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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of Finance and Managerial Accounting
- نوع مقاله: Journal Article
- کلمات کلیدی: Stock Returns,Optimal Portfolio,Macro indexes,time-varying parameter method,dynamic models
- چکیده:
- چکیده انگلیسی: In this study, 3 models of Time-Varying Parameters (TVP), Dynamic Model Selection (DMS) and Dynamic Model Averaging (DMA) and a comparison with the Ordinary Least Squares (OLS) method in MATLAB in the time period 2003-2013 (with data on a monthly basis) are discussed. In the present study, the variables of unofficial exchange rate changes, interest rate changes and inflation in oil price forecast returns for stocks in Tehran Stock Exchange are used. The study concludes that dynamic models with time-varying parameters are more accurate in predicting returns in the Stock Exchange, in a way that the MAFE and MSFE models, DMA, DMS which have complete dynamics are more efficient than other models. As a consequence, it can be said that the variability of the coefficients of the variables in the TVP model cannot lead to higher accuracy in predicting returns in the Stock Exchange, and it is required that the dynamics of time-varying variables of the model used to predict stock returns be taken into consideration
- انتشار مقاله: 28-11-1394
- نویسندگان: Hosein Maghsoud,Fraydoon Rahnamay Roodposhti,Hamidreza Vakilifard,Taghi Torabi
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Mathematical Finance and Application
- نوع مقاله: Journal Article
- کلمات کلیدی: Audit Quality,Initial Public Offering,Auditor Opinion,Earning management,Discretionary accruals
- چکیده:
- چکیده انگلیسی: According to a method of earnings management activities that administrators can manage reported earnings from the definition of real activity. In particular they can be located across time and activities in a way that accounting period to achieve a certain revenue target. Conservative attitudes of auditors in presenting their views about the independence of the auditor can considered as a remarkable point in the audit function. The Purpose of this study was to investigate the effect of audit quality on earnings management real time IPO companies. For this purpose, the data of 128 companies listed on the Tehran Stock Exchange during the years 2007 to 2017 were evaluated. The results indicated that the audit quality increases in the year of initial public offerings. The results also demonstrated that there is a significant and positive relationship between the audit fees in the year of initial public offerings and the audit fees in the year after the initial public offerings. Also findings of the research show that earnings management through accrual items has a positive and significant relationship with initial stock offerings.
- انتشار مقاله: 11-10-1397
- نویسندگان: Maryam Akbaryan Fard,Hamidreza Vakilifard,Hashem Nikoumaram
- مشاهده