摘要：Research on the stock split is often done. Results from these studies vary, butbasically can be divided into two groups. First, stock split is declared pure onlyas cosmetics. Second, stock split is declared as real effect on the share. Differentopinion often caused controversy. The purpose of this research is to reviewwhether it really can affect the stock split share prices and trading volume interms of an individual and the whole stock as a portfolio. Sampling conducted inthis study is using purposive sampling method. The sample in this study is fivecompanies. Paired t-test is used to test the presence or absence of changes inshare prices and trading volume before and after the stock split, with asignificance level of 5%. It can conclude that stock prices and trading volumesexperienced a significant difference after the split when it is viewedindividually. Conversely, when it is viewed as a portfolio, the difference in stockprice and trading volume before and after the split is not significant.
