The Treasury’s Bond Market Intervention Faces an Uphill Battle as Yields Remain Elevated

Key Points

The White House and the Treasury Department have made clear their intent to influence bond market dynamics. In August, the Treasury announced plans to at least double its long-bond buyback program to $4 billion or more per auction through Nov. 4. In part as a response, the yield on the 10-year Treasury note climbed sharply, reaching 5% as of Sept. 18 — up from just below 4% prior to the Iran war, which was initiated by the U.S. and Israel in late February.

Treasury Secretary Scott Bessent is attempting to counteract rising yields through aggressive debt buybacks aimed at supporting bond prices. However, this approach faces significant structural limitations and is unlikely to deliver the outcomes certain investors are hoping for.

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Treasury’s bigger buybacks could total at least $30 billion by November

In simple terms, yield represents the annual return lenders require for taking on the risk of lending their capital. As yields rise, the prices of existing bonds fall — a dynamic that directly affects funds such as the iShares 20+ Year Treasury Bond ETF (NASDAQ: TLT), which has posted a negative total return of 3.2% so far this year. If lenders are demanding higher compensation for the capital they deploy, then the Treasury’s strategy of purchasing bonds to lift prices and suppress yields would — even if successful — effectively undermine those demands.

That reality was on display when, per Bloomberg, the Treasury’s $6 billion operation announced on Sept. 9 failed to stabilize the $32 trillion bond market amid surging oil prices. Prior to that, in August, CNBC reported that investment strategists were attributing the sustained long-bond selloff since June to factors including the U.S. government’s expanding budget deficit, persistent inflation above the Federal Reserve’s target, and elevated levels of corporate borrowing.

In essence, investors are demanding higher interest rates as compensation for the declining purchasing power of their returns. Additional bond buybacks do nothing to resolve that fundamental concern.

What do the buybacks mean for mortgage rates and stock prices?

Borrowers hoping for lower financing costs are likely to be disappointed.

Mortgage rates, for example, tend to closely track the 10-year Treasury yield, which appears poised to continue rising. According to Freddie Mac data, the average 30-year fixed mortgage rate stood at 6.95% on Sept. 18.

On Sept. 16, the Federal Reserve raised its benchmark federal funds rate by a quarter point — its first increase in three years. Yields eased modestly the following day, with the 10-year Treasury at 4.94%. However, buybacks cannot offset a tightening policy rate, as they target long-dated bonds while the Fed controls short-term rates.

The stock market may also face headwinds while bond yields remain elevated. Generally, higher yields enhance the relative attractiveness of bonds as an asset class. When investors can achieve solid, lower-risk returns from bonds, the incentive to accept greater risk in equities diminishes. As capital shifts out of stocks, prices tend to follow.

For now, investors should closely monitor the Treasury’s Nov. 4 refunding update.

If the Treasury expands its bond buyback program once again and the 10-year Treasury yield continues to hover near 5%, it would signal that market forces are prevailing in the tug-of-war over rates — meaning borrowing costs are likely to keep rising.

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