Investopoly Ep 393: Does ethical investing generate better or worse returns?
Jan 27, 2026
A clear-eyed tour of ethical, ESG, and sustainable investing and why labels can be misleading. The discussion covers greenwashing, fund construction differences, and how exclusions can create unintended concentration and geographic tilts. You’ll hear evidence on ETF and fund performance, case studies of managers, and a practical core-satellite approach for balancing ethical aims with disciplined portfolio construction.
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Ethical Investing Is Not One Thing
- Ethical investing is a broad umbrella covering exclusions, ESG and sustainability with no single accepted definition.
- Stuart Wemyss warns you must inspect each product's filters and data because similar labels can hide very different portfolios.
Compare Weights To The Parent Index
- Compare an ethical fund's geographic and sector weights to its parent index to check whether it behaves like the index.
- Prefer funds that closely track a reputable broad index so you avoid taking unintended active bets.
Capital Flows Can Drive Outperformance
- Stuart argues "where money goes, returns flow" — concentrated capital into a small investable universe can lift returns.
- Narrow ethical screens can concentrate flows into few companies, increasing both potential return and concentration risk.
