Effect of natural and legal persons trading in the occurrence of price bubbles in Tehran Stock Exchange

Subject Areas : Journal of Investment Knowledge

Mirfeyze Fallahshams ¹ , Meysam alimohammadi ²

1 - Faculty Member of Islamic Azad University Central Tehran Branch
2 - Master of Financial Management, University of Economic Sciences

Received: 2014-10-01 Accepted : 2014-12-30 Published : 2014-12-30

Keywords: Tehran Stock Exchange, Price Bubble, individual and institutional t, Market efficiency, Runs Test,

Abstract :

This paper examines the impact of individual and institutional trading in a bubble in the price of listed companies in Tehran Stock Exchange. First, through some tests such as Runs test (test based on rows or flow test), skewness, stretching and duration dependence was found in the Tehran Stock Exchange for the 1391/01/01 up to 1391/09/30 bubbles occurred. In the period between the day and the time series of 5-minute check prices and deals from individual and institutional persons in the interval 5-minute review We have covered the impact of that effect. After performing tests to detect bubbles in the companies studied, the samples were divided into two groups with no bubbles and speculative bubbles. To investigate the impact of the behavior individual and institutional persons in the company speculative bubbles, Transactions of the group of people at a time series between the day 5 minutes from and Using binary Logit regression model to examine the impact of these two transactions are dealt with in the incidence of bubbles. The results of the model indicate that individuals have a greater impact than legal entities, in the development of research have ranged from speculative bubbles.