<![CDATA[AbstractThe purpose of this research is To find out the difference in the average Abnormal Return of stocks before and after the announcement of the Covid-19 pandemic. The variables used in this study were Abnormal Return and the announcement of the Covid-19 pandemic. The data analysis technique used in this research is the Parametric t-test and the non-parametric t-test. The population and sample in this study are companies listed on the LQ-45 index as a whole. The results state that there is a difference in Abnormal Return between before and at the time of the announcement of the Covid-19 pandemic, that there is a difference in Abnormal Return during and after the announcement of the Covid-19 pandemic and there is a significant difference in Abnormal Return before and after the Covid-19 pandemic. Keywords: Covid-19, Pandemic, Abnormal Return, Capital Market, Stocks, LQ-45 Index, Composite Stock Price Index, Companies, Indonesia Stock Exchange.]]>
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