Deconstructing ESG scores: how to invest with your own criteria

Torsten Ehlers, Ulrike Elsenhuber, Anandakumar Jegarasasingam and Eric Jondeau

No 1008, BIS Working Papers from Bank for International Settlements

Abstract: Environmental, Social, and Governance (ESG) scores are becoming an increasingly important tool for asset managers to design and implement ESG investment strategies. They amalgamate a broad range of fundamentally different factors, creating ambiguity for investors as to the signals of higher or lower ESG scores. We explore the feasibility and performance of more targeted investment strategies based on specific categories by deconstructing ESG scores into their granular components. First, we investigate the characteristics of the various categories underlying ESG scores. Not all types of ESG categories lend themselves to more targeted strategies, which is related to both limits to ESG data disclosure and the fundamental challenge of translating qualita-tive characteristics into quantitative measures. Second, we consider an investment scheme based on the exclusion of firms with the lowest scores in each category of interest. In most cases, this targeted strategy still allows investors to substantially improve the portfolio headline ESG score, with only a marginal impact on financial performance relative to a broad stock market benchmark. The exclusion results in regional and sectoral biases relative to the benchmark, which may be undesirable for some investors. We then implement a “best-in-class” strategy, based on exclud-ing firms with the lowest category scores and reinvesting the proceeds in firms with the highest scores maintaining the same regional and sectoral composition. This approach reduces the tracking error of the portfolio and slightly improves its risk-adjusted performance while still yielding a large gain in the headline ESG score.

Keywords: sustainable investment; ESG ratings; ESG investing; negative screening; best-in-class screening. (search for similar items in EconPapers)
JEL-codes: G11 G24 M14 Q01 (search for similar items in EconPapers)
Pages: 50 pages
Date: 2022-03
New Economics Papers: this item is included in nep-env and nep-fmk
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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Related works:
Working Paper: Deconstructing ESG Scores: How to Invest with your own Criteria? (2023)
Working Paper: Deconstructing ESG Scores: How to Invest with Your own Criteria (2022)
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Persistent link: https://EconPapers.repec.org/RePEc:bis:biswps:1008

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