This research aimed to know the impact of flood in Jakarta and Haiyan
Typhoon in Philippines towards each stock market in two countries in 2013. By
using phenomenon which is happened, event study will be conducted to know the
significant impact on its Average Abnormal Return on each country. In order to
know the result, it will used by calculating Abnormal Return which is get from the
Return of companies’ stock return on daily basis in the event period of different
country. The result will be tested by using paired sample t-test, to know which is
the before and after event in Indonesia and Philippines have significant impact or
not in the its abnormal return. The findings of this research, there is no significant
different average abnormal return between before event day and after event day of
both natural disaster events in Indonesia and Philippines.