Millions of investors who believe they hold a broadly diversified emerging markets fund may be surprised to learn how dramatically artificial intelligence has reshaped what those funds actually own. A surge in demand for AI-related semiconductors has elevated South Korean chipmakers — most notably Samsung Electronics and SK Hynix — into positions of unexpected dominance inside two of the most widely held emerging market exchange-traded funds. For investors who thought they were spreading risk across dozens of developing economies, the AI chip sector has quietly become a defining exposure.
According to a MarketWatch report, South Korea was not historically a significant weight in emerging market benchmarks. That calculus changed as the global AI build-out accelerated demand for high-bandwidth memory chips, a segment in which South Korean manufacturers hold commanding market positions. The country’s weighting in key emerging market indices has climbed sharply as a result, catching many passive investors off guard.
How Two ETFs Became Proxies for the AI Trade
The iShares MSCI Emerging Markets ETF and the Vanguard FTSE Emerging Markets ETF, two of the largest funds of their kind with combined assets running into the hundreds of billions of dollars, have both seen their South Korea allocations expand meaningfully over recent years. South Korea’s weighting in the MSCI Emerging Markets index has at times exceeded 12 percent, a figure that would have seemed implausible a decade ago when the index was more heavily anchored to Chinese equities and broad commodity-linked economies.
The practical consequence is that an investor buying either of these funds expecting exposure to Southeast Asian consumer growth, Latin American commodities, or Indian infrastructure is also, whether they intend it or not, placing a meaningful bet on the global appetite for AI hardware. SK Hynix, a critical supplier of high-bandwidth memory chips used in Nvidia’s data centre processors, has become one of the more consequential single-stock risks embedded inside ostensibly passive vehicles. Samsung’s semiconductor division adds further concentration to that theme. The two names together can account for a combined weight that rivals or exceeds entire country allocations within the same funds.
The Hidden Concentration That Passive Strategies Carry
The issue extends beyond any single country. Index-construction methodology, which weights constituents by market capitalisation, means that whichever sector captures the imagination of global capital markets will, over time, accumulate disproportionate influence inside passive vehicles. This is not a flaw unique to emerging market funds. Large-cap US equity indices have faced similar criticism as mega-cap technology companies came to represent more than 30 percent of the S&P 500 by some measures. The same gravitational logic now applies to the AI-driven appreciation of semiconductor stocks in developing-world benchmarks.
For advisers and retail investors alike, the episode is a reminder that passive does not mean neutral. A fund tracking an index still reflects every valuation shift, sector rotation, and thematic surge that moves constituent stocks. Investors who assumed they were insulated from single-theme concentration by avoiding actively managed funds may need to revisit that assumption. Reviewing a fund’s current top-ten holdings, rather than relying on its name or historical composition, has become a more pressing discipline than it was before the AI era reshaped capital flows. Those interested in portfolio timing decisions more broadly should similarly account for how index rebalancing schedules interact with rapidly shifting sector weights.
The structural shift also has implications for how advisers frame emerging market allocations in client portfolios. What was once pitched as a way to access economic expansion in consumer-driven developing nations now carries a technology hardware overlay that is tightly linked to the capital expenditure cycles of US hyperscalers. If spending on AI infrastructure cools, the reverberations would travel quickly through these funds, regardless of what is happening in Brazil, India, or Indonesia. Passive investors, in other words, have become participants in the AI trade whether they signed up for it or not.