In the week ended Dec. 10, the weekly average yield to maturity of the Bond Buyer Municipal Bond Index fell to 4.26% from 4.27% in the previous week. The BB40 Index is based on the price of 40 long-term bonds.
The Bond Buyer's 20-Bond GO Index of 20-year general obligation yields remained flat at 3.57% from the previous week. 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 yield was unchanged at 3.08% from the prior 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 dropped one basis point to 3.97% from 3.98% in the previous week, which set a new low since calculations began on Sept. 20, 1979.
The yield on the U.S. Treasury's 10-year note was down nine basis points to 2.24% from 2.33%, while the yield on the Treasury's 30-year bond was down up 10 basis points at 2.97% from 3.07% in the previous week.