An average yield on a particular day of 11 selected general obligation municipal bonds with an average 'AA' rating, maturing in 20 years. It is comprised of 11 of the 20 bonds in the Bond Buyer 20. The Bond Buyer 11 is published by The Bond Buyer and used as a benchmark in tracking municipal bond yields.   

Also referred to as the "11 Bond Index".    



|||The average rating of the 11 bonds that make up the index are grade 'Aa2' (Moody's rating) or grade 'AA' (S&P 500 rating). The Bond Buyer 11 index is simply a theoretical and estimated average of bond yields.