Dynamics of analyst forecasts and emergence of complexity: Role of information disparity

Chansoo Kim, Daniel S. Kim, Kwangwon Ahn, M. Y. Choi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report complex phenomena arising among financial analysts, who gather information and generate investment advice, and elucidate them with the help of a theoretical model. Understanding how analysts form their forecasts is important in better understanding the financial market. Carrying out big-data analysis of the analyst forecast data from I/B/E/S for nearly thirty years, we find skew distributions as evidence for emergence of complexity, and show how information asymmetry or disparity affects financial analysts' forming their forecasts. Here regulations, information dissemination throughout a fiscal year, and interactions among financial analysts are regarded as the proxy for a lower level of information disparity. It is found that financial analysts with better access to information display contrasting behaviors: a few analysts become bolder and issue forecasts independent of other forecasts while the majority of analysts issue more accurate forecasts and flock to each other. Main body of our sample of optimistic forecasts fits a log-normal distribution, with the tail displaying a power law. Based on the Yule process, we propose a model for the dynamics of issuing forecasts, incorporating interactions between analysts. Explaining nicely empirical data on analyst forecasts, this provides an appealing instance of understanding social phenomena in the perspective of complex systems.

Original languageEnglish
Article numbere0177071
JournalPloS one
Volume12
Issue number5
DOIs
Publication statusPublished - 2017 May

Fingerprint

Data Display
Access to Information
Information Dissemination
Normal Distribution
Proxy
Theoretical Models
Information dissemination
Normal distribution
Large scale systems
Display devices
information dissemination
dynamic models
data analysis
flocks
tail
markets
Power (Psychology)
sampling
Big data
Financial markets

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Kim, Chansoo ; Kim, Daniel S. ; Ahn, Kwangwon ; Choi, M. Y. / Dynamics of analyst forecasts and emergence of complexity : Role of information disparity. In: PloS one. 2017 ; Vol. 12, No. 5.
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Dynamics of analyst forecasts and emergence of complexity : Role of information disparity. / Kim, Chansoo; Kim, Daniel S.; Ahn, Kwangwon; Choi, M. Y.

In: PloS one, Vol. 12, No. 5, e0177071, 05.2017.

Research output: Contribution to journalArticle

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