The benchmark Korea Composite Stock Price Index(KOSPI) tumbled 25-point-86 points, or one-point-25 percent, to close at two-thousand-37-point-87 on Friday as North Korea's nuclear test spooked investors.

The tech-heavy KOSDAQ lost two-point-41 points, or zero-point-36 percent, to end the week at 664-point-99.
 
On the foreign exchange market, the value of the local currency weakened five-point-eight won against the U.S. dollar to one-thousand-98-point-four won.