Understanding Analysts' Use and Under-Use of Stock Returns and Other Analysts' Forecasts when Forecasting Earnings

In this study, we examine how analysts are affected by the public actions of investors and other analysts by closely examining how analysts revise their earnings forecasts after an earnings announcement. In particular, we hypothesize that analysts observe the actions of investors and other analysts in order to more accurately forecast earnings and have the expertise to determine when these actions are most informative about future earnings. Consistent with our hypotheses, we find that analysts revise their earnings forecasts more strongly in response to returns and other analysts' revisions when these signals are more informative about future earnings changes. We also find that, consistent with analysts being conservative while facing uncertain information, underreactions are strongest (not weakest) when analysts are responding most strongly to these signals (i.e., when the signals are most informative). Lastly, we find that analysts who are most sensitive to the informativeness of others' actions are relatively more accurate in forecasting earnings, suggesting that the ability to extract information from the actions of others serves as a source of expertise for at least some analysts