Assessing the Behavioral Reaction of Investors to the Price Change Using the Speed of Price Adjustment Approach to the General Information and Its Relation with Future Return

In Recent Decades, The Financial Sphere has entered a New Era of Contempt for Some of the Assumptions of Modern Economics and Finance. One of These Assumptions is the Rationale of the Investors, which has been Seriously Challenged and Is Now Being Strengthened by the Fact That Prices are Determined more by Attitudes and Psychological Factors than for Fundamental Variables and Therefore the Study of Market Psychology has Become More Important. The Purpose of This Research is to assess the Reaction of Investors to Price Changes by Measuring the Speed of Price Adjustment Compared to the General Information in Tehran Stock Exchange and a Model for Yielding Additional Returns in Futures. The five-year Research Period is from 2011 to 2016. The Statistical Population of the Study is the Companies listed in Tehran Stock Exchange and the Results Show that the Rate of Adjustment of Prices is Different from Each other Based on Specific Company Variables, and the Difference in the Rate of Price Adjustment can Cause Make Extra Returns.