Emerging market stock indexes are becoming increasingly top-heavy, driven by massive rallies in a few key technology giants. This concentration creates hidden risks for investors who believe they are diversified across developing economies.
Educational content only — not personalized financial, legal, or tax advice.
Many retail investors use emerging market (EM) ETFs to gain broad exposure to the growth of developing nations. However, recent market movements have revealed a startling trend: these indexes are becoming dangerously concentrated. A handful of technology giants, specifically TSMC, Samsung, and SK Hynix, now account for a disproportionate share of total index performance.
This concentration is largely the result of the global AI hardware boom. As these companies dominate the semiconductor supply chain, their stock prices have surged, pulling the entire EM index upward. While this has been profitable for investors, it has fundamentally changed the risk profile of these funds.
When an index relies on just three or four companies for the majority of its gains, it loses the benefit of true diversification. If the semiconductor cycle turns or if geopolitical tensions impact these specific firms, the entire EM portfolio could suffer significant drawdowns. Investors are essentially making a concentrated bet on the tech sector rather than a broad bet on emerging market growth.
Investors should check the 'top holdings' of their international or emerging market funds. If the top five companies represent more than 25% of the fund's assets, the portfolio is highly sensitive to the performance of those specific entities. It may be time to rebalance or supplement these holdings with funds that offer broader exposure to non-tech sectors in developing markets.