May 4 - Fitch Ratings has revised Chesapeake Energy Corporation's (Chesapeake) Rating Outlook to Negative from Stable. In addition, Fitch affirms the company's existing ratings. A complete list of ratings is provided at the end of this release. Approximately $13 billion in debt is affected by today's rating action. The revised Outlook stems from a still aggressive capital spending program for 2012 in a very weak natural gas environment. The company's 2012 spending plans remain essentially un