Effects of Quality Management Systems on the financial performance of the Companies listed in Tehran Stock Exchange

Quality is a topic which the most attentions are allocated to it by business companies. This topic which can be studied from different aspects is considered as primary precedence of organizational strategies. According to using different quality control systems in the country and favorites of many manufacturing and service companies for establishing such systems and obtaining valid quality certification in order to enhance quality level of production and receiving a great share of market, considerable attention is allocated to this topic in our country. Hence, the most application is allocated to system of international standards quality assurance - ISO 9000.
In this paper, efficiency of establishing this international standard in the companies which are listed on the stock exchange has been evaluated. So, companies which are holder of this standard certification were determined, a counterpart was chosen for each company in order to comparison. Then, we studied effect of establishing this management system on 3 indexes as sales growth, margin, earning per share.
The obtained data from paired observations showed that obtaining ISO 9000 certification just could have effect on sales growth level. It does not have any significant effect on margin and EPS.