Analisis Reaksi Pasar Terhadap Perubahan Peraturan Kemenperin Nomor 31M-Ind Per 8 2017 Pada Perusahaan Manufaktur di BEI

This study aims to determine the market reaction to changes in regulations in the Ministry of Industry. The methodology used is event study to examine the information content of an announcement. The subject of this research is a manufacturing company listed on the Indonesia Stock Exchange, the sample selection choosen by purposive sampling. The data analysis technique used was the one sample t test on hypothesis 1 and the Mann Whitney test for hypothesis 2. The test results of the market reaction showed a reaction to changes in the Ministry of Industry regulation on the company manufacturing on the third day before the announcement of regulatory changes and the second day after the announcement of regulatory changes. There are differences in the reaction between manufacturing companies and non-manufacturing companies in the third day period before the announcement of regulatory changes and the second day after the announcement of regulatory changes. Keywords: market reaction, abnormal return, information content