The evidence points in a consistent direction. Corporate Knights’ Clean200 — the 200 largest publicly traded companies by clean revenue — outpaced the MSCI World Index by approximately 29% over 8.5 years. Morgan Stanley found sustainable funds led traditional peers by about 9% from 2019 through 2025. Research from Schroders and Oxford Saïd Business School finds up to 9% annualized alpha for high-impact portfolios. NextEra Energy (NEE) delivered roughly 700% total return over 10 years against approximately 190% for the S&P Utilities Index. This guide covers the full performance record and the mechanisms behind it.
For the broader context on how the performance record fits into a complete sustainable investing strategy, see the Ziggma Sustainable Investing Guide for 2026.
The full guide is coming soon. In the meantime, the Ziggma Impact Investing Guide covers the complete performance case for impact investing in public markets.
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