Abstract:

A company that canincrease its value will also be able to improve the well-being of the owner or the shareholders. To a company that issues stocks in the capital market, the stock price in the stock exchange is the indicator of a companys value. Good company value is identified from the companys performance it is also identified from the stable or increasing stock price.This present study analyzed the influence of investment decision and market capitalization on company value. It involved companies listed in the Jakarta Islamic Index (JII), and aimed to formulate a matter of consideration for investors. A quantitative descriptive method was employed to investigate the correlation and influence between variables. The result showed that: (1) investment decisionpartially influenced company value with regression coefficient value of 1.721 and significance value of 0.000 (2) market capitalization partially influenced company value with regression coefficient value of -0.163 and significance value of 0.041 (3) investment decision and market capitalization simultaneously influenced company value of companies listed in the JII with f-count value of 330.698 and significance value of 0.000. Moreover, the adjusted R2 test acquired value of 0.924. The number indicated that company value was influenced by investment decisionand market capitalization by 92.4 percent, while the rest 7.6 percent was due to other variables.

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