Quantifying Cognitive Biases in Analyst Earnings Forecasts

This paper develops a formal model of analyst earnings forecasts that discriminates between rational behavior and that induced by cognitive biases. In the model, analysts are Bayesians who issue sequential forecasts that combine new information with the information contained in past forecasts. The model enables us to test for cognitive biases, and to quantify their magnitude. We estimate the model and find strong evidence that analysts are overconfident about the precision of their own information and also subject to cognitive dissonance bias, but they are able to make corrections for bias in the forecasts of others. We show that our measure of overconfidence varies with book-to-market ratio in a way consistent with the findings of Daniel and Titman [1999. Market efficiency in an irrational world. Financial Analysts’ Journal 55, 28–40]. We also demonstrate the existence of these biases in international data.

[1]  John C. Easterwood,et al.  Inefficiency in Analysts' Earnings Forecasts: Systematic Misreaction or Systematic Optimism? , 1999 .

[2]  Dan Givoly,et al.  Financial analysts' forecasts of earnings: A better surrogate for market expectations , 1982 .

[3]  Glenn Ellison,et al.  Risk Taking by Mutual Funds as a Response to Incentives , 1997, Journal of Political Economy.

[4]  Bengt Holmstrom,et al.  Herd Behavior and Investment , 2022 .

[5]  Cristi A. Gleason,et al.  Characteristics of Price Informative Analyst Forecasts , 2000 .

[6]  Maureen F. McNichols,et al.  Underwriting relationships, analysts' earnings forecasts and investment recommendations , 1998 .

[7]  L. Hansen.  Large Sample Properties of Generalized Method of Moments Estimators , 1982 .

[8]  David E. Runkle,et al.  Are Financial Analysts' Forecasts of Corporate Profits Rational? , 1998, Journal of Political Economy.

[9]  C. Holden,et al.  The Frequency of Financial Analysts' Forecast Revisions: Theory and Evidence , 2000 .

[10]  Wei Jiang,et al.  Analysts' Weighting of Private and Public Information , 2003 .

[11]  L. Festinger,et al.  A Theory of Cognitive Dissonance , 2017 .

[12]  Jeffrey D. Kubik,et al.  Security Analysts' Career Concerns and Herding of Earnings Forecasts , 1998 .

[13]  Scott E. Stickel.  The Anatomy of the Performance of Buy and Sell Recommendations , 1995 .

[14]  Maureen F. McNichols,et al.  Self-selection and Analyst Coverage , 1997 .

[15]  Donna R. Philbrick,et al.  Using Value Line And Ibes Analyst Forecasts In Accounting Research , 1991 .

[16]  Richard H. Thaler,et al.  Do Security Analysts Overreact , 1990 .

[17]  Philip B. Shane,et al.  Investor and (Value Line) Analyst Underreaction to Information About Future Earnings: The Corrective Role of Non-Earnings-Surprise Information , 2000 .

[18]  Tilman Ehrbeck,et al.  Why Are Professional Forecasters Biased? Agency versus Behavioral Explanations , 1996 .

[19]  Brett Trueman.  Analyst Forecasts and Herding Behavior , 1994 .

[20]  P. Sørensen,et al.  The Strategy of Professional Forecasting , 2001 .

[21]  W. Newey,et al.  Hypothesis Testing with Efficient Method of Moments Estimation , 1987 .

[22]  Terrance Odean,et al.  Volume, Volatility, Price, and Profit When All Traders are Above Average , 1998 .

[23]  L. Brown,et al.  Security Analyst Superiority Relative to Univariate Time-Series Models in Forecasting Quarterly Earnings , 1987 .

[24]  L. Brown,et al.  The Superiority of Analyst Forecasts as Measures of Expectations: Evidence from Earnings , 1978 .

[25]  Scott E. Stickel.  Predicting Individual Analyst Earnings Forecasts , 1990 .

[26]  Roni Michaely,et al.  Conflict of interest and the credibility of underwriter analyst recommendations , 1999 .

[27]  E. Fama.  Market Efficiency, Long-Term Returns, and Behavioral Finance , 1997 .

[28]  D. Scharfstein,et al.  Herd Behavior and Investment , 1990 .

[29]  L. Brown,et al.  Analyst Forecasting Errors: Additional Evidence , 1997 .

[30]  Ward Edwards,et al.  Judgment under uncertainty: Conservatism in human information processing , 1982 .

[31]  F. Eugene.  FAMA, . Market efficiency, long-term returns, and behavioral finance, Journal of Financial Economics . , 1998 .

[32]  B. M. Staw.  The Escalation of Commitment To a Course of Action , 1981 .

[33]  Terence Lim,et al.  Rationality and Analysts' Forecast Bias , 2001 .

[34]  A. Tversky,et al.  The weighing of evidence and the determinants of confidence , 1992, Cognitive Psychology.

[35]  Brad M. Barber,et al.  Can Investors Profit from the Prophets? Consensus Analyst Recommendations and Stock Returns , 1998 .

[36]  Richard R. Mendenhall.  Evidence on the Possible Underweighting of Earnings-Related Information , 1991 .

[37]  Siva Nathan,et al.  The Effect of Investment Banking Relationships on Financial Analysts' Earnings Forecasts and Investment Recommendations* , 1995 .

[38]  Peter D. Wysocki,et al.  Tracking Analysts' Forecasts Over the Annual Earnings Horizon: Are Analysts' Forecasts Optimistic or Pessimistic? , 1999 .

[39]  Frank R. Clarke.  Confidence Ratings, Second‐Choice Responses, and Confusion Matrices in Intelligibility Tests , 1960 .

[40]  Richard G. Sloan,et al.  Implications of the Integral Approach to Quarterly Reporting for the Post-Earnings-Accouncement Drift , 1999 .

[41]  P. Rousseeuw,et al.  Alternatives to the Median Absolute Deviation , 1993 .

[42]  Dale T. Miller,et al.  Self-serving biases in the attribution of causality: Fact or fiction? , 1975 .

[43]  L. Brown.  Managerial Behavior and the Bias in Analysts' Earnings Forecasts , 1998 .

[44]  Kent D. Daniel,et al.  Overconfidence, Arbitrage, and Equilibrium Asset Pricing , 2001 .

[45]  R. Cattell,et al.  Formal representation of human judgment , 1968 .

[46]  Owen A. Lamont.  Macroeconomic forecasts and microeconomic forecasters , 2002 .

[47]  Narasimhan Jegadeesh,et al.  Returns to Buying Winners and Selling Losers: Implications for Stock Market Efficiency , 1993 .

[48]  J. Graham.  Herding Among Investment Newsletters: Theory and Evidence , 1998 .

[49]  V. Bernard,et al.  Evidence that stock prices do not fully reflect the implications of current earnings for future earnings , 1990 .

[50]  Rafael La Porta,et al.  Expectations and the Cross-Section of Stock Returns , 1996 .

[51]  Y. Loewenstein.  The Accounting Review , 1972 .

[52]  Lars Stole,et al.  Impetuous Youngsters and Jaded Old-Timers: Acquiring a Reputation for Learning , 1996, Journal of Political Economy.

[53]  S. Fiske,et al.  The Handbook of Social Psychology , 1935 .

[54]  Timothy C. Johnson,et al.  Unifying Underreaction Anomalies , 2002 .

[55]  E. Fama,et al.  The Cross‐Section of Expected Stock Returns , 1992 .

[56]  Lawrence D. Phillips,et al.  Cultural Differences in Probabilistic Thinking , 1978 .

[57]  Victor L. Bernard,et al.  Tests of Analysts' Overreaction/Underreaction to Earnings Information as an Explanation for Anomalous Stock Price Behavior , 1992 .

[58]  J. Yates,et al.  Beliefs about Overconfidence, Including Its Cross-National Variation , 1996 .

[59]  April Klein,et al.  A direct test of the cognitive bias theory of share price reversals , 1990 .

[60]  Kent D. Daniel,et al.  Presentation Slides for 'Investor Psychology and Security Market Under and Overreactions' , 1998 .

[61]  顏乃欣,et al.  Cross-National Differences in Confidence , 1995 .

[62]  Winston R. Sieck,et al.  Cross-Cultural Variations in Probability Judgment Accuracy: Beyond General Knowledge Overconfidence? , 1998, Organizational behavior and human decision processes.

[63]  Glenn Ellison,et al.  Career Concerns of Mutual Fund Managers , 1998 .

[64]  M. McNichols,et al.  Does Meeting Expectations Matter? Evidence from Analyst Forecast Revisions and Share Prices , 1999 .

[65]  Josef Lakonishok,et al.  Momentum Strategies , 1995 .

[66]  J. M. Jellison,et al.  Effect of similarity and fortune of the other on attraction. , 1967, Journal of personality and social psychology.

[67]  Charles E. Wasley,et al.  Capital Markets Research in Accounting , 2001 .

[68]  R. H. Willis,et al.  Does Forecast Accuracy Matter to Security Analysts , 1999 .

[69]  B. Fischhoff,et al.  Calibration of probabilities: the state of the art to 1980 , 1982 .

[70]  Sigal G. Barsade,et al.  Escalation at the Credit Window: A Longitudinal Study of Bank Executives' Recognition and Write-Off of Problem Loans , 1997 .

[71]  David L. Ronis,et al.  Probability judgment accuracy: China, Japan, and the United States , 1989 .

[72]  William N. Goetzmann,et al.  COGNITIVE DISSONANCE AND MUTUAL FUND INVESTORS , 1997 .

[73]  Jennifer Francis,et al.  ANALYSTS DECISIONS AS PRODUCTS OF A MULTITASK ENVIRONMENT , 1993 .

[74]  George A. Akerlof,et al.  The Economic Consequences of Cognitive Dissonance , 1982 .

[75]  D. Hirshleifer.  Investor Psychology and Asset Pricing , 2001 .

[76]  The Quality of Analysts’ Forecasts of Earnings , 1984 .

[77]  S. Kothari.  Capital Markets Research in Accounting , 2001 .

[78]  Elizabeth C. Hirschman,et al.  Judgment under Uncertainty: Heuristics and Biases , 1974, Science.

[79]  Eric Zitzewitz.  Opinion-Producing Agents: Career Concerns and Exaggeration , 2001 .

[80]  T. Day,et al.  Following the leader: ☆: a study of individual analysts’ earnings forecasts , 2001 .

[81]  Eric Zitzewitz,et al.  Measuring Herding and Exaggeration by Equity Analysts and Other Opinion Sellers , 2001 .

[82]  Market Efficiency in an Irrational World , 1999 .

[83]  Jeffery Abarbanell.  Do analysts' earnings forecasts incorporate information in prior stock price changes? , 1991 .

[84]  Lawrence D. Brown,et al.  Forecast Selection When All Forecasts are Not Equally Recent , 1991 .