This has 3 key impacts: 1. Good ESG ratings ≠ better returns 2. Confused & frustrated management teams 3. Noisy data making empirical research harder
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This interesting & important paper found that the top four ESG ratings agencies (MSCI, S&P Global, Moody's & Refinitiv) give, on average, materially different ESG ratings for the same company. "Aggregate Confusion": https://poseidon01.ssrn.com/delivery.php?ID=083008085091003110122008067102004023014014073092023027101000111086026071106093084125028029021119038017111107029113120017006027122075014092018093004113118080066009022040064023094025088120120028090112092124011009119102106016017024009023093124093008114064&EXT=pdf&INDEX=TRUE …pic.twitter.com/kKhGcTrBYR
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This is another related paper: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3722087 … ESG rating agencies appear to rewrite historical data based on past performance, making it even more difficult to run unbiased empirical studies.
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