Investigation of Relationship Between Noise Trading and Share Returns In Iran Stock market

The return volatility in financial markets depends heavily on the nature, behavior and desires of the trader. The aim of this study is to determine the appropriate trading strategy in Iran stock market based on the behavior of noise traders. In order to achieve this research aims, related data to total index and 96 selected companies has been used. The results of daily fluctuation analysis of the total index by using the Chow-analysis multiple variance test (CD) during the five-year period from 2011 to 2016 showed that the common culture of traders on Iranian stock market is noise trading. Statistically significant Behavioral Error (BE) of Iranian stock market traders point out that this market faces the noise trader risk (NTR). So the results of the survey of the effect of noise trader risk (NTR) lagging value on the stocks retune of the selected companies by using a two-variable regression model indicate that: firstly, noise traders have a significant effect on stock returns in this market, and secondly, the systematic noise effect (SNE) overcomes cash noise effect (CNE), That means that noise traders by adopting a noisy strategy and expanding their risk exposure on market can earn more than information traders with reverse strategy. The results of this research can help investors to adopt a suitable trading strategy and competent authorities to apply mechanisms to reduce noisy transactions.