Considering the relationship of accounting profit and operating cash with systematic risk and its consistency in Tehran stock exchange

Information is wealth and accompanied by profitability and advantage like any valuable good. Therefore having useful information needs spending cost and for saving this wealth its necessary tools should be prepared and proper system should be written. Nowadays accounting is reminded as an information system, accounting information plays undenying role at making economic decisions. Managers, investors, creditors and other users for doing responsibility and their roles use financial reports that are supplied by accounting system.Such important tool that investors apply for predicting risk and output of stock is model of valuating capital assets. In this model the main variable for predicting output of any company is variable of systematic risk. Therefore it seems reasonable that investors in the process of decision-making firstly need information to be able to determine systematic risk related to their investment (Asadi,2013).Effective strategies for predicting systematic risk that is suggested is applying relationship of accounting with systematic risk. Therefore the fundamental goal of this research is considering relationship between related information to accounting profit and operating cash flow(accounting information) with systematic risk and determining ability of each of these information in predicting systematic risk in Tehran stock exchange so that it become as a direction for decision-making of potential investors for assessing stocks in capital market.On the other hand in this research we consider constancy of β indices and its effect on investors of Tehran stock exchange. The most important problem that investors and other users face it is that among information presented by accounting system which one has information content and is useful at the process of decision-making and which one has pore information power and is more important at decision-making.