax cuts.
Robin Brooks, a senior fellow at the Brookings Institution, told Bloomberg bluntly: "This is not solving the underlying problem—reducing debt, shrinking the fiscal deficit—but trying to manipulate the yield curve."
John Velis, a macro strategist at BNY, also noted: "Given current spending policies and wars, it will be very difficult to alleviate long-end pressure."
The effectiveness of yen intervention is also in doubt. After hitting a high of 163.98 on July 23, USD/JPY had retreated to 159.43 by August 17, but CNBC reported the intervention did not stop the yen's persistent weakness. PIIE's Maurice Obstfeld stated flatly that the intervention had little effect, calling it "not a free lunch, not even a free snack."
Guy Miller, Chief Strategist at Zurich Insurance, told Bloomberg: "This approach can only work for a while. When the Treasury explicitly signals it will intervene consistently, it can have a fairly strong effect. But ultimately, without addressing profligate fiscal policy, this is unsustainable."
Peter Boockvar, Chief Investment Officer at Onepoint Bfg, was more direct: "He is fighting two giant markets—US Treasuries and foreign exchange—simultaneously. It's an incredibly tough battle."
Betting on Credibility
Bessent's logic is clearly stated in his own words. Last month, discussing the Trump administration's stakes in tech and resource companies, he said: "What we're trying to do is create market signals." He told Fox Business: "Essentially, it's telling investors, okay, where's the puck going, skate there fast."
The problem is, in 1992, shorting the pound meant finding an institutional weakness and pushing. Now, he faces structural pressure driven by fiscal deficits, inflation expectations, and Fed policy—issues not fundamentally changed by buyback operations or currency interventions.
According to Bloomberg, Mark Sobel, who served at the Treasury for nearly 40 years, believes Bessent is at least the most activist Treasury Secretary since the early 2000s, but he also characterized the yen intervention as unwise, arguing it avoids the fiscal consolidation the US truly needs.
