South Korean stocks ended slightly lower Thursday ahead of the release of a key US inflation report due later this week and on remarks by a Fed official that more data are necessary to cut rates. The local currency gained against the US dollar. The benchmark Korea Composite Stock Price Index lost 9.29 points, or 0.34 percent, to close at 2,745.82. Trade volume was moderate at 412.5 million shares worth 11.7 trillion ...