The purpose of this study is to verify the impact of international financial reporting standards (IFRS) adoption on the quality of accounting performance and efficiency of investment decisions in the Saudi business environment as an emerging economy. In this study, content analysis approach is adopted for examining the annual reports of Saudi companies listed in Saudi stock exchange market during two periods: the pre-adoption of IFRS period during the year of 2016 and the post-adoption of IFRS period during the period 2017-2018. The study uses accounting information, accounting conservatism, earning management as alternative variables of accounting performance quality. In addition to accounting profit quality, liquidity and cost of capital are also used as alternative variables for the efficiency of investment decisions. The study finds that there was a positive impact of IFRS adoption on the quality of accounting performance, since it was positively related to both the qualitative characteristics of information and accounting conservatism, while it was negatively related to earning management. IFRS also improves the efficiency of investment decisions, as it was positively related to both profit quality and liquidity while it was negatively related to cost of capital.

Shareholders expected return is normally impacted by informational risk and informational asymmetry, on the other hand, creates informational risk. Thus, investors demand greater risk premium in the case of informational asymmetry and in turn corporate expenditures increase. In this study, we determine the relationship between informational asymmetry and capital cost. The study uses information of 109 companies listed in Tehran Securities Exchange over the period of 2005-2010 and the results suggest a positive and significant relationship between informational asymmetry and capital cost. In addition, the results from present research indicate that when capital markets are competitive, there is not a significant relationship between informational asymmetry and capital cost. But when markets are partially competitive there is a significant relationship between informational asymmetry and capital cost.

Most financial managers believe that there are different factors hindering decision-making about the capital structure of a company. This hindrance is so that, in some financial management literatures capital structure is called the mystery of capital. Financial managers widely believe that financial leverage enjoys a noticeable status in managerial decision making as well as management of the framework of balance sheet. The primary purpose of this research is to present applications of equity modules and to study effective factors on such models on Tehran stock exchange. The study covers data over a period of five years from 2001 to 2005. The study analyzes and tests relevant data to firm’s debt ratio and corporate size as effective factors on cost-of-equity. The preliminary findings indicate that contrary to the commonly held belief in financial management theorems, debts ratio has the least effect on cost-of-equity. Nevertheless, the study suggests that the variant of company’s size has a meaningful relationship with cost-of-equity. To calculate cost-of-equity, CAPM, Gordon and return ratio methods are used. Findings show that CAPM has more validity compared with other varieties. On the other hand, the results indicate that there is a 95-percent probability proving that liquidity has a significant negative effect on financial leverage.