The Treasury plans to auction $16 billion of 20-year bonds, with results due just after 1 p.m. Eastern. The offering will mark the first auction of longer-duration Treasury bonds since Moody’s on Friday became the third and final rating agency to strip the U.S. of its top Triple-A credit rating.

U.S. stocks turned mostly higher despite Moody's trimming the US' credit rating. Treasury yields jump as investors demand more payout to hold US debt.