فهرست مطالب samaneh bari

The purpose of this study is providing a model for investors' beliefs, considering the political, social, economic and cultural characteristics of the country. So, regarding the exploratory approach of the research and the specific conditions of investments and capital market of the country, in this study is used qualitative research method and grounded theory approach and the interviewees are selected by snowball sampling method. Taking into account the views of capital market participants, the main beliefs of micro investors have been identified. After conducting 24 interviews and obtaining theoretical saturation, "Investor's belief model" including the causal and intervening conditions, context, strategies and consequences is presented. The research findings show that in the present context, the factors of "information asymmetry, lack of awareness, cultural factors, mental constraints, social factors and emotions" as causal factors affect the core category (investor's belief) and the categories of "education system, information systems, Political factors, corruption, media and inefficiency of intermediary financial institutions "as intervening factors, affect the strategies and consequences resulting from investor beliefs. To maximize the richness of the model, strategies and consequences are categorized and interpreted at two levels.

Financial and investment issues are one of the essential areas of every person's life that make one makes many decisions in different situations; however, it is the beliefs of the individual that make the decisions and shape their behavior in the financial arena. Referring to the lack of in-depth and, as far as possible, comprehensive research in this regard in the Iran context, a careful examination of the factors influencing investor beliefs and the importance of each factor in making an investment seems necessary in analyzing behavior, justifying a decision, and providing effective solutions to improve the process of judgment and decision making. So, the purpose of this study is to identify investor's beliefs, factors influencing them and rank the categories in the capital market of Iran. To this end, after identifying the beliefs of investors and the factors affecting them by interview, the hierarchical analysis process (AHP) and the DEMATEL technique have been used to prioritizing investors' beliefs and ranking the factors affecting them, respectively. Following a deep interview with 24 experts and the collection of beliefs and causal factors through coding, a questionnaire was prepared to prioritize the identified factors and was completed by experts who, in addition to having sufficient knowledge about investor's behavior were well acquainted with Iran capital market. Based on the findings of the research, it was found that among the 14 beliefs known by the experts, over confidence, loss aversion, self- attribution, self-control and regret – aversion are the most significant beliefs observed in the Iran capital market. In addition, among the six causal factors identified, emotions, investor capacity limitations for processing existing information and their lack of awareness of the fundamental issues of economy and investment were identified as the most important factors influencing investors' beliefs.

The global economy faces financial crisis every so often. In recent years, the financial crisis has affected the global economy and all countries are involved in, diirectly or indirectly. The purpose of this research is to study the impact of the global economic crisis on the financial leverage of listed companies in Tehran Stock Exchange. To test this effect, 87 companies listed in Tehran Stock Exchange are studied during the period 1385 to 1390. In this study are used earnings before interest and tax, depreciation expense, assets, research and development expenses and the dummy variable, global economic crisis as the independent variables. The book debt ratios and the market debt ratios are used as dependent variables (the financial leverage). The results suggest a significant relationship between the global economic crisis and the market debt ratios. But no significant relationship is found between the global economic crisis and the book debt ratios.

In this study is examined the role of return dispersion in the interpreting of the accrual anomaly and also is assessed the impact of return dispersion on the risk premium of low and high accrual portfolios. For this purpose, sample of 113 firms listed in the Tehran Stock Exchange were studied in the time period from 2009 to 2014 To test the study hypothesis is used Fama and French's pricing model.
The results showed that the dispersion of returns / relative return resulting in a significant and positive risk premium over the stock and accrual portfolio and there is a significant difference between the impact of the relative return dispersion on risk premium of low-accruals and high-accruals companies.

The global economy faces crisis every so often. In recent years, the financial crisis has affected the global economy; all countries , directly or indirectly , are involved . The purpose of this research is to study the impact of the global economic crisis on the capital structure of listed companies in Tehran Stock Exchange. To test this effect, 87 companies listed companies in Tehran Stock Exchange during the period 2007 to 2014, are studied . In this study, earnings before interest and tax, depreciation expense , assets, research and development expenses and the dummy variable ,global economic crisis, are used as the independent variables. The book debt ratios and the market debt ratios are used as dependent variables (the capital structure). The results suggest a significant effect the global economic crisis on the capital structure.