...+ Under its new CEO, McDonald's is working to revitalize customer traffic and improve results to historical levels. + Improved in same-store sales in its core markets will be necessary to support the 'A' rating in light of continued substantial allocation of capital to shareholders. + While the company's credit metrics are more likely to remain below recent levels, the company's business risk profile and prospective financial strength still support the 'A' rating. + We are revising our outlook to negative, reflecting our view that there is a one-third chance the company cannot improve revenue growth, customer traffic and share within the next two years (especially in the U.S. market). Under that scenario, a one¡notch downgrade would result, as we would no longer consider the company more favorably than peers rated lower than 'A-'. NEW YORK (Standard & Poor's) April 1, 2015--Standard & Poor's Ratings Services today revised its outlook on Oak Brook, Ill.-based McDonald's Corp. to negative...