The weekly average yield to maturity of The Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, dropped two basis points to 4.08% from 4.10% in the previous week.
The Bond Buyer's 20-Bond GO Index of 20-year general obligation yields fell two basis points to 3.40% from 3.42% in the prior week. It is at its lowest level since March 3 when it stood at 3.34%.
The 11-Bond GO Index of higher-grade 20-year GO yields decreased two basis points to 2.92% from 2.94% in the previous week. It is at its lowest level since March 3 when it was 2.86%.
The Bond Buyer's Revenue Bond Index fell five basis points to 3.81% from 3.86% last week. It is at its lowest level since March 3 when it was at 3.79%.
The yield on the U.S. Treasury's 10-year note fell two basis points to 1.91% from 1.93%, while the yield on the Treasury's 30-year bond was unchanged from 2.70% in the prior week.