Risk Types in Different Firm Life Cycle Stages with Emphasis on Ownership of Companies

The main purpose of this study is to investigate the risk situation (idiosyncratic risk, market risk and total risk) in Firm life cycle stages and the impact of State and non- State ownership on this relationship. In this regard, first, using the Fama-French Three-Factor model, the idiosyncratic risk in the sample firms was estimated. Market risk was calculated based on the standard deviation of the annual return of the stock index and the total risk is calculated by sum of market risk and idiosyncratic risk. The different stages of the companies' life cycle were determined using the patterns obtained from the three categories of cash flow statements (operating, investment and financing). In this research, the data of 136 firms have been used and in order to examine the research hypotheses, six regression models of panel data have been used. Respectively, idiosyncratic risk, market risk and total risk considered as dependent variable in these models. The results of estimating the final models show that idiosyncratic risk, market risk and total risk in the stages of introduction, growth and decline are higher compared to the stages of maturity and shake-out of firm life cycle stages. In addition, the results of this study indicate a significant effect of State ownership on the relationship between idiosyncratic risk and life cycle stages of firms listed in the Tehran Stock Exchange.