South Korean stocks opened lower on Thursday. The benchmark Korea Composite Stock Price Index (KOSPI)fell 0. 33 points, or 0.02 percent to 1,991.48 in the first 15 minutes of trading. The local currency was trading at 1,061.80 won against one U.S. dollar as of 9:15 a.m., down 0.1 won from Wednesday\'s close.