In the week ended Dec. 27, the weekly average yield to maturity of the Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, fell to 4.09% from 4.13% last week.
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The Bond Buyer's 20-Bond GO Index of 20-year general obligation yields dropped one basis point to 4.10% from 4.11% in the previous week. It is at its lowest level since Sept. 13, when it was at 4.06%.
The 11-bond GO Index of higher-grade 11-year GOs decreased to 3.59% from 3.60% in the previous week. It is at its lowest level since 14 weeks ago, when it was 3.53%.
The Bond Buyer's Revenue Bond Index fell six basis points to 4.58% from 4.59% the week before. It is at its lowest level since Dec. 6, when it was at 4.58%.
The yield on the U.S. Treasury's 10-year note was lower to 2.77% from 2.80%, while the yield on the 30-year Treasury increased to 3.06% from 3.02%.