NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed the long-term and short -term Issuer Default Ratings (IDR) of The Bank of New York Mellon Corporation (BK) at 'AA-' and 'F1+', respectively, with a Stable Rating Outlook. The ratings for The Bank of New York Mellon (BNYM), the main bank subsidiary have also been affirmed at 'AA' and 'F1+'. A full list of rating actions is at the end of this release. The affirmation and Stable Outlook reflect BK's low-risk business model and strong franchise