One of the objectives of this research is to know the types of shares that are undervalued and overvalued by applying Capital Asset Pricing Model (CAPM) method, based on stock return and risk as a consideration in stock investment decision making process. In this study using the population on the company's shares listed in the Compass Market Index 100 period November 2014-November 2017. Sample testing is done by processing data from the company's financial statements.The number of samples used in this study as many as 30 company shares, using purposive sampling method. The results showed that from 30 samples, showed 16 stocks included into the stock efficient (undervalued), meaning that the stock has an individual stock returns greater than expected rate of return. Therefore, the decision taken should sell the shares.While the remaining 14 shares are included in the stock is not efficient (overvalued), meaning that the stock has an individual stock return rate is smaller than the expected rate of return. Therefore the decision taken should sell the shares.