Relationship between Clarity of Stock Market Information and The Appearing of Price bubble

In the bubble، State of Stock erchange the stock valuation of companies based on their actual performance and price are not taken as an indicator of performance can not show it. The present study investigated the relationship between clarity and price bubbles companies incidence of Tehran Stock Exchange during the years 2008 to 2010، by using the continuity and independence tests (chi-square) and binary logistic regression is. These tests on 70 companies of which are chosen amony 400 companies has been implemented. Hazrabtda research companies in real returns on a daily basis using specialized software such as the securities and exchange process or and software to deviseane wRA and then collected by Excel software، the initial processing was done on them and these data were used for the test sequence spss environment. The first hypothesis of the study is Hbabdar clarity in companies، The results indicate that significant differences exist in the clarity of information on companies Hbabdar And clarity (distributed) information between the companies is average. The second hypothesis is also investigating transparency in companies Ghyrhbabdar The results indicated that there was no significant difference in the clarity and transparency of information Ghyrhbabdar companies (distribution) information between the companies is very high. The third hypothesis of the continuity test result Sindicate that there is a relation between the openness and clarity of price information and occurrence of bubbles in companies and in companies Ghyrhbabdar Hbabdar average clarity of informationis is very much.