Noise in Expectations: Evidence from Analyst Forecasts

Tim de Silva and David Thesmar

No 28963, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: This paper quantifies the amount of noise and bias in analysts’ forecast of corporate earnings at various horizons. We first show analyst forecasts outperform statistical forecasts at short-horizons, but underperform at longer horizons. We next decompose the relative accuracy of these forecasts into three components: (i) noise, (ii) bias and (iii) analysts’ information advantage over statistical forecasts. We find the information advantage is constant across forecasting horizons, while both noise and bias are increase linearly. We then show most existing models lack a mechanism to account for these facts. To generate such a mechanism, we consider a parsimonious variant of the model of Patton and Timmermann (2010) with a noisy cognitive default and show it quantitatively fits the data. The intuition underlying this model is that forecasters rely on their biased and noisy defaults more at longer horizons, as rational forecasts are less accurate. This model also quantitatively matches two non-targeted empirical relationships: (i) analyst disagreement increases with horizon and (ii) noise is an increasing function of volatility.

JEL-codes: D84 D9 D91 (search for similar items in EconPapers)
Date: 2021-06
New Economics Papers: this item is included in nep-cwa
Note: CF
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Citations: View citations in EconPapers (2)

Published as Tim de Silva & David Thesmar & Stefano Giglio, 2024. "Noise in Expectations: Evidence from Analyst Forecasts," The Review of Financial Studies, vol 37(5), pages 1494-1537.

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