Investor sentiment under representativeness heuristic: The case of Tehran Stock Exchange

Subject Areas : Journal of Investment Knowledge

Mehdi Rezayati ¹ (MBA student (Major: finance) at university of Economic Scienses)
Kazem Chavoshi ² (Associate Professor at University Of Economic Scienses)
Mohsen Sohrabi araghi ³ (Associate Professor of Allameh Tabataba'i University)

Received: 2016-03-15 Accepted : 2016-05-03 Published : 2016-09-22

Keywords: Behavioral Finance, investor sentiment, Representativeness Heuristic, Overreaction, ARMS Index,

Abstract :

Too many researches, in spite of standard finance show that investors are not completely rational and investor sentiment plays a key role in prediction of their behavior. Behavioral finance claims that agents, under the psychological phenomena's, deviate from rational behavior. In this research we have investigated the effects of unexpected earnings on investor sentiment, under the representativeness heuristics phenomena. Investor sentiment is measured by ARMS index and the research methodology is based on Granger causality test and also event study. Data's are market and accounting data of Tehran stock exchange listed companies, between the years 2001 to 2013. Results indicate that investor sentiment is predictable by past unexpected earning's.

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