zahra shirazian Articles List

List of Articles zahra shirazian

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1 - Clustering of volatility and its asymmetry in Tehran Stock Exchange
زهرا شیرازیان hashem NIKOUMARAM Taghi&acute;&acute;&acute; TORABI

The purpose of this study is to investigate the clustering of fluctuations and its asymmetry in Tehran Stock Exchange. Large changes in prices tend to be large changes and small changes tend to be small changes that are called clustering of fluctuations. On the other ha More

The purpose of this study is to investigate the clustering of fluctuations and its asymmetry in Tehran Stock Exchange. Large changes in prices tend to be large changes and small changes tend to be small changes that are called clustering of fluctuations. On the other hand, higher volatility fluctuations, They tend to form more clusters than small fluctuations, which are referred to as clustering oscillations of oscillations. The volatility of return on assets can directly affect the price of transaction options and the risk of stocks and portfolios. This research is a practical and quantitative research. The statistical society of the time series of the index of Tehran Stock Exchange and the sample used in the time series of return on the total index in the period from the beginning of 2008 to August 2012 is. The index values are extracted from the new rational software and then the logarithmic yield is calculated and analyzed with the Eviews software. Based on the Box and Jenkins approach, the mean ARMA equation was obtained and ARCH test confirmed the existence of clustering fluctuations. The TGARCH model showed asymmetry in volatility and leverage effect. According to the AKIC statistic, the best GARCH model was used for extraction of fluctuations, ETGARCH was introduced. Manuscript profile
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2 - Investigating the Relationship between Political Rumors and Perceptual Error of Tehran Stock Exchange Investors by Considering the Intermediary Variable of Biographical Characteristics of Investors by Structural Equation Modeling
زهرا شیرازیان

The present study investigates the role of the mediator of the biographical characteristics of investors on the relationship between political rumors and their perceptual error by modeling structural equations. The present study was conducted in terms of the method of c More

The present study investigates the role of the mediator of the biographical characteristics of investors on the relationship between political rumors and their perceptual error by modeling structural equations. The present study was conducted in terms of the method of correlation research in terms of the purpose of an applied research and in terms of data collection method, a quantitative study. The statistical population of the study was investors of Tehran Stock Exchange with unlimited number and the sample was estimated using Morgan and Kargzi tables with a simple random sampling of 384 people. The tool for measuring political rumors, the 9 questionnaire of Khademi Grashi and Ghazizadeh (2007) and the instrument for measuring perceived error in the questionnaire of Saadi 24 et al. (2010). The results of structural equations showed that political rumors affected the perceived errors of investors in Tehran Stock Exchange. Also, the dimensions of political rumors, including statements by political officials, political developments inside the country and foreign political developments, increased the level of perceptual error of investors. Also, biographical characteristics of investors influenced the relationship between political rumors and its dimensions with perceptual errors of Tehran Stock Exchange investors. Manuscript profile
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3 - Investigating of effect herding behavior types among analysts on stock price by network analysis in Tehran Stock Exchange
Zahra Shirazian

Herding behavior among security analysts is described as similar behavior by analysts when forecasting main finance ratios of public companies and when giving investment recommendations. This type of behavior can be divided into two categories based on the different dri More

Herding behavior among security analysts is described as similar behavior by analysts when forecasting main finance ratios of public companies and when giving investment recommendations. This type of behavior can be divided into two categories based on the different driving forces behind the analysts’ herding behavior.. For instance, if one analyst lacks the ability to research and provide recommendations, he or she  may follow, or even copy, a famous analyst’s reports. Such  action will result in herding behaviorIn this  paper, we  build  undirected weighted networks to study herding behavior among analysts and  to analyze the characteristics and  the  structure of these networks. We then construct a new  indicator based on the  average degree of nodes and the  average weighted clustering coefficient to research the various types of herding behavior. Our findings suggest  that every industry has, to a certain degree, herding behavior among analysts. Furthermore, we relate the  two  types of herding behavior to stock  price  and find that uninformed herding behavior has a positive effect  on market prices, whereas informed herding behavior has a negative effect.   Manuscript profile
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4 - Investigation of Financial Advisors Competencies Role in Perceived Investment Value InTehran Stock Exchange
Zahra Shirazian

The most important microeconomic theory and theories of modern finance is that the value of the investment, to increase its profitability, rationality and perfect information, lies. But recent research shows that the value of the investment aspects and influenced by var More

The most important microeconomic theory and theories of modern finance is that the value of the investment, to increase its profitability, rationality and perfect information, lies. But recent research shows that the value of the investment aspects and influenced by various factors, including the role of financial advisor. This study aimed to investigate the role of the financial advisor in the perceived value of investment necessary competencies investors Stock Exchange of Hamadan. This kind of study is one of few studies, surveys, applied and quantitative and cross-sectional. The study population active investors in the Stock Exchange of Hamedan have been an infinite number randomly and without replacement sample of 387 members selected from among them. Data collection instrument was a questionnaire and field data collection. In order to analyze the data structure based on partial least squares path modeling methods were used. The results showed that the competencies necessary financial advisor significant impact on the perceived value of investments of investors. As well as direct evidence of a positive impact and ethical competencies, technical and financial advisor on the perceived value of the investment was emotional. Manuscript profile

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List of Articles zahra shirazian