The Treasury Department has doubled its buyback cap to at least $4 billion for 10- to 30-year bonds through November 4, expanding its debt management program.

The move increases from the prior $2 billion cap and targets the longer end of the yield curve, where borrowing costs have climbed in recent months. Treasury buybacks differ from traditional open market operations; they allow the government to retire existing debt rather than issue new securities, effectively reducing the supply of bonds available to the market.

The Fed's Operation Twist, conducted between 2011 and 2012, involved selling shorter-dated Treasuries and purchasing longer-dated ones to flatten the curve and lower long-term borrowing costs without expanding the central bank's balance sheet. That operation achieved approximately 15 basis points of yield reduction across the 10-year maturity band. The Treasury's current buyback program operates on a smaller scale but employs a comparable mechanism: reducing the stock of longer-dated bonds in circulation puts upward pressure on their price and downward pressure on their yields.

Treasury buyback programs have existed intermittently since the 1960s but fell into disuse for decades. The Biden administration revived the tool in 2024 as long-term yields rose, with initial caps around $1 billion per month. The Trump administration's decision to double that ceiling comes as 10-year yields have moved into the 4 percent range.

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The buyback schedule applies only to bonds issued at least one year prior and held by the public, excluding the Federal Reserve's holdings. Treasury conducts the purchases through a competitive auction process rather than continuous market intervention. The November 4 expiration means the department will need to announce renewal terms or wind down the program before year-end.

The doubling of buyback capacity comes as the Treasury faces heightened pressure on its financing needs. Long-term borrowing costs have become a focal point for policymakers after years of historically low rates, and the mechanics of bond supply reduction offer a direct lever without requiring legislative action.

A doubling of the monthly buyback cap represents a four-fold increase in annual purchasing power under the expanded program, moving from roughly $24 billion to at least $48 billion annually if current caps persist. Treasury officials have not disclosed whether additional expansions are planned beyond November.