Effect of the anchoring and adjustment heuristic and optimism bias in stock market forecasts.

Abstract

Stock market forecasting is an important and challenging process that influences investment decisions. This paper presents an experimental design that aims to measure the influence of the anchoring and adjustment heuristic and optimism bias in these forecasts. The study was conducted using information from the S&P MILA Pacific Alliance Select financial index; this was presented to 670 students from the cities of Concepción (Chile), Cali (Colombia), and Lima (Peru). Data was collected and presented through an instrument that asked participants to make a forecast judgment of the said financial index, based on the presented graphics, representing a year, a month, a week, and the last closing value of the index. Thus, it was possible to measure the influence of the anchor and adjustment heuristic in order to establish whether the presence of an initial value affected the financial forecast. Similarly, the study sought to determine whether the judgment issued was biased toward an optimistic or pessimistic position, thereby proving the presence of an error or expectation bias, known as optimism bias. The results were analyzed using the least squares method, and the data panel confirmed that the anchoring and adjustment heuristic influences the forecast of the financial index used in the study. Similarly, the presence of optimism bias in the cognitive process of forecasting in finance was inferred.

Keywords:

Financial forecast Optimism bias Anchor and adjustment heuristic Judgment Behavioral finance

References

Aguiar, F. (2004). Teoría de la decisión e incertidumbre: modelos normativos y descriptivos. Empiria: Revista de Metodología de Ciencias Sociales, (8), 139-160. https://doi.org//10.5944/empiria.8.2004.982

Amir, E., & Ganzach, Y. (1998). Overreaction and underreaction in analysts' forecasts. Journal of Economic Behavior & Organization, 37(3), 333-347. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.1024.5590&rep=rep1&type=pdf

Ariely, D., Loewenstein, G., & Prelec, D. (2003). «Coherent Arbitrariness*: Stable Demand Curves Without Stable Preferences. The Quarterly Journal of Economics, 118(1), 73-106. https://doi.org/10.1162/00335530360535153

Armor, D. A., & Taylor, S. E. (2002). When predictions fail: The dilemma of unrealistic optimism. In Gilovich, T, Griffin, D. W., & Kahneman, D. (eds.). Heuristics and biases: The psychology of intuitive judgment. (pp. 334-347). New York: Cambridge University Press. https://doi.org//10.1017/CBO9780511808098.021

Barber, B. M., & Odean, T (2001). Boys will be boys: Gender, overconfidence, and common stock investment. Quarterly Journal of Economics, JJ6(1), 261-292. http://dx.doi.org/10.2139/ssrn.139415

Barberis, N., & Thaler, R. (2003). A survey of behavioral finance. Handbook of the Economic of Finance, 1052-1121. http://houdekpetr.cz/!data/public_html/papers/economics_psychology/Barberis%20Thaler%202003.pdf

Ben-David, I., & Hirshleifer, D. (2012). Are investors really reluctant to realize their losses? Trading responses to past returns and the disposition effect. Review of Financial Studies. 25(8), 2485-2532. https://doi.org/10.1093/rfs/hhs077

Blankenship, K. L., Wegener, D. T, Petty, R. E., Detweiler-Bedell, B., & Macy, C. L. (2008). Elaboration and consequences of anchored estimates: An attitudinal perspective on numerical anchoring. Journal of Experimental Social Psychology, 44(6), 1465-1476. https://doi.org/10.10Wj.jesp.2008.07.005

Buehler, R., Griffin, D., & Ross, M. (1994). Exploring the «planning fallacy»: Why people underestimate their task completion times. Journal of Personality and Social Psychology, 67(3), 366-381. https://doi.org/10.1037/0022-3514.67.3.366

Cadet, B., & Chasseigne, G. (2009). Psychologie du jugement et de la decision: Des modèles aux applications. (A. Editore, Ed.) (1st ed). Paris: De Boeck Universite.

Campbell, S. D., & Sharpe, S. A. (2009). Anchoring bias in consensus forecasts and its effect on market prices. Journal of Financial and Quantitative Analysis, 44(2), 369-390. https://doi.org/10.1017/S0022109009090127

Caputo, A. (2014). Relevant information, personality traits and anchoring effect. International Journal of Management and Decision Making, 13(1), 62-76. https://doi.org/10.1504/ijmdm.2014.058470

Cen, L., Hilary, G., & Wei, K. C. J. (2013). The role of anchoring bias in the equity market: Evidence from analysts' earnings forecasts and stock returns. Journal of Financial and Quantitative Analysis, 48(1), 47-76. https://doi.org/10.1017/S002210901200060

Chambers, J. R., & Windschitl, P. D. (2004). Biases in Social Comparative Judgments: The Role of Nonmotivated Factors in Above-Average and Comparative-Optimism Effects. Psychological Bulletin, 130(5), 813-838. https://doi.org/10.1037/0033-2909.130.5.813

Chang, E. C., Lin, T C., Luo, Y., & Ren, J. (2019). Ex-day returns of stock distributions: An anchoring explanation. Management Science. https://doi.org/10.1287/mnsc.2017.2843

Chapman, G. B., & Johnson, E. J. (1999). Anchoring, activation, and the construction of values. Organizational Behavior and Human Decision Processes, 79(2), 115-153. https://doi.org/10.1006/obhd.1999.2841

Chapman, G. B., & Johnson, E. J. (2002). Incorporating the Irrelevant: Anchors in Judgments of Belief and Value. In Gilovich, T., Griffin, D. W., & Kahneman, D. (eds.). Heuristics and Biases: The Psychology of Intuitive Judgment (pp. 120-138). New York: Cambridge University Press. https://doi.org/dx.doi.org/10.1017/CBO9780511808098.008

Cowles, A., & Jones, H. E. (1937). Some A Posteriori Probabilities in Stock Market Action. Econometrica, 5(3), 280-294. https://doi.org/10.2307/1905515

Daniel, K., Hirshleifer, D., & Teoh, S. H. (2002). Investor psychology in capital markets: evidence and policy implication. Journal of Monetary Economics, 49(1), 139-209. https://doi.org/10.1016/S0304-3932(01)0001-5

De Bondt, W. F. M., & Thaler, R. (1985). Does the Stock Market Overreact? Journal of Finance, 40(3), 793-805. https://doi.org/10.1111/j.1540-6261.1985.tb05004.x

Duclos, R. (2014). The psychology of investment "https://doi.org/10.1016/j.jcps.2014.11.005">https://doi.org/10.1016/j.jcps.2014.11.005

Ductor, L., & Leiva-Leon, D. (2016). Dynamics of global business cycle interdependence. Journal of International Economics, 102, 110-127. https://doi.org/10.1016Zj.jinteco.2016.07.003

Einhorn, H. J., & Hogarth, R. M. (1981). Behavioral Decision Theory: Processed ofJudgment and Choice. Annual Review of Psychology, 32, 53-88. https://doi.org/10.1146/annurev.ps.32.020181.000413

Englich, B., & Soder, K. (2009). Moody experts—How mood and expertise influence judgmental anchoring. Judgment and Decision Making, 4(1), 41-50. https://psycnet.apa.org/record/2009-02933-004

Epley, N., & Gilovich, T (2001). Putting adjustment back in the anchoring and adjustment heuristic: Differential Processing of Self-Generated and Experimenter-Provided Anchors. Psychological Science, 12(5), 391-396. https://doi.org/10.1111/1467-9280.00372

Epley, N., & Gilovich, T. (2006). The Anchoring-and- Adjustment Heuristic Why the Adjustments. Psychological Science, 17(4), 311-318. https://doi.org/10.1111/j.1467-9280.2006.01704.x

Fama, E. (1997). Market Efficiency, Long-Term Returns, and Behavioral Finance. Journal of Financial Economics, 49(3), 283-306. https://pdfs.semanticscholar.org/0187/0cadeddf6c98ece3b878ce168c86636a5c4b.pdf

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

Festinger, L. (1957). A Theory of Cognitive Dissonance. Stanford University Press.

Fisher, K. L., & Statman, M. (2000). Cognitive Biases in Market Forecasts. The Journal of Portfolio Management, 27(1), 72-81. https://doi.org/10.3905/jpm.2000.319785

Forbes, W., Hudson, R., Skerratt, L., & Soufian, M. (2015). Which heuristics can aid financial-decision-making? International Review of Financial Analysis, 42, 199-210.

Galinsky, A. D., & Mussweiler, T. (2001). First offers as anchors: The role of perspective-taking and negotiator focus. Journal of Personality and Social Psychology, 81(4), 657-669. https://doi.org/10.1037/0022-3514.81.4.657

George, T J., & Hwang, C. Y. (2004). The 52-week high and momentum investing. Journal of Finance, 59(5), 2145-2176. https://doi.org/10.1111/j.1540-6261.2004.00695.x

Gigerenzer, G., & Gaissmaier, W. (2011). Heuristic decision making. Annual Review of Psychology, 62 (1), 451-482. https://doi.org/10.1146/annurev-psych-120709-145346

Giordani, P, & Sõderlind, P (2006). Is there evidence of pessimism and doubt in subjective distributions? Implications for the equity premium puzzle. Journal of Economic Dynamics and Control, 30(6), 1027-1043. https://doi.org/10.1016/j.jedc.2005.05.001

Griffin, D., & Tversky, A. (1992). The weighing of evidence and the determinats of confidence. Cognitive Psychology, 24, 411-435. https://doi.org/10.1016/0010-0285(92)90013-R

Hastie, R., & Dawes, R. M. (2010). Rational Choice in an Uncertain World: The Psychology of Judgement and Decision Making. SAGE Publications.

Helweg-Larsen, M., & Shepperd, J. A. (2001). Do Moderators of the Optimistic Bias Affect Personal or Target Risk Estimates? A Review of the Literature. Personality and Social Psychology Review, 5(1), 74-95. https://doi.org/10.1207/S15327957PSPR0501_5

Hilary, G., & Hsu, C. (2011). Endogenous overconfidence in managerial forecasts. Journal of Accounting and Economics, 51 (3), 300-313. https://doi.org/10.10Wj.jacceco.2011.01.002

Hirshleifer, D. (2015). Behavioral Finance. Annual Review of Financial Economics, 7(1), 133-159. https://doi.org/10.1146/annurev-financial-092214-043752

Hysenbelli, D., Rubaltelli, E., & Rumiati, R. (2013). Others' opinions count, but not all of them: anchoring to ingroup versus outgroup members' behavior in charitable giving. Judgment and Decision Making, 8(6), 678-690. http://journal.sjdm.org/12/121219/jdm121219.pdf

Jefferson, A., Bortolotti, L., & Kuzmanovic, B. (2017). What is unrealistic optimism? Consciousness and Cognition, 50, 3-11. https://doi.org/10.1016/jxoncog.2016.10.005

Kahneman, D. (2003). Maps of Bounded Rationality: Psychology for Behavioral Economics. American Economic Review, 93(5), 1449-1475. https://doi.org/10.1257/000282803322655392

Kahneman, D. (2011). Thinking, Fast and Slow. New York: Farrar, Straus and Giroux.

Kahneman, D., Knetsch, J. L., & Thaler, R. H. (1991). Anomalies: The endowment effect, loss aversion, and status quo bias. The Journal of Economic Perspectives, 5(1), 193-206. http://pubs.aeaweb.org/doi/10.1257/jep.5.1.193.

Kahneman, D., & Riepe, M. W. (1998). Aspects of Investor Psychology. The Journal of Porfolio Management, 24(4), 52-65. https://doi.org/10.3905/jpm.1998.409643

Kahneman, D., Slovic, IP, & Tversky, A. (1982). Judgement Under Uncertainty: Heuristics and Biases. Cambridge University Press.

Kahneman, D., & Tversky, A. (1973). On the psychology of prediction. Psychological Review, 80(4), 237-251. https://doi.org/10.1037/h0034747

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

Kaustia, M., Alho, E., & Puttonen, V. (2008). How Much Does Expertise Reduce Behavioral Biases? The Case of Anchoring Effects in Stock Return Estimates. Financial Management, 37(3), 391-412. https://doi.org/10.1111/j.1755-053X.2008.00018.x

Kendall, M. G., & Hill, A. B. (1953). The analysis of economic time-series-Part I: Prices. Journal of the Royal Statistical Society Series A, 116(1), 11. https://doi.org/10.2307/2980947

Kinari, Y. (2016). Properties of expectation biases: Optimism and overconfidence. Journal of Behavioral and Experimental Finance, 10(1), 32-49. https://doi.org/10.1016/j.jbef.2016.02.003

Krch, D. (2011). Cognitive Processing. In J. S. Kreutzer, J. DeLuca, & B. Caplan (eds.). Encyclopedia of Clinical Neuropsychology. (p. 627). New York, NY: Springer New York.

Langer, E. J. (1975). The illusion of control. Journal of Personality and Social Psychology, 32(2), 311-328. https://doi.org/10.1037/0022-3514.32.2.311

Levin, I. P, Schneider, S. L., & Gaeth, G. J. (1998). All Frames Are Not Created Equal: A Typology and Critical Analysis of Framing Effects. Organizational Behavior and Human Decision Processes, 76(2), 149-188. https://doi.org/10.1006/obhd.1998.2804

Liao, L.-C., Chou, R. Y., & Chiu, B. (2013). Anchoring effect on foreign institutional investors' momentum trading https://doi.org/10.1016/j.najef.2013.07.001

Locke, J. (1796). An Essay Concerning Human Understanding. The Philosophical Review. 3(5), 601-605. https://openpublishing.psu.edu/locke/bib/ch0e.html

Lovallo, D., & Kahneman, D. (2003). Delusions of Success: How Optimism Undermines Executives' Decisions. Harvard Business Review. 81 (7), 56-63, 117. https://www.ncbi.nlm.nih.gov/pubmed/12858711

Lucas, R. E. J. (1978). Asset Prices in an Exchange Economy. Econometrica, 46(6), 1429-1445. http://www.its.caltech.edu/~pbs/expfinance/Readings/Lucas1978.pdf

Lucey, M. E., & O'Connor, F. A. (2016). Mind the gap: Psychological barriers in gold and silver prices. Finance Research Letters, 17, 135-140. https://doi.org/10.1016/jfrl.2016.03.009

March, J. G. (1978). Bounded Rationality, Ambiguity, and the Engineering of Choice. The Bell Journal of Economics, 9(2), 587. https://www.jstor.org/stable/3003600

Marsden, A., Veeraraghavan, M., & Ye, M. (2008). Heuristics of Representativeness, Anchoring and Adjustment, and Leniency: Impact on Earnings' Forecasts by Australian Analysts. Quarterly Journal of Finance & Accounting, 47(2), 83-102. https://doi.org/https://doi.org/10.2139/ssrn.996514

McElroy, T., & Dowd, K. (2007). Susceptibility to anchoring effects: How openness-to-experience influences responses to anchoring cues. Judgment and Decision Making, 2(1), 48-53. http://journal.sjdm.org/jdm06143.pdf

Mintzberg, H., Raisinghani, D., & Theoret, A. (1976). The Structure of «Unstructured» Decision Processes. Administrative Science Quarterly, 21 (2), 246. https://doi.org/10.2307/2392045

Montier, J. (2013). Behavioural Investing: A Practitioner's Guide to Applying Behavioural Finance. Chichester, England: John Wiley & Sons.

Mullainathan, S., & Thaler, R. (2000). Behavioral Economics. the National Bureau of Economic Research (Vol. 3). Cambridge, MA. https://doi.org/10.3386/w7948

Mussweiler, T, Strack, F., & Pfeiffer, T (2000). Overcoming the Inevitable Anchoring Effect: Considering the Opposite Compensates for Selective Accessibility. Personality and Social Psychology Bulletin, 26(9), 1142-1150. https://doi.org/10.1177/01461672002611010

Newell, B. R., & Brõder, A. (2008). Cognitive processes, models and metaphors in decision research. Judgment and Decision Making, 3 (3), 195-204. http://journal.sjdm.org/bn1.pdf

Northcraft, G. B., & Neale, M. A. (1987). Experts, amateurs, and real estate: An anchoring-and-adjustment perspective on property pricing decisions. Organizational Behavior and Human Decision Processes, 39(1), 84-97. https://doi.org/10.1016/0749-5978(87)90046-X

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

Pachur, T, & Brõder, A. (2013). Judgment: a cognitive processing perspective. Wiley Interdisciplinary Reviews: Cognitive Science, 4(6), 665-681. https://doi.org/10.1002/wcs.1259

Plous, S. (1989). Thinking the Unthinkable: The Effects of Anchoring on Likelihood Estimates of Nuclear War. Journal of Applied Social Psychology, 19(1), 67-91. https://doi.org/10.1111/j.1559-1816.1989.tb01221.x

Pompian, M. M. (2012). Behavioral Finance and Wealth Management: How to Build Optimal Portfolios That Account for Investor Biases (2.a ed.). Chichester, England: John Wiley & Sons.

Puri, M., & Robinson, D. (2007). Optimism and economic choice. Journal of Financial Economics, 86(1), 71-99. https://doi.org/10.10Wj.jfineco.2006.09.003

Rau, R. (2011). Market Inefficiency. In Baker, H. K., & Nofsinger, J. R. (eds.). Behavioral Finance: Investors, Corporations, and Markets (pp. 331-349). Hoboken, New Jersey: John Wiley & Sons.

Ricciardi, V. (2008). The Psychology of Risk: The Behavioral Finance Perspective. In Fabozzi, F. J. (ed.). The Handbook of Finance. Vol. 2. Investment Management and Financial Management. (pp. 85-111). London: John Wiley & Sons.

Ricciardi, V., & Simon, H. K. (2000). What is Behavioral Finance? Business, Education & Technology Journal, 2(2), 1-9. https://ssrn.com/abstract=256754

Ritter, J. R. (2003). Behavioral finance. Pacific-Basin Finance Journal, 11 (4), 429-437. https://doi.org/10.1016/S0927-538X(03)00048-9

S&P Global. (2019). S&P MILA Indices Methodology. https://us.spindices.com/documents/methodologies/methodology-sp-mila-indices.pdf?force_download=true

Samuelson, W., & Zeckhauser, R. (1988). Status quo bias in decision making. Journal of Risk and Uncertainty, 1 (1), 7-59. https://doi.org/10.1007/BF00055564

Schwert, G. W. (2003). Anomalies and Market Efficiency. Handbook of the Economics of Finance, 1, 939-974. http://schwert.ssb.rochester.edu/hbfech15.pdf

Sharot, T (2011). The optimism bias. Current Biology, 21(23), R941-R945. https://doi.org/10.10Wj.cub.2011.10.030

Sharot, T, Riccardi, A. M., Raio, C. M., & Phelps, E. A. (2007). Neural mechanisms mediating optimism bias. Nature, 450(November), 102-105. https://www.ncbi.nlm.nih.gov/pubmed/17960136

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

Shepperd, J. A., Carroll, P, Grace, J., & Terry, M. (2002). Exploring the Causes of Comparative Optimism. Psychologica Belgica, 42, 65-98. https://psycnet.apa.org/record/2002-06881-007

Shiller, R. J. (2003). From Efficient Markets Theory to Behavioral Finance The 1980s and Excess Volatility. Journal of Economic Perspectives, 17(1), 83-104. https://doi.org/10.1257/089533003321164967

Shin, H., & Park, S. (2018). Do foreign investors mitigate anchoring bias in stock market? Evidence based on post-earnings announcement drift. Pacific-Basin Finance Journal, 48 (December 2016), 224-240. https://doi.org/10.1016/j.pacfin.2018.02.008

Simon, H. A. (1955). A Behavioral Model of Rational Choice. The Quarterly Journal of Economics, 69(1), 99. https://doi.org/10.2307/1884852

Simon, H. A. (1957). Models of man; social and rational. Operations Research (Vol. 5). Oxford, England: Wiley.

Simon, H. A. (1972). Theories of Bounded Rationality. In Decision and Organization: A volume in honor of Jacob Marschak (pp. 161-176). North-Holland Publishing Company.

Slovic, P, & Lichtenstein, S. (1971). Comparison of Bayesian and regression approaches to the study of information processing in judgment. Organizational Behavior and Human Performance, 6(6), 649-744. https://doi.org/10.1016/0030-5073(71)90033-X

Slovic, Paul. (1972). Psychological Study of Human Judgment: Implications for Investment Decision Making. Journal of Finance, 27(4), 779-799. https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1540-6261.1972.tb01311.x

Stanêk, R. (2017). Home bias in sport betting : Evidence from Czech betting market. Judgment and Decision Making, 12(2), 168-172. http://journal.sjdm.org/16/16824/jdm16824.html7

Thaler, R. (1980). Toward a positive theory of consumer choice. Journal of Economic Behavior and Organization, 1 (1), 39-60. https://doi.org/10.1016/0167-2681(80)90051-7

Thaler, R., & Sunstein, C. (2008). Nudge: Improving Decisions about Health, Wealth, and Happiness (revised). Penguin UK.

Thompson, S. C., Armstrong, W., & Thomas, C. (1998). Illusions of Control, Underestimations, and Accuracy: A Control Heuristic Explanation. Psychological Bulletin, 123(2), 143-161. https://doi.org/10.1037/0033-2909.123.2.143

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

Tversky, A., & Kahneman, D. (1992). Advances in Prospect Theory: Cumulative Representation of Uncertainty. Journal of Risk & Uncertainty, 5(4), 297-323. https://link.springer.com/article/10.1007/BF00122574

Von Neumann, J., & Morgenstern, O. (1944). Theory of Games and Economic Behavior. Princeton University Press.

Wansink, B., Kent, R. J., & Hoch, S. J. (1998). An Anchoring and Adjustment Model of Purchase Quantity Decisions. Journal of Marketing Research, 35(1), 71. https://doi.org/10.2307/3151931

Weinstein, N. D. (1980). Unrealistic optimism about future life events. Journal of Personality and Social Psychology, 39(5), 806-820. https://doi.org/10.1037/0022-3514.39.5.806

Westerhoff, F. (2003). Anchoring and Psychological Barriers in Foreign Exchange Markets. Journal of Behavioral Finance, 4(2), 65-70. https://doi.org/10.1207/S15427579JPFM0402_03

Wilke, A., & Mata, R. (2012). Cognitive Bias. In Encyclopedia of human behavior (pp. 531-535). London: Academic Press.

Working, H. (1934). A Random-Difference Series for Use in the Analysis of Time Series. Journal of the American Statistical Association, 29(185), 11-24. https://www.tandfonline.com/doi/abs/10.1080/01621459.1934.10502683

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