Capital asset pricing model (CAPM) suggests that there exists a linear relationship between stock beta and profit. Beta, in this relationship, measures the level of systematic risk to which an asset is exposed. Accordingly, the higher the beta of an asset is, the higher the return must be. However, studies investigating this relationship have produced mixed results and indicated that the validity of CAPM changes according to the data and the methodology which is used. These and similar tests have led us to question the beta coefficient’s ability to measure the risk. As systematic risk is higher, especially in developing markets, the role of the beta coefficient becomes more significant. In this study, CAPM time series method has been used and the result has shown that the model can statistically explain the changes in the rate of the profits. However, against long odds, it also has shown that the relationship between beta coefficient and profit isn’t positive