OREANDA-NEWS. Fitch Ratings has affirmed Murphy Oil Corporation's (Murphy; NYSE: MUR) Long-Term Issuer Default Rating (IDR) at 'BB+' and unsecured debt ratings at 'BB+/RR4'. Fitch also expects to rate the company's new unsecured guaranteed credit facility 'BBB-/RR1' and proposed $500 million unsecured note due 2024 'BB+/RR4'. The Rating Outlook is Negative.