CHICAGO--(BUSINESS WIRE)--Fitch Ratings has affirmed State Street Corporation's (State Street) Long-Term Issuer-Default Ratings (IDR) at 'AA-'. The Rating Outlook remains Stable. A full list of rating actions is at the end of this rating action commentary. KEY RATING DRIVERS IDRS, VRS AND SENIOR DEBT The affirmation of State Street's ratings is reflective of the company's stable operating performance, seasoning of risk management practices and procedures, and relatively conservative overall bal