Modeling Speculative Bubbles in Tehran Stock Exchange Considering Social and Psychological Dynamics

Document Type : Original Article


Department of Economics, Faculty of Economics, Allameh Tabatabaei University


Stock market is one of the important markets in any economy and a good understanding of it is necessary for policy making both in individual and governmental levels. One of the phenomena seen in asset markets is bubble. Several works have been done about bubbles in Tehran Stock Exchange (TSE), but no one has developed a new theoretical model. Almost all of the atudies have used the mainstream approach, conventional econometric methods or an accounting approach. To consider the social and psychological dynamics, we applied Agent-based Computational Economics (ACE). The model is validated with the time series of overall index of TSE and the results are satisfactory. We showed that the presence of uncertainty about future fundamentals on one hand, and heterogeneous expectation and social and psychological dynamics , on the other hand can explain how a bubble in TSE is formed. The model developed here is simple and basic, and therefore can be a good basis for more full-fledged models of different markets. The results also show that the speed of learning has increased through time. 


-   Axelrod, R. M. (1997). The Complexity of Cooperation: Agent-based Models of Competition and Collaboration. Princeton University Press.‏
-   Babaei S. M. R. (2005). An Investigation of Rational Bubbles: Case Study of Iran (1963- 2003). Master's thesis, Faculty of Economics and Management, Mazandaran University (In Persian).
-   Bahrami J. & Marovate H. (2013). Modeling Booms and Busts in Tehran housing market considering social dynamics. Quarterly Journal of Economics Research and Policies, 21(66), 143-168 (In Persian).
-   Blanchard, O. J. (1979). Speculative Bubbles, Crashes and Rational Expectations. Economics Letters, 3(4), 387-389.‏
-   Borrill, P. L., & Tesfatsion, L. (2011). 11 Agent-based modeling: the right mathematics for the social sciences?. The Elgar Companion to Recent Economic Methodology, 228.‏
-   Burnside, C., Eichenbaum, M., & Rebelo, S. (2016). Understanding Booms and Busts in Housing Markets. Journal of Political Economy, 124(4), 1088-1147.‏
-   Campbell, J. Y., & Shiller, R. J. (1987). Cointegration and Tests of Present Value Models. Journal of political economy, 95(5), 1062-1088..
-   Daniel, K., Hirshleifer, D., & Subrahmanyam, A. (1998). Investor Psychology and Security Market Under‐and Overreactions. The Journal of Finance, 53(6), 1839-1885.‏
-   Davoody, P., & Hadian, M. (2011). Seperation of Markets and Financial Crisis: Case Study of Iran: Journal of Economics and Modeling, 1(4), 1-21.
-   Diba, B. T., & Grossman, H. I. (1988). Explosive Rational Bubbles in Stock Prices?. The American Economic Review, 78(3), 520-530.‏
-   Dieci, R., & Westerhoff, F. (2012). A Simple Model of a Speculative Housing Market. Journal of Evolutionary Economics, 22(2), 303-329.‏
-   Dosi, G., & Staccioli, J. (2015). Bubble-and-bust Dynamics under Walrasian Asset Pricing and Heterogeneous Traders. Working paper.‏
-   Duffy, J., & Ünver, M. U. (2006). Asset Price Bubbles and Crashes with Near-Zero-Intelligence Traders. Economic Theory, 27(3), 537-563.‏
-   Fadaei Nejad M. (2013). Market Reaction to Seasonal Profit Declarations in Tehran Stock Exchange. Accounting and Finance Researches, 4,71-90 (In Persian).
-   Friedman, M. (1953). The Methodology of Positive Economics, University of Chicago Press.‏
-   Garber, P. M. (2001). Famous First Bubbles: The Fundamentals of Early Manias. MIT Press.‏
-   Goldari A.(2006). Investigating the Presence of Price Bubbles in Tehran Stock Exchange during Recent Years (2004-2005), Master's thesis, Tarbiat Modarres University (In Persian).
-   Guerini, M., & Moneta, A. (2017). A Method for Agent-Based Models Validation. Journal of Economic Dynamics and Control.‏
-   Gürkaynak, R. S. (2008). Econometric Tests of Asset Price Bubbles: Taking Stock. Journal of Economic Surveys, 22(1), 166-186.
-   Holland, J. H. (2014), Complexity: A Very Short Introduction. OUP Oxford.‏
-   Jiang, Z. Q., Zhou, W. X., Sornette, D., Woodard, R., Bastiaensen, K., & Cauwels, P. (2010). Bubble Diagnosis and Prediction of the 2005–2007 and 2008–2009 Chinese Stock Market Bubbles. Journal of Economic Behavior & Organization, 74(3), 149-162.‏
-   Koustas, Z., & Serletis, A. (2005). Rational Bubbles or Persistent Deviations from Market Fundamentals?. Journal of Banking & Finance, 29(10), 2523-2539.‏
-   Lamperti, F. (2016). Empirical Validation of Simulated Models Through the GSL-div: An Illustrative Application, LEM working paper series.
-   May, R. M., & Anderson, R. M. (1979). Population Biology of Infectious Diseases: Part II. Nature, 280(5722), 455-461.‏
-   Mir Shamsi Arash. (1999). Rational Bubbles in Tehran Stock Exchange, Master's Theses, Shahid Beheshti University, Faculty of Economic Sciences (In Persian).
-   Modalet k. (2002). Investigating the Price Bubble in Tehran Stock Exchange in Recent Years, Central Bank Report, 2002 (In Persian).
-   Morovat H., Ghasemi A. & Hakami H. (2016). A Simple Model for Tehran Stock Exchange Price Index Dynamics. Quarterly Journal of Economic Modeling Researches, 6 (23), 18-43.
-   Muth, J. F. (1961). Rational Expectations and the Theory of Price Movements. Econometrica: Journal of the Econometric Society, 315-335.‏
-   NikBakht M. R. & Moradi M. (2005). An Investigation of Over-Reaction in Individual Traders in Tehran Stock Exchang. Accounting and Auditing Reviews, 40, 97-129 (In Persian).
-   Palmer, R. G., Arthur, W. B., Holland, J. H., LeBaron, B., & Tayler, P. (1994). Artificial Economic Life: A Simple Model of a Stock Market. Physica D: Nonlinear Phenomena, 75(1-3), 264-274.‏‏
-   Pouyanfar A., Raei R., & Mohammadi Sh. (2009). How Prices Are Formed in Tehran Stock Exchange? A  Micro-Structure Approach, Quarterly Journal of Accounting and Auditing Reviews , 16, 21-38  (In Persian).
-   Samadi S., Nasrollahi Z. & Zahed A. (2007). Efficiency and Price Bubbles Test in Tehran Stock Exchange using the Filter rule and CAPM, Journal of Economic Reviews, 4, 91-113 (In Persian).
-   Samadi S., Vaez M. & Ghasemi M. (2010). Behavioral Analysis of Price Bubble Formation in the Capital Market (Case Study of Tehran Stock Exchange, 1997-2008), Journal of Economic Research, 4, 273-297 (In Persian).
-   Semet, Y., Gelly, S., Schoenauer, M., & Sebag, M. (2005). Artificial Agents and Speculative Bubbles. arXiv preprint cs/0511093.‏
-   Siettos, C. I., & Russo, L. (2013). Mathematical Modeling of Infectious Disease Dynamics. Virulence, 4(4), 295-306.‏
-   Smith, A. (2014). Infection Transmission During Air Travel. Clinical Correlations The NYU Langone Online Journal of Medicine.‏
-   VakiliFard H. R., Sa'idi A. and Eftekhari A. (2013). On the Reaction to Profit Coefficient in Tehran Stock Exchange. Financial Knowledge Of Securities Analysis, 18, 115-123 (In Persian).
-   West, K. D. (1988). Dividend Innovations and Stock Price Volatility. Econometrica: Journal of the Econometric Society, 37-61.‏
-   Wilensky, U., & Rand, W. (2015), An Introduction to Agent-Based Modeling: Modeling Natural, Social, and Engineered Complex Systems with NetLogo, MIT Press.