Treasury boosts long-bond buyback program

The U.S. Treasury Department announced it will raise the maximum size of its buyback operations for longer-dated nominal coupon securities from $2 billion to at least $4 billion per operation. The larger operations will apply to securities in the 10- to 20-year and 20- to 30-year maturity sectors and are scheduled to run from Sept. 9 through Nov. 4.

Treasury described the change as an effort to provide greater liquidity support in these longer-dated sectors, where it sees consistent demand from market participants. The move targets specific parts of the curve that have shown thinner trading conditions, with particular focus on the 30-year segment.

In a CNBC interview, Treasury Secretary Scott Bessent said the buyback operations "could be more than the $4 billion per issue," while declining to specify a firm upper cap. He stated that Treasury is "going to increase the size of the buyback" and emphasized that the department "has a big toolkit" to support market functioning.

Bessent and Treasury characterized the expanded buybacks primarily as a liquidity-support tool designed to improve orderly trading in thin parts of the long end of the curve, especially the 30-year sector. The actions were also described as a signaling effort aimed at encouraging investors to focus on underlying economic fundamentals rather than short-term market headlines.

Financial markets reacted quickly to the announcement. The 30-year Treasury yield fell by roughly 10 basis points, dropping from levels above 5.3% to the low-5.1% area immediately after the buyback plans were unveiled.

However, that rally proved short-lived. By the following trading session, much of the move had reversed, with the 30-year yield trading around 5.24–5.25% and the 10-year yield near 4.704%, suggesting investors reassessed the lasting impact of the buybacks on overall yield levels.

Analysts and market participants cautioned that, despite the increase, the size of the buyback operations remains small relative to broader structural forces pushing long-term yields higher. They viewed the program more as a market-efficiency and liquidity-support measure than as a tool to fundamentally alter term premiums or long-run yield dynamics.

Critics also raised concerns about the timing and communication of the decision, particularly in relation to the quarterly refunding process. While Treasury signaled it would monitor market conditions and can adjust the program as needed, some investors questioned whether the approach would significantly change the overall balance of supply and demand in the long end of the Treasury market.