...SINGAPORE (S&P Global Ratings) Jan. 12, 2017--S&P Global Ratings today said it has assigned its '##' long-term issue rating to the benchmark-size U.S. dollar-denominated notes by Republic of Korea (##/Stable/A-1+). The notes will constitute the direct, unconditional, unsubordinated, and unsecured obligations of Korea. Our sovereign credit ratings on Korea reflect the country's favorable policy environment, sound fiscal position, and net external creditor position. Significant security risks and contingent fiscal liabilities partly offset these strengths. The stable outlook on the sovereign ratings is predicated on our expectation that long-standing geopolitical risks will not escalate materially to the point of damaging Korea's credit metrics. We expect the rating to remain unchanged over the next two years. Beyond the outlook horizon, Korea's economic performance could revert to the mean of other developed economies as Korea's wealth levels rise further, its labor force ages, and Chinese...