U.S.-based oil and gas exploration and production (E&P) company Northern Oil and Gas Inc. has completed its exchange of its unsecured notes for second-lien secured notes and equity. We are raising our corporate credit rating on the company to 'B-' from 'SD'. The outlook is negative. We are raising the issue-level rating on the company's unsecured debt to 'CCC+' from 'D'. The recovery rating is '5'. The negative outlook reflects our view that the company may be challenged to refinance debt ahead of 2020 maturities. On May 29, 2018, S&P Global Ratings raised its corporate credit rating on U.S.-based oil and gas E&P company Northern Oil and Gas Inc. to 'B-' from 'SD'. The outlook is negative. At the same