This research is based on the sample of Taiwan listed companies that employed to buyback-short during the study period from 2000 to 2019. The event study method is used to test whether there is an average abnormal return or cumulative average abnormal return that is significantly different from zero in the 10 trading days around the last buyback-short. Furthermore, the comparison analysis of the stock price behavior around the last buyback-short before the closing dates of the shareholders' meeting, ex-dividend and ex-rights respectively. The results show that the stock price fluctuates sharply around the last buyback-short. The stock price of Taiwan listed companies has a significant positive abnormal effect before the last buyback-short, and then there is an overrecation of price reversal. Regardless of the stock price behavior around the last buyback-short of the stockholders' meeting, ex-dividend, and ex-right, there are similar conclusions.