 Moodys Investors Service Moodys placed the ratings of Noble Energy, Inc. Noble on review for upgrade, including its Baa3 long-term rating and P-3 commercial paper rating. The review of Nobles ratings follows the announcement1 that Noble and Chevron Corporation Chevron have reached an agreement in which Chevron will acquire Noble in an all stock deal. Chevron will issue 0.1191 shares for each share of Noble, valuing the Noble equity at 5 billion and the enterprise including debt at 13 billion. 