What's the credit worthiness of E&P companies? For the non-investment-grade upstream sec-tor,it has been slightly upbeat this year,but nonetheless that sector remains challenged,according to Moody's Investors Service,a leading New York-based credit-rating agency.In 2006,the overall downgrades the agency made in the investment-grade and non-investment-grade E&P sector were 13 versus three upstream upgrades-including one for non-investment-grade-rated Petro-hawk Energy as the result of its merger with KCS Energy.
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