Questioning the news about economic growth: Sparse forecasting using thousands of news-based sentiment values

David Ardia, Keven Bluteau*, Kris Boudt

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The modern calculation of textual sentiment involves a myriad of choices as to the actual calibration. We introduce a general sentiment engineering framework that optimizes the design for forecasting purposes. It includes the use of the elastic net for sparse data-driven selection and the weighting of thousands of sentiment values. These values are obtained by pooling the textual sentiment values across publication venues, article topics, sentiment construction methods, and time. We apply the framework to the investigation of the value added by textual analysis-based sentiment indices for forecasting economic growth in the US. We find that the additional use of optimized news-based sentiment values yields significant accuracy gains for forecasting the nine-month and annual growth rates of the US industrial production, compared to the use of high-dimensional forecasting techniques based on only economic and financial indicators.

Original languageEnglish
Pages (from-to)1370-1386
Number of pages17
JournalInternational Journal of Forecasting
Volume35
Issue number4
DOIs
Publication statusPublished - 2019

Keywords

  • Elastic net
  • Sentiment analysis
  • Sentometrics
  • Time series aggregation
  • Topic-sentiment
  • US industrial production

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