Kriz ve Balon Dönemlerinde Rasyonel Yatırımcı Davranışı: Geleneksel ve Davranışsal Finans Perspektiflerinden Değerlendirme

Yazarlar

DOI:

https://doi.org/10.63556/tisej.2026.1842

Anahtar Kelimeler:

Yatırımcı Rasyonelliği- Davranışsal Finans- Finansal Kriz- Varlık Fiyat Balonları- Belirsizlik Altında Karar Alma

Özet

Bu çalışma kriz ve balon dönemlerinde rasyonel yatırımcı davranışında ortaya çıkan sapmaları geleneksel finans, davranışsal finans ve psikoloji literatürünü bütüncül bir çerçevede bir araya getirerek yeniden incelemektedir. Kriz ve balon dönemleri, bilişsel yükün arttığı yüksek belirsizlik dönemleri olarak tanımlanmaktadır. Bu dönemlerde rasyonaliteden sapmaların davranışsal altyapısı, piyasa koşulları ve risk unsurları üzerindeki etkisi tartışılmaktadır. Çalışma, yatırımcıların rasyonel davrandığı varsayımı ile şekillenen geleneksel finans teorilerinin önemini koruduğunu, ancak finansal piyasalarda alınan yatırım kararlarının çok daha karmaşık psikolojik faktörlerden etkilendiğini farklı bakış açıları ile değerlendirmektedir. Tarihsel süreçte ortaya çıkan kriz ve balon dönemlerinde rasyonel yatırımcı davranışından sapmalar ve bu sapmaların piyasalar üzerindeki etkileri araştırılmıştır. Geleneksel finans teorileri, yatırımcıların rasyonel, tutarlı ve fayda maksimizasyonuna dayalı kararlar aldığını varsaymaktadır. Davranışsal finans teorileri, yatırımcıların, sistematik bilişsel yanlılıklara, duygusal tepkilere ve sezgisel karar verme süreçlerine maruz kaldığını göstererek bu varsayımları kökten sorgulamaktadır. Psikoloji literatürüne göre finansal kararlar, bilişsel kestirmeler ve sistematik yanlılıklar içermektedir. Bu çerçevede çalışma, geleneksel finansın normatif rasyonellik modelleri ile davranışsal finansın betimleyici bulgularını, psikolojideki sınırlı rasyonalite, çift-süreçli düşünme, belirsizlik altında karar verme ve pişmanlık yaklaşımlarıyla bütünleştirerek yorumlamaktadır. Çalışma, yatırımcı davranışının yalnızca finansal modellere dayalı değil, bilişsel, duygusal ve sosyal değişimlerden etkilenen disiplinler arası bir olgu olduğunu ortaya koymaktadır.

Kaynaklar

Akyıldız, P. (2008). Tartışılan boyutlarıyla “homo economicus”. Süleyman Demirel Üniversitesi İktisadi ve İdari Bilimler Fakültesi Dergisi, 13(2), 29-40.

Baddeley, M. and McCombie, J. (2001). An Historical Perspective on Speculative Bubbles and Financial Crises: Tulipmania and the South Sea Bubble. In: Arestis, P., Baddeley, M., McCombie, J. (eds) What Global Economic Crisis?. Palgrave Macmillan, London. https://doi.org/10.1057/9780333992746_11

Baig, T. and Goldfajn, I. (1998). Financial Market Contagion in the Asian Crisis. IMF Working Paper No. WP/98/155. https://www.imf.org/external/pubs/ft/wp/wp98155.pdf.

Baker, M. and Wurgler, J. (2006). Investor Sentiment and the Cross-Section of Stock Returns. The Journal of Finance, 61(4), 1645-1680. https://doi.org/10.1111/j.1540-6261.2006.00885.x

Baltussen, G. (2009). Behavioral Finance: An Introduction. http://dx.doi.org/10.2139/ssrn.1488110

Bansal, T. (2020). Behavioral finance and COVID-19: Cognitive errors that determine the financial future. SSRN Electronic Journal. https://doi.org/10.2139/SSRN.3595749

Barber, B. M. and Odean, T. (2000). Trading is hazardous to your wealth: The common stock investment performance of individual investors. The Journal of Finance, 55(2), 773-806. http://dx.doi.org/10.2139/ssrn.219228

Barber, B. M. and Odean, T. (2001). Boys Will be Boys: Gender, Overconfidence, and Common Stock Investment. The Quarterly Journal of Economics, 116(1), 261–292. http://www.jstor.org/stable/2696449

Barberis, N. and Thaler, R. H. (2003). A survey of behavioral finance. In G. M. Constantinides, M. Harris, & R. M. Stulz (Eds.), Handbook of the economics of finance (Vol. 1, pp. 1053-1128). Elsevier. https://doi.org/10.2139/SSRN.327880

Benartzi, S. and Thaler, R. H. (1993). Myopic Loss Aversion and the Equity Premium Puzzle. NBER Working Paper No. w4369. https://ssrn.com/abstract=227015

Bensimhon, L. and Levy, A. (2010). The origin of stock-market crashes: Proposal for a mimetic model using behavioral assumptions and an analysis of legal mimicry. International Journal of Business, 15(3), 289-306.

Bikhchandani, S., Hirshleifer, D. and Welch, I. (1992). A Theory of Fads, Fashion, Custom, and Cultural Change as Informational Cascades. Journal of Political Economy, 100, 992-1026. https://doi.org/10.1086/261849

Black, F. (1972). Capital Market Equilibrium with Restricted Borrowing. The Journal of Business, 45(3), 444-455. https://www.jstor.org/stable/2351499

Bogdan, S., Suštar, N. and Draženović, B. O. (2022). Herding Behavior in Developed, Emerging, and Frontier European Stock Markets during COVID-19 Pandemic. Journal of Risk and Financial Management, 15(9), 400. https://doi.org/10.3390/jrfm15090400

Bruner, R. F. and Schill, M. J. (2020). Asset Price Bubbles. Darden Case No. UVA-F-1919, http://dx.doi.org/10.2139/ssrn.3682587

Carhart, M. M. (1997). On Persistence in Mutual Fund Performance. The Journal of Finance, 52(1), 57-82. https://doi.org/10.1111/j.1540-6261.1997.tb03808.x

Cevik, E., Altınkeski, B. K., Cevik, E. I. and Dibooglu, S. (2022). Investor sentiments and stock markets during the COVID-19 pandemic. Financial Innovation, 8, Article 69. https://doi.org/10.1186/s40854-022-00375-0

Dale, R. (2004). The first crash: Lessons from the South Sea Bubble. Princeton University Press. https://doi.org/10.2307/j.ctt6wpz4m

Dale, R., Johnson, J. E. V. and Tang, L. (2005). Financial markets can go mad: Evidence of irrational behaviour during the South Sea Bubble. Economic History Review, 58(2), 233-271. https://doi.org/10.1111/j.1468-0289.2005.00304.x

De Bondt, W. F. M. and Thaler, R. (1985). Does the Stock Market Overreact? The Journal of Finance, 40(3), 793–805. https://doi.org/10.2307/2327804

De Long, J. B. and Shleifer, A. (1991). The Stock Market Bubble of 1929: Evidence from Closed-End Mutual Funds. The Journal of Economic History, 51(3), 675–700. https://doi.org/10.1017/S0022050700039619

De Long, J. B., Shleifer, A., Summers, L. H. and Waldmann, R. J. (1990). Noise Trader Risk in Financial Markets. Journal of Political Economy, 98(4), 703–738. http://www.jstor.org/stable/2937765

Dwivedi, A. (2023). A qualitative research on the 1630s' tulip bubble 'tulipmania'. International Journal of Social Science and Economic Research, 8(8), 2478-2491. https://doi.org/10.46609/ijsser.2023.v08i08.028

Ellsberg, D. (1961) Risk, Ambiguity, and the Savage Axioms. Quarterly Journal of Economics, 75, 643-669. https://doi.org/10.2307/1884324

Fama, E. F. (1970). Efficient Capital Markets: A Review of Theory and Empirical Work. The Journal of Finance, 25(2), 383–417. https://doi.org/10.2307/2325486

Fama, E. F. and French, K. R. (1992). The Cross-Section of Expected Stock Returns. The Journal of Finance, 47(2), 427–465. https://doi.org/10.2307/2329112

Fama, E. F. and French, K. R. (1993). Common risk factors in the returns on stocks and bonds. Journal of Financial Economics, 33(1), 3-56. DOI: 10.1016/0304-405X(93)90023-5

Fama, E. F. and French, K. R. (2012). Size, value, and momentum in international stock returns. Journal of Financial Economics, 105(3), 457–472. https://doi.org/10.1016/j.jfineco.2012.05.01

Fama, E. F. and French, K. R. (2015). A five-factor asset pricing model. Journal of Financial Economics, 116(1), 1-22. https://doi.org/10.1016/j.jfineco.2014.10.010

Garber, P. M. (2000). Famous first bubbles: The fundamentals of early manias. MIT Press. ISBN: 9780262571531

Grossman, S. J. and Stiglitz, J. E. (1980). On the Impossibility of Informationally Efficient Markets. The American Economic Review, 70(3), 393–408. http://www.jstor.org/stable/1805228

Hayta, A. B. (2014). Bireysel yatırımcıların finansal risk algısına etki eden psikolojik önyargılar. Türkiye Sosyal Araştırmalar Dergisi, 183(183), 329-352. https://doi.org/10.20296/tsad.77127

Hoffmann, A. O. I., Post, T. and Pennings, J. M. E. (2013). Individual investor perceptions and behavior during the financial crisis. Journal of Banking & Finance, 37(1), 60–74. https://doi.org/10.1016/j.jbankfin.2012.08.007

Hwang, S. and Salmon, M. (2004). Market stress and herding. Journal of Empirical Finance, 11(4), 585–616. https://doi.org/10.1016/j.jempfin.2004.04.003

Jaber, F. H. (2025). Cognitive biases and behavioral patterns shaping investment decision-making. Academia Open, 10(2), https://doi.org/10.21070/acopen.10.2025.12142

Jegadeesh, N. and Titman, S. (1993). Returns to buying winners and selling losers: Implications for stock market efficiency. The Journal of Finance, 48(1), 65-91. https://doi.org/10.1111/j.1540-6261.1993.tb04702.x

Kabakcı, C. Ç. and Akkaya, G. C. (2020). Yatırımcı Duyarlılığı Endeksi İle BİST 100 Endeksi Arasındaki İlişkinin Araştırılması. Manisa Celal Bayar Üniversitesi Sosyal Bilimler Dergisi, 18 (4), 407-416. https://doi.org/10.18026/cbayarsos.799208

Kahneman, D. (2003). Maps of Bounded Rationality: Psychology for Behavioral Economics. The American Economic Review, 93(5), 1449–1475. http://www.jstor.org/stable/3132137

Kahneman, D. and Tversky, A. (1979). Prospect Theory: An Analysis of Decision under Risk. Econometrica, 47(2), 263–291. https://doi.org/10.2307/1914185

Kaizoji, T. and Miyano, M. (2019). Stock market crash of 2008: an empirical study of the deviation of share prices from company fundamentals. Applied Economics Letters, 26(5), 362–369. https://doi.org/10.1080/13504851.2018.1486004

Karakuş, T. F. (2022). Yatırımcı Davranışında Bilişsel Önyargılar ve Hevristikler. Toros Üniversitesi İİSBF Sosyal Bilimler Dergisi, 9(16), 57-70. https://doi.org/10.54709/iisbf.1135271

Lintner, J. (1965). The Valuation of Risk Assets and the Selection of Risky Investments in Stock Portfolios and Capital Budgets. The Review of Economics and Statistics, 47(1), 13–37. https://doi.org/10.2307/1924119

Lo, A.W. (2005). Reconciling efficient markets with behavioral finance: The adaptive markets hypothesis. Journal of Investment Consulting, 7(2), 21-44. https://ssrn.com/abstract=1702447

Loewenstein, G. F., Weber, E. U., Hsee, C. K. and Welch, N. (2001). Risk as feelings. Psychological Bulletin, 127(2), 267–286. https://doi.org/10.1037/0033-2909.127.2.267

Loomes, G. and Sugden, R. (1982). Regret Theory: An Alternative Theory of Rational Choice under Uncertainty. Economic Journal, 92, 805-824. https://doi.org/10.2307/2232669

Markowitz, H. (1952). Portfolio Selection. The Journal of Finance, 7(1), 77–91. https://doi.org/10.2307/2975974

McClure, J. and Thomas, D. (2017). Explaining the Timing of the Tulipmania Boom and Bust: Historical Context, Sequestered Capital, and Market Signals. Financial History Review, 24(2). http://dx.doi.org/10.2139/ssrn.2839534

McGrattan, E. R. and Prescott, E. C. (2001). The Stock Market Crash of 1929: Irving Fisher Was Right! NBER Working Paper No. 8622. https://doi.org/10.3386/w8622

Mehra, R. and Prescott, E. C. (1985). The equity premium: A puzzle. Journal of Monetary Economics, 15(2), 145-161. https://doi.org/10.1016/0304-3932(85)90061-3

Mossin, J. (1966). Equilibrium in a capital asset market. Econometrica, 34(4), 768-783. https://doi.org/10.2307/1910098

Naseem, S., Mohsin, M., Hui, W., Geng, L. and Penglai, K. (2021). The Investor Psychology and Stock Market Behavior During the Initial Era of COVID-19: A Study of China, Japan, and the United States. Frontiers in Psychology, 12, 626934. https://doi.org/10.3389/fpsyg.2021.626934

Odean, T. (1998). Are investors reluctant to realize their losses? The Journal of Finance, 53(5), 1775-1798. https://doi.org/10.1111/0022-1082.00072

Ormos, M. and Timotity, D. (2016). Market microstructure during financial crisis: Dynamics of informed and heuristic-driven trading. Finance Research Letters, 19, 60–66. https://doi.org/10.1016/j.frl.2016.06.003

Ross, S. A. (1976). The arbitrage theory of capital asset pricing. Journal of Economic Theory, 13(3), 341-360. https://doi.org/10.1016/0022-0531(76)90046-6

Schulmerich, M., Leporcher, YM. and Eu, CH. (2015). Explaining Stock Market Crashes: A Behavioral Finance Approach. In: Applied Asset and Risk Management. Management for Professionals. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-55444-5_5

Sharpe, W. F. (1964). Capital Asset Prices: A Theory of Market Equilibrium under Conditions of Risk. The Journal of Finance, 19(3), 425–442. https://doi.org/10.2307/2977928

Shear, F., Ashraf, B. N. and Sadaqat, M. (2021). Are Investors’ Attention and Uncertainty Aversion the Risk Factors for Stock Markets? International Evidence from the COVID-19 Crisis. Risks, 9(1), 2. https://doi.org/10.3390/risks9010002

Shefrin, H. and Statman, M. (1985). The Disposition to Sell Winners Too Early and Ride Losers Too Long: Theory and Evidence. The Journal of Finance, 40(3), 777–790. https://doi.org/10.2307/2327802

Shefrin, H. and Statman, M. (2000). Behavioral Portfolio Theory. The Journal of Financial and Quantitative Analysis, 35(2), 127–151. https://doi.org/10.2307/2676187

Shiller, R. J. (1981). Do Stock Prices Move Too Much to be Justified by Subsequent Changes in Dividends? The American Economic Review, 71(3), 421–436. http://www.jstor.org/stable/1802789

Shiller, R. J. (1987). Investor Behavior in the October 1987 Stock Market Crash: Survey Evidence. NBER Working Paper No. 2446. https://doi.org/10.3386/w2446

Shiller, R. J. (2005). Irrational Exuberance: (Second Edition). Princeton University Press. http://www.jstor.org/stable/j.ctt7st4s

Shiller, R. J., Kon-Ya, F. and Tsutsui, Y. (1988). Investor Behavior in the October 1987 Stock Market Crash: The Case of Japan. NBER Working Paper No. 2684. https://doi.org/10.3386/w2684

Shiller, R.J. (1984) Stock Prices and Social Dynamics. Brookings Papers on Economic Activity, 1984, 457-498. http://dx.doi.org/10.2307/2534436

Shiller, R.J. (1999) Human Behavior and the Efficiency of the Financial System. In: Taylor, J.B. and Woodford, M., Eds., Handbook of Macroeconomics, Volume 1, Chapter 20, Elsevier, Amsterdam, 1305-1340. https://doi.org/10.1016/S1574-0048(99)10033-8

Shleifer, A. and Vishny, R. W. (1997). A Survey of Corporate Governance. The Journal of Finance, 52(2), 737–783. https://doi.org/10.1111/j.1540-6261.1997.tb04820.x

Simon, H. A. (1955). A Behavioral Model of Rational Choice. The Quarterly Journal of Economics, 69, 99-118. https://doi.org/10.2307/1884852

Simon, H. A. (1956). Rational choice and the structure of the environment. Psychological Review, 63(2), 129–138. https://doi.org/10.1037/h0042769

Szyszka, A. (2013). Behavioral finance and capital markets: How psychology influences investors and corporations. Palgrave Macmillan. https://doi.org/10.1057/9781137366290

Teall, J. L. (2023). Financial Trading and Investing. Academic Press. ISBN: 9780323909556

Tekçe, B., Yılmaz, N. and Bildik, R. (2016). What Factors Affect Behavioral Biases? Evidence from Turkish Individual Stock Investors. Research in International Business and Finance, 37, 515–526. https://doi.org/10.1016/j.ribaf.2015.11.017

Thaler, R. (1985). Mental Accounting and Consumer Choice. Marketing Science, 4(3), 199–214. http://www.jstor.org/stable/183904

Tobin, J. (1958). Liquidity Preference as Behavior Towards Risk. The Review of Economic Studies, 25(2), 65-86. https://doi.org/10.2307/2296205

Tversky, A. and Kahneman, D. (1974). Judgment under uncertainty: Heuristics and biases. Science, 185(4157), 1124–1131. https://doi.org/10.1126/science.185.4157.1124

Tversky, A. and Kahneman, D. (1981). The framing of decisions and the psychology of choice. Science, 211(4481), 453–458. https://doi.org/10.1126/science.7455683

Valliere, D. and Peterson, R. (2004). Inflating the bubble: examining dot-com investor behaviour. Venture Capital, 6(1), 1–22. https://doi.org/10.1080/1369106032000152452

Von Neumann, J. and Morgenstern, O. (1944). Theory of games and economic behavior. Princeton University Press.

Wheale, P. R. and Amin, L. H. (2003). Bursting the dot.com "Bubble’: A Case Study in Investor Behaviour. Technology Analysis & Strategic Management, 15(1), 117–136. https://doi.org/10.1080/0953732032000046097

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Yayınlanmış

20-03-2026

Nasıl Atıf Yapılır

ÖZTÜRK, S. Çağatay. (2026). Kriz ve Balon Dönemlerinde Rasyonel Yatırımcı Davranışı: Geleneksel ve Davranışsal Finans Perspektiflerinden Değerlendirme. Üçüncü Sektör Sosyal Ekonomi Dergisi, 61(1), 1079–1098. https://doi.org/10.63556/tisej.2026.1842

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