The Treasury Department announced it will buy back $6 billion in longer-term debt in an effort to stabilize bond markets, which have been turbulent as the national debt recently surpassed $40 trillion.

The Treasury announced the buyback operation on Wednesday, with officials saying it will include the purchase of 10-year and 20-year Treasury bonds. Treasury yields have recently risen to levels that have raised concern among investors and budget experts, in part prompting the action by the department led by Treasury Secretary Scott Bessent.