US 10-year Treasury yield hit 4.85%, a three-year high, after Scott Bessent's expanded buyback program failed to calm markets facing $40 trillion

Treasury Secretary Bessent doubles buyback operations to at least $4 billion per session targeting long-dated bonds as 30-year yields hit 19-year

US bond yields rose Wednesday to their highest levels in almost three years after the Treasury Department said it would buy back up to $6 billion of government bonds, putting a…