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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: Accounting,Speculativem,bubble,Mental
- چکیده:
- چکیده انگلیسی: The aim of the study " The Different Role of Mental Accounting on Optimal Portfolio Based on Speculative Bubble on companies listed in the Tehran Stock Exchange" is the 10-year study period listed in the Tehran Stock Exchange during 2008-2017 were analyzed.The data of 110 firms were analyzed by using statistical softwares including Matlab, spss20, Eviews7 and Lingo in the studied years. In this research, mental accounting is based on Fernandez, The speculative bubble based on the gilium pattern are used as a risk measurement indicator. The result of testing the above hypotheses showed that for the calculated returns because it is greater than the error level, the hypothesis of equality of the average returns of the portfolios is not rejected. In terms of speculation bubble (subject to speculation) based on subjective accounting there is no significant difference and efficiency based on standard deviation index is not higher. The result of the statistical test of these hypotheses shows that the significance value for the calculated returns is greater than the error level, the hypothesis of mean inequality of portfolio returns (research hypothesis) is rejected and in other words the speculative bubble portfolio returns (greater than Portfolio returns are not without bubbles.
- انتشار مقاله: 22-10-1398
- نویسندگان: Maryam Saberi,Roya Darabi,Mohsenmohsen Hamidian
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: CEO Overconfidence,Naive Bayesian Classification Algorithm,Probit Regression
- چکیده:
- چکیده انگلیسی: Corporate directors are influenced by overconfidence, which is one of the personality traits of individuals; it may take irrational decisions that will have a significant impact on the company's performance in the long run. The purpose of this paper is to validate and compare the Naive Bayesian Classification algorithm and probit regression in the prediction of Management's overconfident at present and in the future. Financial during the years are 2012 to 2017. To support the theoretical results, the samples were the companies admitted to the Tehran Stock Exchange, (financial data of 1292 companies/year in total). Data collection in the theoretical part of the study benefitted from the library method, and for calculating data, Excel software was used, and in order to test the research hypotheses Matlab 2017 and Eviews10.0 were used. The empirical findings demonstrate that, Gained nonlinear prediction model of the Naive Bayes Classification algorithm, has high ability to predict, and the Probit regression model, has limited ability to predict the over-confidence of management. Finally, the artificial intelligence prediction model (naive Bayesian classification algorithm) has better result compared with statistical binary regression prediction model (probit regression).
- انتشار مقاله: 23-10-1397
- نویسندگان: Shokoufeh Etebar,Roya Darabi,Mohsen Hamidian,Seiyedeh Mahbobeh Jafari
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: Stock Return,Tehran Stock Exchange,Fama-French Five-Factor Model,skewness
- چکیده:
- چکیده انگلیسی: Due to the complexity of financial markets and specialization of investment, the investors in financial markets need tools, methods and models by which they can choose the best investment and the most appropriate portfolios. Fama-French Five-Factor Model (FFFFM) is one of the newest methods among various methods for financial asset pricing and prediction of stock returns. The main aim of this research is to investigate the improved predictability of returns by inclusion ofthe skewness variable to FFFFM. The statistical population of this study consists of all manufacturing companies listed in Tehran Stock Exchange (TSE) during 2003-2014. 75 companies selected by random sampling method. The results of panel data test of FFFFM indicate the positive significant effects of book to market value ratio, size, growth opportunity, and profitability but a negative significant effect of the investment variable. By inclusion of the skewness variable in the FFFFM model, the negative effects of investment variable becomes positive. Also, skewness variable indicates a significant positive impact and that this inclusion improved the predictability of firm returns.
- انتشار مقاله: 02-02-1396
- نویسندگان: Shahla Rowshandel Rowshandel,Ali Asghar Anvary Rostamy,Iraj Noravesh,Roya Darabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Mathematical Finance and Application
- نوع مقاله: Journal Article
- کلمات کلیدی: CEO power indicators,pressured companies,product market competition
- چکیده:
- چکیده انگلیسی: The purpose of this study was to "Identify and explain the relationship between the power indicators of the CEO and the performance of the company under pressure based on the product market competitiveness in the companies listed in the Tehran Stock Exchange". According to this research, the 10-year period of companies listed in the Tehran Stock Exchange was investigated in 1395-1386. The data of 135 companies were analyzed using regression test using SPSS 20 and Eviews 7. The results show that the efficiency of management & integrity of management Is effective on the performance of the company in the companies under pressure on the basis of product market competition, but the effect of management conservatism was not confirmed.
- انتشار مقاله: 16-04-1398
- نویسندگان: Majid Aliabadi,Fatemeh Sarraf,Roya Darabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Mathematical Finance and Application
- نوع مقاله: Journal Article
- کلمات کلیدی: Stock Returns,Momentum,Market Conditions
- چکیده:
- چکیده انگلیسی: The purpose of this study is to compare the impacts of momentum on stock returns of companies listed in Tehran Stock Exchange in different market conditions. For this purpose, the sample size is 120 months from 2008 to 2017. The research hypotheses are estimated using multivariate linear regression using time series method. Based on the results of the hypotheses test, the momentum in each of the market conditions, including normal, ascending and descending conditions, has a positive and direct effect on the stock returns of the companies listed in Tehran Stock Exchange, which indicates the principle of investors' insatiability in the stock exchange Tehran seeking to maximize its return on investment with a certain risk that in a downside mode of market, their insatiability exits less and faster than their momentum conditions, which is a reason for investors' loss evasion in this situation.
- انتشار مقاله: 26-08-1397
- نویسندگان: Alireza Ghiyasvand,Roya Darabi,Mohsen Hamidian
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Mathematical Finance and Application
- نوع مقاله: Journal Article
- کلمات کلیدی: IFRS,Iranin accounting standard,reliability
- چکیده:
- چکیده انگلیسی: Accounting standards, are rules governing how to do accounting work, and specify what information must be provided in financial reporting. The main objective of this study was to compare the stronger accounting standards against weaker accounting standards which in this study, we compare accounting standards of Iran and international standard in terms of Rents. The population of the research is institutions member of accounting community; that to collect theoretical principles of the study, library methods and to collect statistical information, questionnaires were used. Cronbach's alpha coefficient was used for validity and reliability of questionnaire, and to analyse the data, Student's t-test, Kolmogorov - Smirnov test and Friedman test was used. SPSS21software was used to analysis. Time limit of this research involves the second half of 2016. The population of the investigation includes audit firms of Certified Public Accountants community. Findings from analysis of statistical data are at 95% reliability level, which reject us hypothesizes based on non-reliability, unsuitability and lack of understanding. We conclude that Iran's accounting standards relative to international standards from the perspective of professional judgment of auditors to determine the rent type, in terms of degree of reliability, intelligibility, functionality is more appropriate.
- انتشار مقاله: 20-03-1396
- نویسندگان: Seyyed Mohammad Ali Mirmasoumi,Roya Darabi
- مشاهده