ارتباط بين بازده پرتفوي با ريسك سيستماتيك و اهرم مالي در صنايع پذيرفته شده بورس اوراق بهادار تهران

A survey of relationship between the yield portfolio with systematic risk and financial leverage in accepted industries of Tehran exchange securities

Due to the fact that exchange is one of the parameters of economic development of the countries and many people invest in this market and in this process confront different question. this study aims at answering one of the above questions whhch is " is there any significant relationship between nondiversifiable risk, yield portfolio and financial leverage ? To answer this important question the following hypotheses were examined. 1- There is a significant relationship between yield portfolio and nondi versifiable risk. 2- There is a significant relationship between yield portfolio and nondiversifiable risk and financial leverage. 3- There is a significant relationship between financial leverage and nondiversifiable risk of stock. In this study. we will have a review of the present views regarding the structure of capital and the relationship between the ratio of Iiability and the rate of return on net worth and then the research tested the industries relating to hypothesis by collecting financial information of 70 common stock compomes. In testing the first hypothesis • the liner regression was used which showed a significant relationship between yield portfolio and nondiversifiable risk in testing the second hypothesis for which the liner regression was also used, the results indicated that financial leverage alone does not have any effect on yield portfolio but the reciprocal and simultaneous effect of financial leverage and nondiversifiable risk on yield portfolio is significant and at last testing the third hypothesis indicated no significant relationship between financial leverage and nondiversifiable risk