This research is an events study that aims to find empirical evidence of the Indonesian capital market investors' reaction to the event announcement Economic Policy Package Phase I Jokowi - JK. The study population was consistent stocks listed in LQ 45 index over the study period. The data used are secondary data from daily stock price five days before and five days after the event. The statistical test used to test the hypothesis is independent sample t-test and Wilcoxon Signed Rank test.The result of the calculation of Independent Sample t-test showed that there are significant positive abnormal returns around the date of the event, which means that investors respond to the event announcement Economic Policy Package Phase I Jokowi - JK as good news. Results Wilcoxon Signed Rank Test proved that there is a significant positive difference in the average abnormal return between the prior and current events, and there is a significant negative difference in the average abnormal return between current events and after an event.