The weekly average yield to maturity of The Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, dipped to 4.04% from 4.05% the week before.
The Bond Buyer's 20-Bond GO Index of 20-year general obligation yields decreased eight basis points to 3.89% from 3.97% the previous week. It is at its lowest level since April 19, when it was at 3.87%.
The 11-Bond GO Index of higher-grade 11-year GOs declined eight basis points to 3.37% from 3.45% the previous week. It is at its lowest level in three weeks.
The Bond Buyer's Revenue Bond Index dropped eight basis points to 4.38% from 4.46% last week. It is at its lowest level since April 19, when it was at 4.35%.
The yield on the U.S. Treasury's 10-year note headed south to 2.95% from 3.00% the previous week, while the yield on the 30-year Treasury decreased to 3.12% from 3.18%.