WASHINGTON (AP) — Interest rates on short-term Treasury bills were mixed in Monday’s auction, with rates on three-month bills unchanged while rates on six-month bills dropped to their lowest level since early February.

The Treasury Department auctioned $25 billion in three-month bills at a discount rate of 0.050 percent, unchanged from last week. Another $23 billion in six-month bills was auctioned at a discount rate of 0.075 percent, down from 0.080 percent last week.