Quick Answer: ESG (Environmental, Social, and Governance) investing screens companies based on their environmental impact, social responsibility, and corporate governance practices. ESG-focused ETFs like ESGU (iShares ESG Aware) and ESGV (Vanguard ESG) let you invest in broadly diversified portfolios that exclude the worst offenders — fossil fuels, weapons manufacturers, tobacco, and controversial companies — while maintaining returns competitive with conventional index funds.
Key Takeaways
- ESG ETFs from Vanguard and iShares cost 0.09-0.15% — only slightly more than conventional index funds
- ESG funds exclude or underweight companies with poor environmental, social, or governance practices
- Historical ESG fund returns have been roughly comparable to conventional index fund returns over 10+ years
- Different ESG funds apply different screens — check what each fund actually excludes before investing
- ESG isn't just ethical — companies with strong governance practices may carry lower long-term risk
ESG evaluates companies across three dimensions
ESG evaluates companies across three dimensions. Environmental: carbon emissions, waste management, water usage, renewable energy commitments, and climate change preparedness. Social: labor practices, diversity and inclusion, community impact, supply chain ethics, and product safety. Governance: board independence, executive compensation fairness, shareholder rights, transparency, and anti-corruption policies. ESG scores don't measure whether a company is 'good' or 'bad' — they assess specific, measurable criteria related to sustainability and corporate responsibility. A company can score well on governance but poorly on environmental impact. Different ESG rating agencies (MSCI, Sustainalytics, S&P) weight these factors differently, which is why ESG scores vary across providers.ESG funds typically start with a broad
ESG funds typically start with a broad market index and apply screens. Negative screening excludes companies involved in specific activities: fossil fuel extraction, weapons manufacturing, tobacco, gambling, or private prisons. Positive screening overweights companies with strong ESG practices. Best-in-class approaches keep all sectors represented but select the ESG leaders within each sector. For example, an ESG fund might exclude ExxonMobil (fossil fuels) but include Microsoft (strong environmental commitments and governance). The result is a portfolio that's 80-95% similar to a conventional index fund but tilted toward companies with better sustainability practices. Returns have been roughly comparable — sometimes slightly better, sometimes slightly worse — because ESG exclusions remove both some winners and some losers.ESGU (iShares ESG Aware MSCI USA ETF) holds 300+ U
ESGU (iShares ESG Aware MSCI USA ETF) holds 300+ U.S. large-cap stocks screened for ESG criteria at a 0.15% expense ratio — it's one of the largest ESG ETFs. ESGV (Vanguard ESG U.S. Stock ETF) excludes fossil fuels, weapons, tobacco, gambling, alcohol, nuclear power, and adult entertainment at 0.09% — a broader exclusion list than most. SUSA (iShares MSCI USA ESG Select ETF) is more selective, holding roughly 175 companies with the strongest ESG ratings. For international ESG exposure, ESGD (iShares ESG Aware MSCI EAFE ETF) covers developed markets outside the U.S. For bonds, EAGG (iShares ESG Aware U.S. Aggregate Bond ETF) applies ESG screens to the bond market at 0.10%.The most common question about ESG investing:
The most common question about ESG investing: does it cost you returns? The evidence is mixed but generally reassuring. Over the past decade, the MSCI USA ESG Leaders Index has performed within 0.5% annually of the conventional MSCI USA Index — sometimes ahead, sometimes behind. ESG funds missed out on some fossil fuel gains during energy price spikes but avoided losses from corporate scandals and environmental liabilities. Academic research suggests that strong ESG practices correlate with lower volatility and fewer extreme negative events (lawsuits, regulatory fines, PR crises), which may benefit long-term risk-adjusted returns. The honest answer: ESG investing is unlikely to significantly help or hurt your returns compared to conventional indexing over 20+ year periods.Not all ESG is created equal
Not all ESG is created equal. If your primary concern is climate change, look for funds that specifically exclude fossil fuels and overweight renewable energy companies (ESGV, ICLN). If you care about social issues, examine the fund's screens for labor practices, diversity metrics, and community impact. If governance is your focus, funds screening for board independence and executive pay practices may be most aligned. Some investors prefer 'broad ESG' funds that apply light screens across all dimensions while maintaining maximum diversification. Others prefer thematic funds focused on clean energy, gender diversity, or sustainable agriculture. Read the fund prospectus and methodology — the name alone doesn't tell you what's actually in the fund.Making Smart Choices
An all-ESG three-fund portfolio is straightforward: ESGV or ESGU (U.S. ESG stocks, 50-60%), ESGD or VSGX (international ESG stocks, 20-30%), and EAGG (ESG bonds, 10-30%). This gives you global diversification with ESG screens across every holding for total expenses of 0.09-0.15%. Alternatively, use conventional index funds for your core portfolio and add ESG satellite positions: keep VTI as your base U.S. holding but add a clean energy ETF (ICLN) or social impact fund for the portion of your portfolio where values alignment matters most. Either approach is valid — the key is choosing an approach you'll stick with through market cycles rather than one that looks perfect on paper.| Fund | Expense Ratio | Exclusions | Holdings | Focus |
|---|---|---|---|---|
| ESGV (Vanguard) | 0.09% | Fossil fuels, weapons, tobacco, gambling, nuclear | 1,500+ | Broad exclusion |
| ESGU (iShares) | 0.15% | Controversial weapons, tobacco, thermal coal | 300+ | ESG aware large-cap |
| SUSA (iShares) | 0.25% | Top ESG-rated companies only | 175+ | Best-in-class ESG |
| ICLN (iShares) | 0.40% | Only clean energy companies | 100+ | Climate/clean energy theme |
| VTI (conventional) | 0.03% | None | 4,000+ | Total market (non-ESG baseline) |
Our Methodology
ESG fund data reflects published prospectuses, exclusion criteria, and expense ratios as of April 2026. Performance comparisons reference MSCI ESG index data spanning 10+ years. ESG scoring criteria vary by provider (MSCI, Sustainalytics, S&P). Fund recommendations are based on cost, diversification, screening methodology, and assets under management.
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