The Value Relevance of Information in Annual and Interim FinancialStatements in Tehran Stock Market

The main goal of investors is achieving wealth and it realizes through stockreturn. Therefore evaluating stock return is a main matter in stock market. Soproviding required information to interpret firm's condition and profitability is aprimary purpose of financial reporting. Accordingly financial statements andsupply notes are important information resource for investors.The objective of this study is examining the value relevance of information inannual and interim financial statements to explain stock return
.This researchinvestigates the relationship between financial reports information and abnormalreturn by using financial ratios, firm's size and cash flow from operation. So theexistence of relationship between them could be criteria for investors to anticipateinterim and annual abnormal return and facilitate investing decisions. Overall, thefindings show that for explaining stock return interim financial statements aremore informative than annual financial statements.