The Effect of the Company's Life Cycle Cost of Equity Capital in Listed Companies in Tehran Stock Exchange

The accounting and financial literature for the cost of equity capital is provided by several factors, including the predictability of profit, profit stability and timeliness profit. The predictability, stability and timeliness of higher profits, lower cost of equity capital is expected. Among other factors affecting the cost of equity capital is a company's life cycle. On average, companies in the early stages of the life cycle have a high growth and profitability.The purpose of this research to find the relationship between company life cycle and cost of equity in listed companies on the Tehran Stock Exchange. Three hypotheses were tested in this study and a six year study period is considered from april 2009 to the end of march 2015 and the population of this research are the companies listed in Tehran Stock Exchange and totally 112 companies were selected. This research is a systematic sampling method (filter table). Data were collected through the application of rahavard novin. To analyze the data , Eiews and Excel were used.The research results have shown that equity cost has been increased in growth stage but decreased in mature stage and there is not a significant relation between equity cost and falling stage.