Can someone who once helped Soros break the Bank of England now use the same tactics to defend the U.S. Treasury market?

Since the beginning of this year, U.S. Treasury Secretary Scott Bessent has made consecutive moves, using a series of unexpected market operations to stake his reputation on suppressing American borrowing costs. According to Bloomberg, he has become the "most proactive Treasury Secretary in decades in intervening in the financial markets".

Following the U.S.-Japan joint intervention in the yen, Bessent's latest move is to expand U.S. bond repurchases. The Treasury Department announced that it would "at least double" the scale of repurchases of 10 to 30-year Treasury bonds—and this repurchase plan was only announced just two weeks ago. On the day the news was released, the yield on the 10-year Treasury bond fell by roughly 6 basis points, the 30-year yield fell by nearly 9 basis points, and the U.S. dollar index also fell to a three-month low.

The market's reaction confirmed Bessent's judgment: he has publicly stated, "My job is to be the nation's top bond salesman, and the U.S. Treasury yield is the barometer of success."

From Shorting the Pound to Guardian of the Bond Market

To understand Bessent's strategy, we must go back to 1992.

That year, in his early twenties, Bessent worked at the Soros Fund and participated in building a short position on the pound. On "Black Wednesday," the pound was forced to exit the European Exchange Rate Mechanism, and Soros netted over $1 billion. According to media reports, a former advisor described Bessent at the time as someone who "could see market vulnerabilities that others couldn't."

Afterward, he returned to Soros as Chief Investment Officer, leading a $1 billion yen short in 2013, once again reaping substantial returns. In 2015, he founded Key Square Capital Management with $4.5 billion, betting successfully on Brexit and Trump's two election victories.

This "find the crack, then push with the trend" hunter logic has run through his entire hedge fund career.

And now, he is using the same intuition to do the exact opposite—defend a market under pressure.

This Year's Intervention Map: From Yen to U.S. Bonds

Bessent's moves this year have already formed a clear logical chain.

Step One, Yen Intervention. On July 31, the U.S. Treasury, in conjunction with Japanese authorities, intervened in the market to buy yen, marking the first direct yen intervention by the United States in nearly thirty years. According to data from the Peterson Institute for International Economics (PIIE), Japan used approximately $87 billion of its foreign exchange reserves to purchase yen in the last two days of July, with the U.S. Treasury "joining in the final stages, providing a relatively limited amount of funding but sending an important political signal of support." It is worth noting that the Treasury sold euros instead of dollars, and the European authorities were not informed in advance.

Behind this move lies an undercurrent: Japan holds around $1.1 trillion in U.S. Treasuries, making it the largest foreign holder. If Japan had intervened alone to finance the intervention, it might have been forced to sell U.S. Treasuries, further driving up long-term yields. Washington's participation allowed Japan to sell fewer U.S. Treasuries, indirectly preserving the yield curve that Secretary Benson cares most about.

Step Two, Bond-issuance Contraction Signal. Earlier this month, the Treasury hinted at a potential reduction in the issuance size of long-term bonds, signaling an expectation of supply tightening to the market.

Step Three, Enhanced Repurchase. It was announced this week that the size of long-dated bond repurchases would at least double, providing direct support to prices from the demand side.

Bloomberg cited Brad Golding, portfolio manager at Christofferson Robb & Co., as saying this is akin to "an old-school ‘clean screens’ maneuver" — a hedge fund technique involving simultaneous orders to multiple major dealers to trigger significant market volatility.

Mark Sobel, a former U.S. Treasury official now with the OMFIF think tank, told Bloomberg, "He is absolutely a radical, which harkens back to his hedge fund background." "Both he and this administration are clearly concerned about the rise in long-term yields."

Breaking "Rules and Predictability"

Benson's actions are in direct conflict with the Treasury's traditional principles.

The U.S. Treasury has long adhered to a principle of "rules-based, predictable" debt management, avoiding surprises for the market. Benson himself publicly endorsed this principle at a Treasury market conference in November of last year.

However, his recent actions have deviated from this commitment.

Gregory Faranello, Head of U.S. Rate Trading and Strategy at AmeriVet Securities, told Bloomberg, "This violates the 'rules-based, predictable' principle — but that’s the world we're in." "The signal is clear: Prevent the rise in yields."

Ironically, Bernett's predecessor Yellen adjusted the debt issuance structure in 2023 to suppress yields, with Bernett being one of the critics at the time, accusing the move of being politically motivated. Former chief economist for Trump, Stephen Miran, also co-authored a paper in 2024 criticizing the "Aggressive Treasury Issuance" (ATI).

According to Bloomberg, Miran and Nouriel Roubini wrote in the paper: "Once a party starts using ATI to stimulate the economy during the election season, all future administrations may follow suit."

Question: Can Intervention Solve Structural Issues?

The market had a short-term reaction to Bernett's actions, but economists have more fundamental questions.

As of the first ten months of the 2026 fiscal year, federal net interest payments have reached $963.0 billion, approximately $3.18 billion per day, a 14% year-on-year increase. The 10-year Treasury yield stands at 4.72%, while the 30-year yield is at 5.31%—a significant amount of old debt previously issued at under 2% is now rolling over at higher rates. The deficit for the 2026 fiscal year to date is $1.8 trillion, expanding by 5% from the previous year, with spending on Social Security, Medicare, national defense, and interest on debt all rising, while the Republican Party is still discussing further tax cuts.

Robin Brooks, Senior Fellow at the Brookings Institution, bluntly told Bloomberg: "This is not addressing the root issues—reducing debt, shrinking the fiscal deficit, but rather trying to manipulate the yield curve."

John Velis, BNY Macro Strategist, also stated: "Given current spending policies and wars, alleviating pressure at the long end will be very difficult."

The effectiveness of yen intervention is also questionable. After hitting a high of 163.98 against the dollar on July 23, the USD/JPY pair fell to 159.43 by August 17, but according to CNBC, intervention did not prevent the continuous weakening of the yen. Maurice Obstfeld of the PIIE directly stated that intervention had minimal effect, saying, "Foreign exchange intervention is not a free lunch, not even a free cake."

Guy Miller, Chief Strategist at Zurich Insurance, told Bloomberg: "This approach can only work for a while. When the Treasury clearly states its intention to continue intervening, it can indeed have a quite strong effect. But ultimately, if the profligate fiscal policy is not addressed, this is unsustainable."

Onepoint Bfg's Chief Investment Officer Peter Boockvar was more direct: "He is waging war on two giant markets at the same time - the U.S. bond market and the foreign exchange market. This is an extremely difficult battle."

The Bet on Reputation

Bridgewater's logic, as articulated in his own words, is quite clear. Referring to the Trump administration's stakes in technology and resource companies last month, he said: "What we want to do is create a market signal." Speaking on Fox Business, he said: "Essentially, it's telling investors, okay, where the puck is going to be, skate there quickly."

The problem is that in 1992, shorting the pound was about finding a systemic weakness and taking advantage of it. Now, he is facing structural pressures driven by fiscal deficits, inflation expectations, and Fed policy - things that cannot be fundamentally changed through repo operations or exchange rate interventions.

According to Bloomberg, Mark Sobel, who served in the Treasury Department for nearly 40 years, believes Bridgewater is the most radical Treasury Secretary since the early 21st century. However, he also characterized yen intervention as an unwise move, arguing that it avoided the fiscal consolidation that the U.S. truly needs.

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