Identify the economic impact of behavioral finance with an emphasis on efficiency and weekly turnover also temporal patterns in the Tehran Stock Exchange

This paper has done for research about behavioral finance context. In this paper we try to prove the existence of Saturday، Monday and weekend yield effect and the existence of Saturday، Monday and weekend transaction mass effect for 6 years (2007-2012). In this paper we use Student''s t-distribution. Goal of this research is recognition of investors’ behavior and earn more profit in Tehran exchange market. Also، this research characterizes somewhat market efficiency. Conclusion show that there are strong Sunday effect and semi-strong Saturday effect into other days and yield of Saturday is lower than other days. Also، there is strong Wednesday effect with positive yield into other days. About transaction mass، there is Saturday and Wednesday effect how Wednesday transactions mean is higher than Saturday transactions mean. These effects show that investors are hopeful in Wednesday to earn more yields on the next week and buy more stock، but in Saturday they are hopeless and began to sell their stock