Seoul shares ended lower on Tuesday with the benchmark Korea Composite Stock Price Index (KOSPI) plunging 33.11 points, or 1.72 percent, to close at 1,886.85. Trading volume stood at 246.73 million shares worth 4.43 trillion won (4.1 billion U.S. dollars). The South Korean currency finished at 1,083.8 won against the greenback, up 0.7 won from Monday's close.