The weekly average yield to maturity of the Bond Buyer Municipal Bond Index, which is based on 40 long-term bond prices, declined nine basis points this week, to 5.21% for the week ending Sept. 19, 2013. This is the lowest weekly average for the yield to maturity since the week ended Aug. 15, 2013 (five weeks ago), when it was 5.15%.

Bond Buyer Indexes

The 20-Bond GO Index of 20-year general obligation yields declined 27 basis points this week, to 4.66%. This is the lowest level for the index since July 18, 2013 (nine weeks ago), when it was 4.52%.

The 11-Bond GO Index of higher-grade 20-year GO yields dropped 28 basis points this week, to 4.39%, which is its lowest level since July 18, 2013 (nine weeks ago), when it was 4.29%.

The Bond Buyer’s Revenue Bond Index, which measures 30-year revenue bond yields, fell seven basis points this week, to 5.24%. This is its lowest level since Aug. 15, 2013 (five weeks ago), when it was 5.18%.

The yield on the U.S. Treasury’s 10-year note declined 16 basis points this week, to 2.75%, which is its lowest level since Aug. 29, 2013 (three weeks ago), when it was also 2.75%.

The yield on the Treasury’s 30-year bond dropped five basis points this week, to 3.80%, which is its lowest level since Aug. 29, 2013 (three weeks ago), when it was 3.70%.

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