Employee The ultimately purpose of the research is to investigate the respond of Pakistani cement industry during the long March headed by Mr. Imran Khan Chairman PTI against the existing regime of Pakistan. The data of daily share prices of the top 14 companies of the cement industries have been gathered by developing the event windows from 4th August, 2014 to 30th December, 2014. The data of daily KSE index has also been collected for the same period and abnormal returns (AR) and cumulative abnormal returns (CAR) have been calculated. The data has been collected from Yahoo Finance and business recorder. The significance of daily change of AR and CAR has been tested by using t-statistic, which depicted that both the AR and CAR has shown significantly change in pre-event, Post event and during the event windows. Furthermore, the results also depicted that average (Mean) of both the actual returns (ACR) and expected returns (ER) are significantly different to each other. The CAPM has been applied to determine the expected returns (ER). The study is helpful for the investors that they should beware and conscious during the political instability in Pakistan as the cement industry responds significantly during the said situation. Furthermore, the study is also helpful for the management of cement industry to be conscious during the scenario of political instability as the systematic risk will be high during this situation.