iShares ESG MSCI KLD 400 ETF (DSI)

The iShares ESG MSCI KLD 400 ETF (DSI) holds roughly 400 large and mid-sized US publicly traded companies that pass an environmental, social, and governance (ESG) filter. The index the fund tracks — the MSCI USA ESG Select Reduced Fossil Fuel Index — begins with the universe of large and mid-cap stocks traded on US exchanges, then removes companies that fail ESG criteria, leaving a diversified portfolio tilted toward firms with higher ESG ratings or fewer material ESG controversies. It is not pure values-based exclusion like a sin-stock fund, but rather a quality screen: the intent is to exclude poor ESG performers while retaining broad equity exposure.

What ESG screening removes

The MSCI KLD index applies two types of filters. The first is exclusionary: companies involved in notably controversial businesses — tobacco manufacturers, for instance, or weapons makers — are simply removed. The index also excludes the largest fossil-fuel producers and the most coal-intensive utilities, though it does not ban all energy or utility stocks.

The second type is quantitative. MSCI scores each company on dozens of ESG metrics: environmental impact, board diversity, executive compensation practices, labour standards, supply-chain oversight, community relations, and more. The index construction systematically excludes the lowest-scoring quintile of companies (the 20% with the poorest ESG ratings), which removes firms with material weaknesses in areas like workplace safety, customer satisfaction, or regulatory compliance. The result is a large-cap and mid-cap portfolio that tilts toward higher-ESG firms but does not exclude entire sectors.

Size and composition

DSI’s portfolio of roughly 400 holdings provides real diversification. The largest positions are typical mega-cap technology and healthcare names; financial services and industrials are well represented; real estate, energy, and consumer staples are also included but typically in lower weights than a market-cap-weighted index because many of the worst ESG performers in those sectors are screened out. The fund is regularly rebalanced to stay aligned with its index, and the index is reconstituted annually.

The expense ratio is around 0.20%, a competitive rate for an actively screened index fund. DSI trades with high liquidity — it is one of the larger ESG-focused ETFs in the US market — and the bid-ask spread is typically a few basis points.

ESG returns and the performance question

A persistent question haunts ESG investing: does screening for ESG quality help returns, hurt them, or change nothing? The honest answer is that it depends on the period and the market. Over the past decade, ESG-screened portfolios in the US have performed comparably to unscreened benchmarks; in some periods they have outperformed, in others lagged. Some of that outperformance or underperformance reflects the fact that ESG-screened portfolios naturally tilt away from fossil fuels and some value stocks while overweighting technology and healthcare — essentially a sector rotation buried inside an ESG wrapper.

Critically, DSI is not designed to outperform the broad market. It aims to deliver equity-market returns while incorporating ESG criteria. The index is designed to have broad exposure to US large and mid-cap equities, and to that end it succeeds — it is not a factor fund hunting for value or momentum, nor a concentrated thematic bet on green energy or social justice. It is a broad index with a filter applied.

Who holds DSI and why

DSI attracts three main cohorts. First are investors with genuine values-based preferences — institutional asset owners like universities or pension funds that are mandated by their boards to screen for ESG factors. Second are investors who believe ESG quality (companies with good governance, happy employees, lower environmental impact) correlates with durability and lower risk — they are buying ESG not as a moral stance but as a risk-management tool. Third are retail investors who want broad US equity exposure but prefer not to hold companies involved in tobacco, weapons, or fossil fuels, and DSI offers that without requiring them to hand-pick stocks.

In the institutional world, DSI has become a workhorse — many large endowments and pension funds own it as a core US equity holding, believing the ESG screen removes some genuinely problematic companies while the broad index ensures they are not missing meaningful parts of the equity market.

ESG rating volatility and the screening question

One practical risk in any ESG-screened fund is that ESG ratings and methodologies evolve. MSCI changes its ESG framework regularly; a company that is screened in one year might be screened out the next if its rating deteriorates, or vice versa. This creates turnover and tracking error — the fund has to rebalance more frequently than a simple market-cap-weighted index would. It also means that ESG screening outcomes are not static; the fund’s composition shifts over time as raters and companies’ own practices change.

Also, no two ESG raters agree perfectly. MSCI’s ESG framework is different from Sustainalytics’, which differs from FTSE Russell’s. A company that looks clean by MSCI standards might fail another rating system’s tests. DSI is specifically built on MSCI’s framework; if you have strong convictions about ESG methodology, read MSCI’s index methodology document to understand exactly what is being screened in and out.

How to research DSI

The fund’s fact sheet and annual report detail the current holdings and the index composition. MSCI publishes a detailed methodology document explaining the ESG metrics used and the scoring process — this is worth reading if you care about the specifics of what “ESG quality” means in this context. For any particular company you are curious about, you can look up its MSCI ESG rating on the MSCI website or through Bloomberg terminals.

To decide whether ESG screening matters for your portfolio, consider whether you have specific values you want your investments to reflect, whether you believe ESG quality correlates with lower business risk, or whether you simply want the broad equity market but with the worst corporate actors removed. All three are coherent reasons to hold DSI; conflating them or expecting ESG screening to deliver outsized returns often leads to disappointment.