#贝森特拟出手震慑国债空头 Nearly $1 trillion in ammunition loaded! The U.S. Treasury will restart buybacks on September 9, as Bessent prepares to confront bond-market shorts head-on

A smokeless battle to defend interest rates
U.S. Treasury Secretary Bessent sent a clear signal on Monday: On September 9, the Treasury will conduct its next bond buyback operation. This is not a spur-of-the-moment decision, but the effective date of the expanded buyback plan announced last Wednesday. What truly rattled the market, however, was another piece of news disclosed by CNBC earlier that day: The Treasury is considering deploying nearly $950 billion from the Treasury General Account to provide ammunition for the recently expanded buyback program.
The TGA, an account overlooked by most investors, has suddenly stepped into the spotlight. At its core, it is the U.S. government's primary operating account at the Federal Reserve, used for daily receipts and disbursements. A balance approaching $1 trillion means the Treasury is holding a huge card. If that card is actually played, the supply-demand dynamics of the long-term U.S. Treasury market will be rewritten.

What will happen on September 9
The core change in the buyback expansion plan announced by the Treasury on August 19 is that the size of liquidity-support buyback operations for nominal Treasury securities with maturities of 10 to 20 years and 20 to 30 years will be at least doubled, with the limit per operation raised from $2 billion to at least $4 billion. The effective date is September 9, and the program will continue through the end of the current quarterly refinancing period on November 4.
Bessent did not spell everything out, but left ample room for speculation. He said last Thursday that the size of a single buyback operation could exceed $4 billion. On Monday, he added, "Let's wait and see," with more news expected at the beginning of next quarter. His assessment is very clear: The market has not paid sufficient attention to the fundamentals of the U.S. economy, Treasury yields do not reflect the fundamentals, and liquidity in 30-year Treasuries is "especially scarce." The Treasury is "trying to restore balance to a weak market."

What does the TGA's $950 billion actually mean
A TGA balance of around $950 billion does not mean the Treasury will use nearly $1 trillion to buy back Treasuries. This is an important distinction. The TGA is operational funding for the government's daily receipts and disbursements, and the amount that can actually be deployed is constrained by spending arrangements, debt issuance plans, and cash-balance management targets. But for the market, the mere fact that the TGA has been identified as a potential funding source is enough to change expectations. If the Treasury issues more short-term Treasury bills to finance the buyback of long-term Treasuries, that would be a fiscal version of an operation twist—raising the supply of short-term debt, reducing the supply of long-term debt, and changing the maturity structure of the debt. But if the Treasury directly uses TGA cash for the buybacks, it would not need to rely entirely on new debt issuance to raise the buyback funds. The market effects of the two paths are completely different. The former is a maturity swap; the latter is a genuine injection of demand.
Bloomberg estimates that this could marginally alter the supply-demand balance for long-term Treasuries.

The buyback boost lasted only one day—this is the real problem
After the Treasury announced the buyback expansion on August 19, Treasury yields fell noticeably for a time. But the boost lasted only one day. On Thursday and Friday last week, medium- and long-term Treasury prices fell consecutively, sending yields back up. The market voted with its feet, expressing doubts about the operation. TD Securities strategist Howard Du put it bluntly: The market "is not completely buying" that Bessent can truly suppress long-end yields. This exposes a more fundamental problem: Buybacks alter the maturity structure of the debt and marginal demand for specific Treasuries, but they cannot change the overall size of the U.S. fiscal deficit, debt burden, and future financing needs. As long as the deficit continues expanding at a rate of $2 trillion a year, and as long as $10 trillion of old debt remains lined up for refinancing, buybacks are merely painkillers, not scalpels.
What the market is truly worried about is that the Treasury's use of TGA funds for buybacks essentially uses cash reserves to conceal the reality that long-term financing costs are out of control. Once the TGA funds are depleted, there will only be more debt requiring repeated refinancing to stay afloat.

Bessent's gamble: Using the toolbox to fight the broader trend
Bessent said the Treasury has an "ample toolbox" in the Treasury market. This is an asymmetric war. The tools at the Treasury's disposal—buybacks, maturity adjustments, and TGA fund management—can alter marginal supply and demand and short-term sentiment. But the structural forces facing the market—$40 trillion in outstanding debt, nearly $2 trillion in new deficits annually, and the systematic withdrawal of global buyers—determine the long-term level of interest rates. Bessent wants to use the toolbox to fight the broader trend. His odds of winning depend not on the number of tools, but on whether he can buy time until inflation falls or fiscal discipline improves. September 9 will be the first real clash. How large the buybacks will be, whether TGA funds will actually be used, and whether long-end yields will cooperate—all the answers will begin to be revealed one by one on that day.