The weekly average yield to maturity of The Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, slipped to 3.98% from 3.99% last week.
The Bond Buyer's 20-Bond GO Index of 20-year general obligation yields was unchanged from 3.87% the previous week. It remains at its lowest level since May 31, when it was at 3.78%.
The 11-Bond GO Index of higher-grade 11-year GOs was steady from 3.35% 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 was flat from 4.36% 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 fell to 2.85% from 2.90% in the prior week while the yield on the 30-year Treasury decreased to 2.98% from 3.04%.