Yields on three-month Treasury securities fell.

At the same weekly auction, the rate on six-month bills was unchanged, the government reported. The Treasury Department sold $7.4 billion in new three-month bills at an average discount rate of 7.15%, down from 7.24% last week. Another $7.4 billion was sold in new six-month bills at an average discount rate of 7.26%, the same as last week. The three-month rate was the lowest since a 7.14% average on Oct. 7. The new discount rates understate the actual return to investors--7.38% for three-month bills and 7.64% for six-month bills. The discount rate reflects the price discount received when government securities are purchased at less than face value.