Treasury Hikes Buyback Cap; Bessent Says Auctions Unchanged

Bessent said the larger buybacks aim to support liquidity in a more thinly traded part of the curve, particularly the 30-year sector, which has been competing with heavy corporate bond issuance tied to artificial intelligence buildouts. The buyback program is small relative to the roughly $28 trillion Treasury market, but investors watch it as a marginal liquidity signal.

The Treasury did not specify the funding source for the buybacks. A Reuters report noted the Treasury General Account at the Federal Reserve could be used because it would avoid issuing new short-dated debt, though it would draw down cash reserves. The TGA stood at roughly $940 billion as of last Wednesday. The account has averaged about $840 billion over the past year, the highest outside its pandemic-era buildup, and has been used to pay for tariff refunds after a Supreme Court ruling struck down part of President Donald Trump's tariff regime.

The U.S. gross national debt passed $40 trillion last week for the first time. Higher yields on long-dated Treasurys increase interest costs on that debt, adding fiscal pressure. The buyback program, if funded from the TGA rather than new issuance, would not add to supply but could tighten cash in the financial system.

For bond market participants, the key question is whether the larger buybacks meaningfully improve liquidity in the 30-year sector or whether the impact stays marginal. Bessent's commitment to keeping the auction calendar unchanged removes one uncertainty. The next real test comes in mid-September when the new buyback structure coincides with the quarterly refunding auctions.

The Treasury said it will provide more information about future buyback sizes after Nov. 4, the end of the current quarter's planned period.