本研究利用事件研究法探討企業集團領導人參與政治選舉事件對集團概念股之股價是否造成異常報酬及市場是否具備預知該選舉事件發生之能力，進而推論投資人之投資心態與行為。從檢定結果顯示，在郭台銘董事長宣布參選之事件日前第二日之P值(3.5%)呈現相當顯著之水準，且平均異常報酬率為1.78%，此現象說明了鴻海集團各概念股在此事件中獲得投資人的追捧並極力做多，從而導致其股價有正向顯著反應。再者，由檢測結果發現平均累積異常報酬在事件日前第十日累積至事件日前第二日之P值(7.19%)及前第一日之P值(6.94%)有相當顯著反應，但從事件日之後的累積期間皆無顯著反應。此結果顯示郭台銘董事長宣布參選事件日前一段時間，市場已有相關資訊揭露之現象，而在事件日後整個社會及投資市場的關注，對於郭台銘董事長棄商從政後的鴻海集團未來之經營是否能夠像以往一樣的亮麗穩健感到存疑。

This study aims to explore whether the political campaign announcement of Foxconn chief Terry Gou will result in significant abnormal rates of return on its affiliated firms by the method of event study. We also intend to further examine if there exist information leakage phenomena in this event. Our empirical results show that positive average abnormal return 1.78% was yes indeed examined significantly with p-value 3.5% the second day prior to the event. In addition, information leakage can be significantly justified within in our cumulative average abnormal return testing findings, which show that the stock market has revealed this crucial information the second day (p-value 7.19%) and the first day (p-value 6.94%) prior to the event. The results highlight that investors not only show passionately to support Terry Guo’s political campaign but also worry about Foxconn sustainable competitive advantage without its chief at home.