AI Boom Powers TSMC Dominance in Emerging Markets Index

Taiwan Semiconductor Manufacturing Co. (TSMC) now holds a significant 14.2% weight in the MSCI Emerging Markets (EM) index, the largest for a single company in 30 years. This surge has pushed Taiwan to the top-weighted country at 24.84%, overtaking China. The main driver is the global excitement around artificial intelligence (AI) and semiconductor demand. TSMC, the world's top contract chip maker, is considered the primary beneficiary of this trend. Its market capitalization stands at roughly $2.04 trillion.

Valuations Diverge: AI vs. Traditional

This AI rally has created a clear difference in valuations. TSMC's P/E ratio is now around 37.66 (as of May 4, 2026), well above its usual range. Yet, foreign brokerages favor Taiwan and South Korea, seeing them as better-valued plays in the AI supply chain. Meanwhile, India's Sensex has fallen 4.49% year-on-year (as of May 5, 2026), with MSCI India down 16%. Major Indian companies like HDFC Bank trade at a P/E of about 15.6-15.69, and Reliance Industries at roughly 22.24. These valuations align more with traditional industries than high-growth tech.

Index Concentration Grows

The MSCI EM index, meant for broad emerging market diversification, now faces significant concentration risks. The top 10 companies make up 34.64% of the index weight, a level not seen in many years. This narrowness exposes passive funds to substantial risk from individual stocks, as the performance of a few large tech companies heavily impacts overall returns. Acadian Asset Management has noted this concentration is now greater than when Chinese mega-caps surged post-COVID.

India's Shrinking Role

India's weight in the MSCI EM index has dropped to 11.94%, its lowest in over six years, down from a peak of nearly 21% in September 2024. This is due to its sector mix, which leans heavily on financials, consumer staples, and IT services, with little direct AI hardware exposure. Although Indian companies like HDFC Bank and Reliance Industries are top constituents, their MSCI EM weights are only 0.79% each. India's market decline contrasts sharply with Taiwan's 77% gain and South Korea's 124% surge over a similar period, during which the MSCI EM index itself rose 46%.

Concentration Risk: Tech Dominance Creates Dangers for Investors

With a few technology giants, mainly TSMC, holding such large weights, the MSCI EM index has become a concentrated bet on AI. This carries significant risks. If TSMC or other leading AI companies face unexpected challenges, such as supply chain issues, geopolitical problems, or fading AI investment interest, the index's performance would suffer greatly. The limited economic representation means a drop in these tech stocks could hide strength elsewhere in emerging markets, potentially misleading investors. Relying on a few companies for most of the index's value also means sharp, unpredictable swings are more likely, moving away from the goal of diversified emerging market exposure. This structure offers less protection against technology sector downturns compared to more diverse indices.

Outlook and Analyst Views

Most foreign brokerages currently favor South Korea and Taiwan, seeing them as AI supply chain leaders with better valuations than India, which is now a consensus 'underweight' position. Analysts note continuing demand for AI capacity, supporting TSMC's fundamentals and long-term outlook. However, the ongoing concentration in the MSCI EM index suggests investors wanting pure emerging market exposure might need to rethink their strategy to manage the high risks from this narrow composition, or look for benchmarks with broader economic representation.