Treasury Secretary Scott Bessent's recent actions to stabilize the bond market have not yielded the desired results, with interest rates rebounding despite his efforts. On Wednesday, Bessent surprised financial markets by announcing the Treasury would double its long-end bond buyback program to $4 billion per operation from $2 billion, aiming to reduce the supply of 10-year to 30-year bonds and thereby boost their prices and lower yields. However, by Thursday, the yield on the 10-year Treasury note, a key benchmark for mortgage rates, rose back to 4.69%, nearly its level before the announcement.

Market participants indicate that these buybacks have failed to alleviate persistent concerns among investors. Key drivers of these worries include ongoing inflation, the expanding U.S. government debt, and significant borrowing by major tech firms, particularly for AI-related initiatives. Investors are looking for more sustainable solutions, suggesting that the current buyback strategy is viewed as a short-term fix rather than a fundamental resolution to underlying fiscal issues.

Bessent acknowledged the ongoing challenges, stating on CNBC that the bond repurchase program could potentially exceed $4 billion per operation, indicating the Treasury's readiness to utilize its "big toolkit." However, this intervention also introduces complexities for the Federal Reserve. If the buybacks successfully lower bond yields, it could encourage more borrowing during a period of elevated inflation, potentially pressuring the Fed to consider further interest rate hikes to counter inflationary pressures. The global bond market also presents competition, with Japanese 30-year government bonds now paying over 4%, UK bonds at 5.81%, and German bonds at 3.76%, compared to a 5.27% yield for comparable US bonds, contributing to the upward drift in US rates.