The weekly average yield to maturity of The Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, slipped to 3.71% from 3.74% the week before.
The Bond Buyer's 20-bond GO Index of 20-year general obligation yields fell to 3.48% from 3.51% the previous week. It is at its lowest level since Jan. 4, 2018, when it was at 3.44%.
The 11-bond GO Index of higher-grade 11-year GOs declined to 3.02% from 3.05% the previous week. It is at its lowest level since Jan. 18, 2018, when it was also at 3.02%.
The Bond Buyer's Revenue Bond Index dropped to 3.97% from 4.00% from the week before. It is at its lowest level since Jan. 4, 2018, when it was at 3.92%.
The yield on the U.S. Treasury's 10-year note fell to 2.13% from 2.23%, while the yield on the 30-year Treasury dipped to 2.62% from 2.65%.