There is a logical bound on the time-series variability of analyst forecasts; when variability exceeds this bound it must be caused by something besides statistically rational forecasting. We document occurrences of excessively volatile analyst forecasts and show that they influence investment...

We investigate why extreme positive earnings surprises occur and the consequences of these events. We posit that managers know before analysts when extremely good earnings news is developing, but can have incentives to allow the earnings news to surprise the market at the earnings announcement....