CHICAGO--(BUSINESS WIRE)--Fitch Ratings has assigned a 'BBB' rating to the Chicago Transit Authority, Illinois (CTA, or the authority) $135.95 million of Series 2015 Section 5307 and $43.98 million of Series 2015 Section 5337 capital grants receipt refunding revenue bonds. In addition, Fitch has affirmed the 'BBB' rating on the outstanding $430.73 million Section 5307 and $282.27 million Section 5337 capital grants receipt revenue bonds. The Rating Outlook on all bonds is Stable. RATING RATIONA