[THE INVESTOR] South Korean share prices declined on July 8 after the country and its main ally, the US, agreed to deploy a high-tech antiballistic-missile interception system in Korea. The benchmark KOSPI index closed 0.56 percent lower at 1963.01 points as exporting firms like cosmetic makers became big losers. Investor sentiment was down, analysts said, on concerns over the possibility of diplomatic tension with China and Russia following the THAAD decision. South Korea and the US agreed to d