The weekly average yield to maturity of The Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, dipped to 3.96% from 3.97% the week before.
The Bond Buyer's 20-Bond GO Index of 20-year general obligation yields decreased one basis point to 3.85% from 3.86% the previous week. It is at its lowest level since May 31, when it was at 3.78%.
The 11-Bond GO Index of higher-grade 11-year GOs dropped one basis point to 3.33% from 3.34% the previous week. It is at its lowest level since four weeks ago, when it was 3.26%.
The Bond Buyer's Revenue Bond Index fell one basis point to 4.34% from 4.35% last week. It is at its lowest level since May 31, when it was at 4.27%.
The yield on the U.S. Treasury's 10-year note was higher to 2.86% from 2.84% from the previous week, while the yield on the 30-year Treasury was flat at 2.95%.