Key Takeaways:

• The top 10 S&P 500 stocks now account for approximately 40% of the index, nearly double their share from a decade ago.
• International developed markets have recently traded at ~16x forward P/E vs. ~22x for the S&P 500, which may represent a valuation opportunity (MSCI EAFE, May 2026).
• VEFA seeks exposure to developed market companies outside the US and Canada, selected based on positive analyst sentiment signals.

Understanding Concentration Risk in the S&P 500

For investors using the S&P 500 as their primary equity allocation, a small number of mega-cap stocks now account for nearly 40% of the index, driving most of their returns and, in a downturn, most of their losses (VanEck, May 2026). Investors who have focused strictly on the US over the past decade have been rewarded with strong returns, but past performance is not a guarantee of future results, and a portfolio concentrated in a handful of names carries risks that broad diversification is designed to reduce.

What Is Concentration Risk?

Concentration risk occurs when portfolio returns are heavily dependent on a small number of stocks, sectors, or geographies. The S&P 500 itself is structurally concentrated at the index level, meaning even a passive allocation is top-heavy by design. While that concentration has rewarded investors over the past decade, holding only S&P 500 exposure means there is no buffer if that trend reverses. Concentration is not inherently bad, but it should be intentional.

How Concentrated Has the S&P 500 Become?

What was once a broadly diversified index has become increasingly top-heavy. A decade ago, the top 10 S&P 500 stocks accounted for roughly 18% of the index (VanEck, May 2016). Today that figure has nearly doubled, with the top 10 now representing close to 40% of the total index weight.

Top 10 Holdings Weight: S&P 500 vs. MSCI EAFE (2016 vs. 2026)

As of May 31, 2026 and May 31, 2016. Source: VanEck.

A passive S&P 500 allocation is now effectively an active sector bet, whether the investor intended it or not. By contrast, the MSCI EAFE index is significantly less concentrated, spreading risk more evenly across companies, sectors, and geographies.

Why Are Advisors Looking at International Diversification?

Several factors have converged to bring international diversification back into focus:

• Valuation gap: International markets trade at a meaningful discount to the S&P 500 on earnings multiples. The S&P 500 currently trades at a forward P/E of around 22x compared to roughly 16x for MSCI EAFE, a gap that has historically been a meaningful signal for relative returns.
• Unintentional sector bets: AI-driven concentration has quietly pushed many client portfolios into large overweights to tech and semiconductors that advisors often catch after the fact.
• Improving international fundamentals: European and Asian companies have shown encouraging signs of earnings improvement, supported by fiscal stimulus and corporate reform efforts, making the case for international exposure more than a valuation story.

What Does Developed International Exposure Actually Look Like?

Moving beyond the S&P 500 does not mean moving into speculative or illiquid markets. Developed international equities (as represented by MSCI EAFE) are large, profitable global companies, just listed outside the US and Canada. The MSCI EAFE universe covers large and mid-cap equities across Europe, Japan, and Australasia, including household names like Nestle, Toyota, ASML, and Novo Nordisk. The practical result is reducing the share of a portfolio that rises and falls with a small number of US mega-cap names, without sacrificing quality or liquidity.

How Can a Sentiment-Enhanced Approach Help Reduce Concentration Risk?

A broad EAFE allocation reduces concentration risk and provides geographic diversification, but holds the market with no tilt toward companies with improving fundamentals. An analyst sentiment-enhanced approach layers a sentiment signal on top of that diversification benefit, tilting toward companies where analyst revisions are trending positive. The result is geographic diversification plus a sentiment signal, rather than simply swapping US concentration for broad international exposure. This approach does carry some active risk relative to a plain EAFE index, but the strategy is designed to keep that risk within a defined range while still delivering the diversification benefit.

How Does VEFA Address S&P 500 Concentration Risk?

VEFA is designed to address the two challenges this blog outlines: the concentration risk embedded in an S&P 500-only allocation, and the missed opportunity of holding broad international exposure without any tilt toward improving fundamentals. The fund provides exposure to approximately 100 large and mid-cap developed market companies outside the US and Canada, selected based on positive analyst sentiment signals, and tracks the MSCI EAFE Analyst Sentiment Select Index (VanEck, May 2026). It rebalances quarterly and seeks to maintain ex-ante tracking error below 4% relative to MSCI EAFE (VanEck, May 2026).

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