DALLAS–(BUSINESS WIRE)–CyrusOne Inc. (NASDAQ: CONE), a premier global data center REIT, today announced that S&P Global Ratings (“S&P”) has upgraded its issue-level credit ratings for CyrusOne to investment grade. S&P upgraded its ratings on CyrusOne’s senior unsecured credit facility and senior unsecured notes to ‘BBB-’ from ‘BB+’. “We are very pleased to have received an investment grade credit rating from S&P, reflecting the growth and diversification of our business and th