US government doubles Treasury buyback program to stabilize bond market

The US Treasury is throwing nearly $1 trillion in firepower at a bond market that’s been running a fever. Treasury Secretary Scott Bessent announced a doubling of the government’s buyback program for longer-dated securities, a move designed to cool yields that had climbed to levels not seen since 2007.

The expanded program will increase the maximum size of buyback operations from $2 billion to at least $4 billion per operation, covering both the 10- to 20-year and 20- to 30-year sectors. The changes take effect September 9 and run through November 4, 2026, adding an estimated $14 billion in additional buybacks to the roughly $69 billion in Treasury purchases already planned across all maturities this quarter.

What triggered the expansion

The 30-year Treasury yield had surged to a 19-year high before Bessent’s announcement, driven by a cocktail of factors that made long-dated bonds particularly vulnerable. Thin summer trading conditions combined with a wave of corporate bond issuance, much of it tied to AI infrastructure buildouts, created unusual selling pressure at the long end of the yield curve.

When companies issue bonds, they often hedge by selling Treasuries, which pushes government bond prices down and yields up. Pile enough of that activity into a low-liquidity window and you get the kind of disorderly price action that keeps Treasury officials up at night.

Bessent described the situation as a market “fever” that needed to be tamed. The underlying issue is structural liquidity in off-the-run Treasuries, the older bonds that don’t trade as actively as newly issued ones but still represent enormous notional value sitting on balance sheets across the financial system.

These off-the-run securities have historically suffered from capacity constraints during auctions, meaning they can become illiquid precisely when investors most need to trade them. The buyback program targets exactly these bonds, offering holders a way to sell into government demand rather than scrambling for bids in a thin market.

The Treasury’s war chest

The Treasury General Account has been built up to approximately $950 billion. Bessent indicated there could be further increases in these operations depending on how market conditions evolve, suggesting the $4 billion per operation figure is a floor rather than a ceiling.

The initial market reaction was swift. The 30-year yield dropped by 9 basis points immediately following the announcement, but yields then retraced much of that decline.

What the Treasury is really doing

Bessent was careful to frame the expansion as a liquidity enhancement rather than a direct attempt to suppress yields. By focusing on liquidity, specifically on off-the-run securities that genuinely suffer from structural trading challenges, Bessent can argue the program is improving market functioning rather than manipulating prices.

Bessent also affirmed the continuation of the regular debt auction schedule, which signals that the buyback expansion isn’t a substitute for normal issuance patterns.

What investors should watch

For fixed-income investors, the program creates a more predictable bid in the long end of the curve, which should reduce some of the liquidity premium that had been building in 10- to 30-year securities.

The AI infrastructure connection is also worth tracking. If the corporate bond issuance boom tied to data centers and AI compute continues, it will keep creating hedging-related selling pressure in Treasuries. The buyback program addresses the symptom, but the structural demand for capital in the tech sector represents an ongoing source of supply in the government bond market.

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