A Study of the Firms Factors on Capital Structure (Financial Leverage)

Financial managers have been involved in taking the decision in financing, considering cost-benefit analysis of every method and checking on the internal rate of return and services rate. This phenomenon is one of the most troubling subjects in capital markets, due to appearance of agency paradigm return variation and the obtained risk of companies financing. Those factors which affect the ideas of financial managers concerning capital resources and consumerisms determine the reason for choosing a special resource regarding the environment and current events into companies. In this research-with an emphasis on the financial operation of the public companying accepted in Tehran Stock Exchange- Capital structure and the category of internal parameters variations in some Firms are reviewed to present some new structures to develop financial markets and create specific sources. This points of view with due regard to conformity principles-including the gearing principle and environmental inconstant variables and also benefits and defects of financing’s different ways- can be used to adjust the suitable decisions to provide necessary capital for the companies, in addition they lead to greater efficiency and effectiveness.The results show that the prevailing conditions in the financing performance in different industries differ from using of the financing leverage. Thus, is not possible to determine a comprehensive model, to be able to cover the studied society, because of the prevailing economical conditions. But, the expected results would be confirmed remarkable, with separating equations and industries, with regarding ownership and the kind of industry.