The weekly average yield to maturity of The Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, fell two basis points to 4.24% in the week ended Dec. 17 from 4.26% in the prior week.
The Bond Buyer's 20-Bond GO Index of 20-year general obligation yields remained flat at 3.57% for the third week in a row. It is at its lowest level since April 16, when it stood at 3.45%.
The 11-Bond GO Index of higher-grade 20-year GO yields was also steady at 3.08% for the third consecutive week. It is at its lowest level since Dec. 6, 2012, when it also stood at 3.03%.
The Bond Buyer's Revenue Bond Index was unchanged at 3.97% from the previous week, when it set a new low since calculations began on Sept. 20, 1979.
The yield on the U.S. Treasury's 10-year note was flat at 2.24% from the prior week, while the yield on the Treasury's 30-year bond was down up three basis points at 2.94% from 2.97% in the previous week.