Moody's maintains existing "Aa2," "Aa2/VMIG 1" and "AA2/P-1" ratings on Advocate's outstanding bonds. The "Aa2" rating is based on a number of factors, including Advocate's strong balance sheet, good debt coverage and its status as the largest health system in the greater Chicago area. The rating outlook is stable, reflecting Moody's expectation that Advocate will continue to maintain sound operating performance and a leading market position. More hospital outlook and credit rating actions: S&P raises Berkshire Health Systems' rating to 'A' Fitch upgrades Holy Redeemer Health System's bonds to 'BBB' S&P assigns 'A-' rating to Nacogdoches County Hospital District's bonds