The benchmark Korea Composite Stock Price Index slid 15-point-26 points, or zero-point-28 percent, on Friday to close at five-thousand-507-point-01.

The tech-heavy KOSDAQ lost 19-point-91 points, or one-point-77 percent, to close at one-thousand-106-point-08.

The South Korean won weakened against the U.S. dollar by four-point-seven won, trading at one-thousand-444-point-nine won per dollar as of 3:30 p.m.