Rates mixed at US Treasury weekly auction
The Treasury Department auctioned $28 billion in three-month bills at a discount rate of 0.220 percent, down from 0.230 percent last week.
Separately, the Federal Reserve said Monday that the average yield for one-year Treasury bills, a popular index for making changes in adjustable rate mortgages, edged down to 0.54 percent last week from 0.55 percent the previous week.