ESG investing: claims vs reality

ESG investing — screening portfolios by environmental, social, and governance criteria — is sold as a way to do well while doing good. Sometimes it's that. Often it's a higher-fee index fund with a marketing layer, holding most of the same companies as the S&P 500 in slightly different proportions. Neither cynics nor evangelists get this topic right; the details do.

What ESG ratings actually measure

Here's the part that surprises people: mainstream ESG ratings mostly measure risk TO the company, not harm BY the company. An oil major with excellent board governance and strong climate-risk disclosure can out-score a small solar firm with messy accounting. Rating agencies also disagree wildly — research from MIT found correlations between major providers' ESG scores of only about 0.6 (credit ratings agree at 0.99). The same company can be an ESG leader at one rater and a laggard at another.

Look inside the funds

Open the holdings of the largest ESG index funds and you'll find them dominated by the same megacap tech names as the regular index — plus, in many 'ESG-screened' broad funds, oil companies, defense contractors, and fast-food chains that scored well within their industries. That's because most ESG indexes use 'best-in-class' weighting: they don't exclude industries, they overweight each industry's higher scorers. If you expected 'no fossil fuels,' the prospectus — not the fund name — is where you find out.

Does ESG help or hurt returns?

The honest answer from decades of research: mostly neither, once you control for fees and factor tilts. ESG funds ran hot in 2019–2021 (they were overweight tech, underweight energy) and cold in 2022 (same reason, reversed). Excluding sectors slightly reduces diversification; theory says constrained portfolios can't beat unconstrained ones on average, but the drag is small. The reliable performance difference isn't the screening — it's the extra fees, which compound against you with certainty.

If values alignment matters to you, do it well

• Decide what you actually want: exclusion (own no X), tilting (own less X), or impact (change company behavior). Different products serve each.
• For exclusion, verify holdings, not names — search the fund's full holdings list for the companies you'd expect gone.
• For impact, engagement matters more than screening: index giants voting proxies, or direct investment in specific projects, moves needles more than selling shares to a buyer who doesn't care.
• Cap the cost: an ESG fund charging 0.15% is a values expense you can justify; 0.60% rarely is.
• Consider the barbell: hold the cheap total-market fund and direct real dollars — donations, community investment — to causes. Often more impact per dollar than portfolio screening.

The bottom line

ESG investing is neither a scam nor a free lunch. Ratings measure less than the labels imply, most ESG funds look a lot like the regular index at five times the price, and returns wash out to roughly market-minus-fees. If aligning your portfolio with your values is worth a modest, known cost — and for many people it genuinely is — buy it with open eyes: read the holdings, cap the fees, and don't confuse feeling good with doing good. The prospectus tells the truth; the fund name is an ad.

The fee and concentration math investors skip

Whatever you conclude about ethics or returns, run the numbers you can actually verify. ESG fund expense ratios have fallen but still average roughly 0.15-0.40% against 0.03% for plain index funds — on a $300,000 portfolio, that is $360 to $1,100 a year of extra cost for a portfolio that typically overlaps the ordinary index by 85-95%. Put differently, you may be paying ten times the fee to change 10% of your holdings. If values alignment is worth that to you, it is a legitimate purchase — people pay premiums for alignment in every other part of life — but it should be bought with clear eyes: check the fund's actual top-ten holdings against the plain index (they are often nearly identical), check the fee, and check whether the screen excludes what you personally care about, because 'ESG' methodologies disagree with each other more than most buyers ever discover. The alternative approach costs nothing: hold the cheap broad index, and direct the fee savings — real dollars every year — to causes you choose deliberately, a strategy some analysts argue delivers more actual-world impact per dollar than any screening methodology.

Whichever route you take, decide it once, write down the reasoning, and judge the result over decades — the same discipline every other allocation deserves.

Values and returns can coexist in a portfolio, but only when you verify what the label is actually selling.