Yields on short-term Treasury bills were mixed.

Interest rates on three-month bills in Monday’s auctions declined, while rates on six-month bills edged up slightly. The Treasury Department sold $7 billion in three-month bills at an average discount rate of 7.74%, down from 7.78% last week. Another $7 billion was sold in six-month bills at an average discount rate of 8.05%, up from 8.02% last week. The decline put three-month bills at their lowest rate since 7.62% on Jan. 17, 1983, while it was the highest rate on six-month bills since 8.19% on Dec. 28 of last year.