Overreaction and underreaction in analysts' forecasts

Eli Amir, Yoav Ganzach

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


We examine hypotheses derived from behavioral decision theory regarding conditions that lead to overreaction and conditions that lead to underreaction in analysts' earnings forecasts. We argue that three heuristics jointly influence earnings forecasts: leniency, representativeness and anchoring and adjustment. We present a model for the concurrent influence of these heuristics on forecast errors, and examine three predictions of this model: (1) that there is a tendency towards overreaction in forecast changes and underreaction in forecast revisions, (2) that there is overreaction to positive forecast modifications and underreaction to negative forecast modifications, and (3) that these biases increase with the forecast horizon.

Original languageEnglish
Pages (from-to)333-347
Number of pages15
JournalJournal of Economic Behavior and Organization
Issue number3
StatePublished - 30 Nov 1998
Externally publishedYes


  • Analysts' earnings forecasts
  • C44
  • Forecasts errors
  • M10
  • M40
  • Optimism
  • Overreaction
  • Underreaction


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