Interest rates on short-term Treasury securities were...

Interest rates on short-term Treasury securities were mixed in Monday’s auction, with rates on three-month bills rising to the highest level since October, while rates on six-month bills edged down. The Treasury Department sold $6.4 billion in three-month bills at an average discount rate of 6.59%, up from 6.51% last week. Another $6.4 billion was sold in six-month bills at an average discount rate of 6.75%, down from 6.83% last week. The rate on three-month bills was the highest since an average of 6.84% last Oct. 19, when the stock market crashed. The rate of six-month bills was the lowest since they sold for 6.67% two weeks ago. In a separate report, the Federal Reserve said the average yield for one-year Treasury bills rose to 7.53% last week, from 7.4% the previous week.