Empirical compliance test of stockholders' and managers' logical decision making on the basis of Accounting information ambiguity High rates

Increasing the degree of information uncertainty from the perspective of shareholder uncertainty in the stock market as a result of the increasing information dissemination of companies, diverges the decisions of managers and shareholders. The main purpose of this study is to investigate the effect of high uncertainty on accounting information on the relationship between investment efficiency as one of the managers' decisions on the stock market value of companies and the abnormal return of companies as shareholder decision criteria. For this purpose, the data of 101 manufacturing companies listed on Tehran Stock Exchange and Tehran Stock Exchange during the years 1386 to 1396 are examined and tested using combined data. Both conditional and unconditional conservative criteria are used to decide uncertainty and measure the degree of uncertainty in accounting information. In addition, the Kruskal-Wallis test is used to test the comparisons of mean groups in order to test the rational decisions of managers and shareholders at high ambiguity level. The results show that between different groups at high ambiguity level only at high level of unconditional conservatism do managers 'and shareholders' decisions differ with accumulated abnormal returns. The results also showed that the (mismatch) decisions of shareholders and managers are reduced (increased) due to the high ambiguity of accounting information.