SAN FRANCISCO--(BUSINESS WIRE)--Fitch Ratings has affirmed Aberdeen, Maryland's (the city) outstanding obligations as follows: --$6.8 million unlimited tax general obligation (ULTGO) bonds, series 2011 at 'AA'. The Rating Outlook is Stable. SECURITY The bonds constitute a general obligation of the city to which the city has irrevocably pledged its full faith and credit and unlimited taxing power. KEY RATING DRIVERS BALANCED OPERATIONS; HEALTHY RESERVES: Controlled spending combined with conserv