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ESG News Sentiment and Stock Price Reactions: A Comprehensive Investigation via BERT

Author

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  • Gregor Dorfleitner

    (University of Regensburg
    CERMi (Centre for European Research in Microfinance))

  • Rongxin Zhang

    (University of Regensburg)

Abstract

In this paper, we examine in a systematic manner how investors react to the sentiment of instant ESG news. Instead of acquiring proprietary ESG news or events datasets directly from specific ESG data providers, we extract fresh ESG news directly from a plethora of raw news articles. We showcase how the latest development in NLP (i.e. the BERT model) can be applied to build a comprehensive and fresh ESG news dataset, and how company ESG news sentiment can be efficiently recognized by a machine. Overall, we find that the market reacts to ESG news based on news sentiment. On the event day, positive ESG news has an average abnormal return of 0.31% while negative ESG news leads to a mean value of $$-0.75$$ - 0.75 %. More interestingly, we find that the impact of ESG news may depend on the company’s historical ESG record. The negative impact of negative ESG news has less severe consequences for companies with an overall better ESG record, while the positive impact of positive ESG news may be more pronounced for companies with a worse ESG record.

Suggested Citation

  • Gregor Dorfleitner & Rongxin Zhang, 2024. "ESG News Sentiment and Stock Price Reactions: A Comprehensive Investigation via BERT," Schmalenbach Journal of Business Research, Springer, vol. 76(2), pages 197-244, June.
    • Handle: RePEc:spr:sjobre:v:76:y:2024:i:2:d:10.1007_s41471-024-00185-3
    DOI: 10.1007/s41471-024-00185-3
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    More about this item

    Keywords

    ESG; Instant ESG News; NLP; BERT; Sentiment Analysis;
    All these keywords.

    JEL classification:

    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • Q51 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Valuation of Environmental Effects
    • Q56 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environment and Development; Environment and Trade; Sustainability; Environmental Accounts and Accounting; Environmental Equity; Population Growth

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