Stocks snapped a three-day winning streak on Monday amid renewed trade tensions between the United States and China.
The benchmark Korea Composite Stock Price Index(KOSPI) fell 26-point-05 points, or zero-point-72 percent, to close at three-thousand-584-point-55 on Monday.
Semiconductor shares led losses on Monday, with Samsung Electronics and SK hynix plunging by one-point-17 and three-point-04 percent, respectively.
Meanwhile, metal stocks rose on expectations that China's export restrictions would drive up rare metal prices, with Korea Zinc soaring 19-point-48 percent and POSCO Holdings gaining three-point-61 percent.
The tech-heavy KOSDAQ gained one point, or zero-point-12 percent, to close at 860-point-49.
The South Korean won weakened against the U.S. dollar by four-point-eight won to trade at one-thousand-425-point-eight won as of 3:30 p.m.