CHICAGO--(BUSINESS WIRE)--Fitch Ratings has assigned an 'A+' rating to International Business Machines Corporation's (IBM) GBP300 million 2.625% seven-year senior notes issuance. Fitch's action affects approximately $49 billion of debt, including IBM's undrawn $10 billion credit facility. A full list if rating actions follows at the end of the release. KEY RATING DRIVERS The ratings and Outlook reflect Fitch's continued expectations for stabilizing operating trends, including the resumption of