This study aimed to present a model for portfolio risk premium assessment of companies listed in Tehran Stock Exchange. In order to achieve this purpose, monthly data of 150 companies listed in Tehran Stock Exchange during 2007-2017 was used. In this study, the predictive powers of FamaFrench three-factor model [11], Carhart four-factor model [1], Fama - French five-factor model [24], Brousseau...

Objective: Thisresearch has studied the effect of five main factors including competence of internal audit department, size of internal audit department, relationship between internal and external audit, management support for internal audit, and independence of internal audit on the internal audit effectiveness in companies that listed in the Tehran Stock Exchange in 2017. Methods: Data was c...

the purpose of this study is to measure how much the stock prices decline ofter ex-dividend date in tehran stock exchange. another parpose of the study is to investigate whether the marginal tax rates of stock holders have any effect on the dividend policy of the companies listed in tehran stock exchange. the results showed that the decline in stock price was less than the amount of dividend pe...

In recent years stock exchange has become one of the most attractive and growing businesses in respect of investment and profitability. But applying a scientific approach in this field is really troublesome because of variety and complexity of decision making factors in the field. This paper tries to deliver a new solution for portfolio selection based on multi criteria decision making literatu...

due to the fact that assets are recorded at their historical value and they may include unrealized gains (losses), managers may manipulate earnings through the sale of these assets and provide financial information which is not accurate and reliable. the aim of this study is to investigate the relationship between income from asset sales, earnings change and leverage of companies listed on tehr...

Background: According to the sustainable development theory, managers have a high incentive to observe ethical principles in business operations. However, some of the immoral behaviors of managers in earnings manipulation lead to ethical failures in companies. Accordingly, the purpose of this study was to analyze the relationship between sustainable development performance and managers’ immoral...