For the week ended May 14, the weekly average yield to maturity of the Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, increased two basis points to 4.41% from 4.39% the previous week.
The Bond Buyer's 20-Bond GO Index of 20-year general obligation was unchanged at 3.74% from the week ended May 7. It is at its highest level since Dec. 4, when it stood at 3.83%.
The 11-Bond GO Index of higher-grade 20-year GO yields was unchanged at 3.59%. It is at its highest level in 24 weeks.
The Bond Buyer's Revenue Bond Index rose one basis point to 4.48%, from 4.47% from the week ended May 7. It is at its highest level since Dec. 4, when it stood at 4.50%.
The yield on the U.S. Treasury's 10-year note gained six basis points to 2.23% from 2.17%, while the yield on the Treasury's 30-year bond was up 15 basis points to 3.05% from 2.90% the week beforehand.