CHICAGO--(BUSINESS WIRE)--Fitch Ratings has upgraded the Issuer Default Rating (IDR) of American Equity Investment Life Holding Company (AEL) to 'BBB-' from 'BB+' and revised the Rating Outlook to Stable from Positive. A full list of rating actions follows at the end of this release. The 'BBB+' IFS ratings of AEL's insurance operating subsidiaries American Equity Investment Life Insurance Company (AEILIC) and American Equity Investment Life Insurance Company of New York are unaffected by today'