Seoul shares ended lower Monday, bucking gains on Wall Street on extended tech losses. The Korean won fell against the U.S. dollar. The benchmark Korea Composite Stock Price Index (Kospi) fell 1.43 points, or 0.06 percent, to close at 2,454.48. The main index ended in the negative territory after opening sharply higher, jumping 23.63 points, or nearly 1 percent, in the first 15 minutes of trading on U.S. gains. On Friday, the Dow Jones Industrial Average rose 0.42 percent to 44,910.65 points, an