سید حسن صالح نژاد
ابراهیم سهراب فر
شهرام درقندیان
مصطفی منصوری خواه

One of the most important purposes of the International Accounting Standards is presenting useful information for decision making. This purpose has been considerably emphasized base on usefulness of financial information for predicting in different standards. In the present study, net profit and book value of the companies is regarded as the representatives of the accounting numbers and their ability have been examined for clarification the market value of the companies in after and before the period of Accounting Standards Requirements. Sample of study consists of ۸۶ companies among accepted companies in Tehran stock market and the period of the study contains ۱۶ consecutive years from ۱۹۹۴ to ۲۰۰۹ which consist of two eight-year periods prior to the Accounting Standards Requirements (۱۹۹۴-۲۰۰۱) and the period after Accounting Standards Requirements (۲۰۰۲-۲۰۰۹). The results of the study confirmed information content of accounting profit. The results also represented that the requirements of Accounting Standards has had significant positive impacts on information content of accounting profit. According to the results, the book values of affiliate's ´wages hasn´t have information content and the requirements of Accounting Standards hasn´t affected on it.

Required by accounting standards, Market value of the company, Book value of equity, About earnings, الزام استانداردهای حسابداری, ارزش بازار شرکت, ارزش دفتری حقوق صاحبان سهام, سود حسابداری