U.S. Treasury to Double Long-Dated Buyback Cap as 30-Year Yields Hit Highest Since 2007

The U.S. Treasury is moving to ease strain in the long end of the bond market as yields push to multi-decade highs. Treasury Secretary Scott Bessent said Aug. 19 the department will expand its liquidity-support buyback program for longer-dated securities, lifting the maximum size of each operation from $2B to at least $4B starting Sept. 9. The backdrop is a sharp selloff in long maturities. The 30-year Treasury yield rose to about 5.33%, a level not seen since 2007. The 10-year yield traded roughly in a 4.66% to 4.72% range, with pressure concentrated in longer maturities. Bessent pointed to competing demands for capital as a key driver. Federal borrowing needs are rising, with total U.S. debt nearing $40 trillion, bringing heavier Treasury issuance. At the same time, technology companies are tapping the corporate bond market to fund AI infrastructure buildouts. He reiterated the Treasury's commitment to "regular and predictable" issuance and argued that long-term corporate investment can support productivity. The policy concern is that if government financing crowds out private borrowers and long-term rates climb too far, capital-intensive investment could slow. Markets initially responded by pushing longer-term yields modestly lower and edging the dollar down. Under the buyback program, the Treasury repurchases older, less liquid bonds and replaces them with newer on-the-run issues, aiming to improve market functioning and reduce the liquidity premium embedded in seasoned securities. The program does not reduce the overall level of debt outstanding. The move marks Bessent's second market-facing action this month. On Aug. 1, the Treasury coordinated with Japan on a currency stabilization effort, underscoring a more active stance even as each measure is presented as routine. For investors, larger buybacks may offer near-term support by improving liquidity in the 10- to 30-year sector. Corporate borrowers face a tougher calculus: major tech issuers funding AI buildouts price deals off Treasury yields plus a credit spread. If 30-year Treasuries remain above 5%, long-term corporate borrowing costs rise materially—the outcome Bessent has said the Treasury is trying to avoid.