Interest rates on short-term Treasury bills were mixed in Tuesday's auction with rates on six-month bills unchanged while rates on three-month bills fell to the lowest level since late 2011.
The Treasury Department auctioned $24 billion in three-month bills at a discount rate of 0.010 percent, down from 0.015 percent last week. Another $27 billion in six-month bills was auctioned at a discount rate of 0.040 percent, unchanged from last week.
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The three-month rate was the lowest since these bills averaged 0.005 percent on Dec. 19, 2011.
The discount rates reflect that the bills sell for less than face value. For a $10,000 bill, the three-month price was $9,999.75 while a six-month bill sold for $9,997.98. That would equal an annualized rate of 0.010 percent for the three-month bills and 0.041 percent for the six-month bills.
The weekly auction of three-month and six-month bills, normally held on Monday, was held on Tuesday this week because of the Columbus Day holiday.
Separately, the Federal Reserve said Tuesday that the average yield for one-year Treasury bills, a popular index for making changes in adjustable rate mortgages, edged down to 0.10 percent last week from 0.11 percent the previous week.