{"title":"News about biodiversity risk and excess value of diversification","authors":"Amanjot Singh","doi":"10.1111/irfi.70042","DOIUrl":null,"url":null,"abstract":"<p>This study investigates the excess value implications of news about biodiversity risk for investors of diversified firms using a sample of 1019 US firms from 2001 to 2023. In a given year, more positive news about biodiversity risk increases the value of diversified firms relative to a benchmark portfolio of single-segment firms, especially for large-diversified firms. This diversification premium effect, that is, the excess value of diversified firms, in response to positive news about biodiversity risk, is non-linear, robust to several alternative specifications, and exists regardless of internal capital market efficiency, number of business segments, excess net income, and the climate change exposure of diversified firms. Our study highlights the potent role of diversified firms in exploiting biodiversity protection-related investment opportunities, as investors attach a relative premium to such firms.</p>","PeriodicalId":46664,"journal":{"name":"International Review of Finance","volume":"25 4","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Review of Finance","FirstCategoryId":"96","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/irfi.70042","RegionNum":4,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BUSINESS, FINANCE","Score":null,"Total":0}
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Abstract
This study investigates the excess value implications of news about biodiversity risk for investors of diversified firms using a sample of 1019 US firms from 2001 to 2023. In a given year, more positive news about biodiversity risk increases the value of diversified firms relative to a benchmark portfolio of single-segment firms, especially for large-diversified firms. This diversification premium effect, that is, the excess value of diversified firms, in response to positive news about biodiversity risk, is non-linear, robust to several alternative specifications, and exists regardless of internal capital market efficiency, number of business segments, excess net income, and the climate change exposure of diversified firms. Our study highlights the potent role of diversified firms in exploiting biodiversity protection-related investment opportunities, as investors attach a relative premium to such firms.
期刊介绍：
The International Review of Finance (IRF) publishes high-quality research on all aspects of financial economics, including traditional areas such as asset pricing, corporate finance, market microstructure, financial intermediation and regulation, financial econometrics, financial engineering and risk management, as well as new areas such as markets and institutions of emerging market economies, especially those in the Asia-Pacific region. In addition, the Letters Section in IRF is a premium outlet of letter-length research in all fields of finance. The length of the articles in the Letters Section is limited to a maximum of eight journal pages.
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