This paper characterizes the stockholders overreaction thorough return and price mean reverting behavior in specified ten major industry groups in Tehran Stock Exchange (TSE). For investigation of mean reversion presence, we use corporate firms from ten specified industry groups traded on the Tehran Stock Exchange and using a random walk with drift model with data over the period 2009-2013 period and recursive estimation in stability diagnostics test. The primary objective of this paper is to investigate mean reversion phenomenon in ten major industries including maximum number of real and nonstrategic investors with two different methods on quarterly return and monthly price time series. The results indicate that mean reversion occurred in the returns of these industry group. In addition, we use two major Unit Root Tests as complementary and final analysis. Out results also indicate that mean reversion takes place, significantly in eight industry groups and price time series in two industry groups follow a random walk process.

In this paper, we address the stockholder overreaction and mean reversion in specified major industry groups in Tehran Stock Exchange (TSE). This paper investigates this issue with panel data analysis and with particular attention to the Box-Jenkins Approach for stationary diagnosis with appropriate order and modeling stock prices with regard to specific industries. The study processes modeling of panels where stationary and mean reversion takes place in complementary analysis. The sampling intervals are explored monthly within the past few years. The results reveal that mean reversion presence in three industry group stock prices and industry stock prices would not behave in certain pattern.