How a sustainability index can keep Exxon but drop Tesla – and 3 ways to fix ESG ratings to meet investors' expectations
- Written by Tom Lyon, Professor of Sustainable Science, Technology and Commerce and Business Economics, University of Michigan

A major stock index that tracks sustainable investments dropped electric vehicle-maker Tesla from its list in May 2022 – but it kept oil giant ExxonMobil. That move by the S&P 500 ESG Index has set...