ARE INVESTORS MORE HOMO SAPIENS RATHER THAN HOMO ECONOMICUS: A BEHAVIORIST APPROACH TO FINANCIAL CRISIS

Yıl 2013, Cilt: 5 Sayı: 1, 168 - 179, 01.06.2013

Güngör Turan Pranvera Latifi

Öz

With the recent financial crisis, the debate of the validity of the efficient market
hypothesis has been raised once again, since the stock market crash of 1987. This
investment theory in a simple way states that financial markets are efficient and
make a rational allocation of resources because all of the available information is
reflected into prices. However, as many economists recently claimed, this
financial crisis has considerably disproved the theory of market efficiency; indeed
the new science of behavioral finance has proved to be true.
The aim of this paper is to analyze from a behavioral approach the recent financial
crisis. Are financial markets’ participants rational? What is the role of their animal
spirit in bubbles and bursts? Do the greed, optimism, confidence and other related
sentiments dominate the homo economicus? Reviewing literature and discussing
arguments of prominent economists and behaviorists such as Fama, Thaler and
Shiller, we provide a simplified human story of financial crisis beyond ARMs,
SIVs, CDOs, CDSs and the like.

Anahtar Kelimeler

Financial crisis, Information Market Efficiency, Behavioral Finance

Kaynakça

• Heffernan. Sh., (2005), “Modern Banking”, John Wiley & Sons Ltd., ISBN 0-470-09500-8
• Keynes, J.M., (1936), reprinted in 1967, “The general theory of Employment, Interest and Money”, London, McMillan
• McDonald, L. (2009), "A Colossal Failure of Common Sense”, Ebury Publishing A Random House Group Company, ISBN 9780091936150
• Mousavi, Shabnam and Shefrin, (2010), “Reckless Endangerment: How outsized Ambition, Greed and Corruption led to Economic Armageddon”, New York: Times Books, Henry Holt.
• Shiller, R. (2000), “Irrational Exuberance”, Princeton University Press, 41 William Street, Princeton
• Abreu, D., Brunnermeier, M., (2003), “Bubbles and Crashes”, Econometrica, VOl.71, No.1, pp.173-204
• Bali, S., (2012), “Behavior of individuals and institutions in relation to finance and accounting”, The Journal of International Social Research, Volume 5, Issue 20, ISSN: 1307-9581
• Ball R., (2009) “The global financial crisis and the efficient market hypothesis: What have we learned?”
• Journal of Applied Corporate Finance, Volume 21, No.4, pp. 8-16
• Banerjee, A., (1992), “A simple model of herd behaviour”, The Quarterly Journal of Economics, Vol.107, No.3, pp.797-817
• Barberis, N., Shleifer, A., Vishney, R.,(1998), “A Model of Investor Sentiment”, Journal of Financial Economics 49, pp.307-343
• Debondt, W., Thaler, R., (1985), “Does the stock market overreact?” The Journal of Finance, Vol.40, No.3
• Dimnson E., Mussavian, M. (2000), “A brief History of market efficiency”, The Current State of Business
• Disciplines. Vol.3, 959-970, Spellbound Publications Fama, E. (1965), “The behavior of stock market prices”, Journal of Business, Vol.38.no.1, pp. 34-105
• Garber, P., (1990), “Famous first bubbles”, The Journal of Economic Perspectives, Vol.4, No.2, pp. 35-54
• Jain, V., (2012), “An insight into behavioral finance models, efficient market hypothesis and its anomalies”,
• Research world-Journal of Arts, Science and Commerce, E-ISSN: 2220-4686
• Malkiel, B., (2003), “The efficient market hypothesis and its critics”, Journal of Economic Perspectives- Volume 17, Nr.1, pages 59-82
• Shiller, R., (2003), “From Efficient Market Theory to Behavioral Finance”, Journal of Economic
• Perspectives, Vol.17, No.1, pp.83-104
• Statman, M., (2008), “What is Behavioral Finance”, Handbook of Finance. Vol. II, Chap.9, pp.79-84, John Wiley & Sons Inc.
• Statman, M., (2011), “Efficient Markets in Crisis”, Journal of Investment Management”, Vol.9, No.2, pp.4
• Swedberg, R., (2010), “The structure of Confidence and the Collapse of Lehman Brothers”, Markets on
• Trial: The Economic Sociology of Organizations, Volume 30A, pages 71-114
• Szyszka, A., “Behavioural Anatomy of Financial Crisis”, Journal of CENTRUM Cathedra, Poznan University of Economics, Poland. Shiller, R., (2003), “From efficient Markets Theory to Behavioral Finance”, Journal of Economic
• Perspectives-Volume 17, Number 1, Pg.83-104
• Thaler, R., (2000), “From homo economicus to homo sapiens”, Journal of Economic Perspectives, Vol.14, Nr.1, pp.133–141
• Baily, M., Litan, R., Johnson, M.(2008),“The origins of the financial crisis”, Fixing finance series, Paper3
• Barberis, N., (2011), “Psychology and the financial crisis of 2007-2008”, Yale School of Management,
• Financial Innovation and Crisis, MIT Press Bikhchandani, S., Sharma, S.,(2000), “Herd behavior in financial markets: A review”, IMF Working Paper, IMF Institute
• Boezio, N. (2009), “Taking Stock: Is the efficient market hypothesis in trouble?” Risks and Rewards, Issue , pp.4-8
• Courtois, R. (2009), “The price is right? Has the financial crisis provided a fatal blow to the efficient market hypothesis?” Region Focus
• Dainanu, D. (2008), “What this financial crisis tells us”, Review of Economics and Business Studies, Issue: , pp.9-15
• Fama, E. (1965), “Random Walk in Stock-Market Prices”, Graduate School of Business, University of Chicago
• Fama, E. (1997), “Market Efficiency, long-term returns, and behavioural finance”, Graduate School of
• Business University of Chicago Kamalodin, Sh., (2011), “Asset bubbles, financial crises and the role of human behaviour”, Rabobank
• Economic Research Department Malkiel, B. (2003), “The Efficient Market Hypothesis and its critics”, Princeton University, CEPS Working Paper No.91
• Marshall, J. (2009), “The financial crisis in U.S.; key events, causes and responses”, House of Commons
• Library, Research Paper 09/34 Shefrin, H., Statman, M., (2011), “Behavioral Finance in the Financial Crisis: Market Efficiency, Minsky and Keynes”, Santa Clara University
• Shefrin, H.,(2009), “How psychological pitfalls generated the global financial crisis”, Santa Clara University
• Shiller, R., (2001), “Bubbles, Human Judgment and Expert Opinion”, Cowless Foundation Discussion Paper
• No.3, Cowless Foundation for Research in Economics, Yale University Shiller, R. (1999), “Human Behavior and the Efficiency of the Financial System”, Cowles Foundation, Paper No. 1025