Standard&Poor's Ratings Services has assigned its 'A' rating to the City of Austin, Texas's airport system revenue bonds, series 2014. At the same time, Standard&Poor's affirmed the 'A' rating on the city's first-lien airport bonds. The outlook is stable. The rating reflects our assessment of the following factors: Austin-Bergstrom International Airport (AUS) has a strong origin and destination market (at 95% of enplanements) and good diversity of carriers. Southwest Airlines Co. is the largest carrier, accounting for 38% of enplanements of the total enplanements in 2014. The top three carriers also include , American Airlines Inc. (22%), and United Air Lines Inc. (16%) and together account for 77% of enplanements. There has been strong enplanement growth,
