ESG investment strategies
There is no single way to “invest ESG.” Investors combine several approaches depending on their goals: reducing risk, aligning the portfolio with personal or institutional values, or achieving measurable impact.
| Strategy | How it works | Example |
|---|---|---|
| Negative screening (exclusion) | Removes certain sectors, companies or practices from the investment universe | Excluding tobacco producers or companies involved in serious human rights violations |
| Positive screening (best-in-class) | Selects the companies with the best ESG performance in each sector | Choosing the most energy-efficient companies in an industrial sector |
| ESG integration | Systematically includes ESG factors in financial analysis, alongside traditional indicators | Adjusting cost estimates for future energy prices or drought risk |
| Thematic investing | Focuses on sustainability-related themes | A portfolio focused on renewable energy or water |
| Impact investing | Intentionally seeks measurable social or environmental impact alongside a financial return | Financing affordable housing projects and reporting the number of families who benefit |
| Shareholder engagement | Dialogue with management and voting at general meetings to improve practices | Asking for emissions reduction targets |
ESG ratings and their limitations
ESG ratings are assessments issued by specialized providers that try to summarize a company's ESG performance or exposure to ESG risks in a score or grade. They are useful as a starting point, but should be used with caution.
- Different methodologies: providers choose different topics, weightings and data sources, so the same company can receive very different scores.
- What exactly is measured: some ratings assess ESG risk to the company, others the company's impact on the world; the two are not the same.
- Incomplete data: many scores rely on information reported by the company itself or on estimates.
- Size matters: large companies with dedicated reporting teams may get better scores simply because they publish more information.
- Scores are not credit ratings: a high ESG score says nothing directly about the issuer's ability to repay its debts.
Greenwashing: how to recognize it
- Vague terms such as “eco-friendly,” “nature-friendly” or “climate neutral,” with no data and no methodology.
- A focus on a small, visible project while the core business remains highly polluting and has no transition plan.
- Very long-term targets with no interim targets, allocated budget or designated owners.
- No external review, or allocation and impact reports that are late or missing.
- A fund's name suggests a green theme, but the portfolio holds few assets related to that theme.
- Emissions offsetting presented as the main solution instead of actual emission reductions.
An investor checklist
- Clarify your goalDo you want to reduce risk, avoid certain sectors or achieve measurable impact? The right strategy depends on your answer.
- Analyze the credit firstWith a green bond, the label does not replace analysis of the issuer's financial position, the maturity, the coupon and the liquidity.
- Read the green documentsCheck the financing framework, the second-party opinion and the eligible project categories, including exclusions.
- Follow the reportingCheck whether allocation and impact reports are published on time, with concrete figures and an explained methodology.
- Look at the big pictureCompare the financed projects with the issuer's strategy and core business, and do not rely on a single ESG rating.
Key takeaways
- ESG strategies include negative and positive screening, ESG integration, thematic investing, impact investing and shareholder engagement.
- Impact investing requires intention and measurable impact, not just exclusions.
- ESG ratings differ between providers because of their methodologies, and they do not replace credit analysis.
- Greenwashing can be recognized by vague claims, missing data, the lack of an external review and gaps between message and content.
- A green label complements, but does not replace, financial analysis of the issuer.
Check your knowledge
Answer all the questions. If you answer all of them correctly, the lesson is marked as completed automatically.
Explanation: Removing certain sectors or companies from the investment universe is negative screening.
Explanation: Differences in methodology, topics analyzed and data explain why scores can vary significantly between providers.
Explanation: A large gap between the marketing message and the actual content of the portfolio is a typical sign of greenwashing; the other options are good practices.
Educational material only. It does not constitute investment, legal or tax advice. Numerical examples are hypothetical.