摘要：The purpose of this present research is to examine the effectiveness of portfolio management in automotive industries of Iran as a one of the most important industries in Iran, and also in Tehran stock exchange (TSE) during the period between2010 and 2015. In order to examine companies- performance based on different portfolio theories; by using Sharp, Sortino and Sterling ratios. The results show that there is a meaningful difference between our statistical samples of study. Sterling-s ratio compare to other ratio showed a better performance. And also, except for Sortino ratio, other ratios showed a better operation of the automotive industries compared to market. Finally, the results of Kruska-Wallis test and the Square Statistic presented that using all the three types of these ratios in ranking the companies have not the similar results.
