The U.S. Treasury said Wednesday morning that it will at least double the size of buyback operations for longer-duration bonds, an unexpected announcement that boosted bond prices after a dramatic rise in yields. It shows the government is willing to do more to help the bond market.

The Treasury said it's raising its current maximum size of buyback operation for bonds maturing in 10 to 20 years and 20 to 30 years to "at least $4 billion per operation." The Treasury buyback schedule released on August 5th had stated there would be a maximum of $2 billion in buybacks for the same maturities.

Buybacks have been a way for the Treasury to take back older, non-actively-traded bonds from investors since May 2024 in a reverse-auction format. It doesn't significantly change the total amount of borrowing, because new issuance replaces securities that are bought back. However, since the Treasury concentrates its issuance on shorter-term bonds, removing supply on the long-end can lead to marginal downward pressure on long-term yields.

In July 2025, the Treasury increased the frequency of these long-duration bond buybacks and announced that more institutions will be able to sell their bonds to the Treasury.

Today's announcement increases the Treasury's involvement in the market at a time when the bond prices are under duress; the 30-year yield rose to 5.337% on Tuesday, a 19-year high. The 30-year yield fell to 5.188% on Wednesday after the announcement.

A $2 billion increase to buybacks would be marginal. For context, the Treasury is auctioning off $16 billion in 20-year bonds later today. But investors viewed the accelerated buyback as a sign the Treasury is attentive to the market stressors and a willing buyer at the long end of the curve.

"Beyond the immediate reaction, this move is less about the buyback itself, which is small in both absolute terms and relative to net issuance, than about the possibility of a broader deployment of "yield curve control," says economist and veteran bond watcher Mohamed El-Erian.

While today's announcement might be minor on its face, it shows that the Treasury is taking the yield rise seriously.