There are potential risks in Korean stock market result from national specificity, which is called ‘Korea
Discount’. Among this, the representative risk in Korean stock market is North Korea’s provocation and
threat. Actually due to the learning effect caused by North Korean continuous nuclear experiments, the
effect seem to reduce slightly. But on every day of the nuclear experiment from 2006 to 2016 for 5times,
except from some defensive stock, most stock showed drop decline. This may be an important external
factor that can not be ignored for investors. So this study analyzed the impact of North Korea nuclear
issue on South Korea stock market especially in aspect of industry group. As a result, the degree and
aspect of response was different in each industry group and we could extract response patterns of stocks
divided by industry by repetitive nuclear issue that occurred 5times. Using this, investors can have an appropriate invest decision with reference to response pattern of their stocks divided by industry rather than
an outside guess that the impact of North Korea Nuclear issue on KOSPI seems to be small.