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May 28, 2026 8:00 AM

Wall Street Rally Rests On 'Very Narrow Subset Of Stocks,' Analyst Warns— Is AI Driving A Melt-Up?

Wall Street's rally is becoming increasingly dependent on a small group of mega-cap technology stocks, Standard Chartered analyst Daniel Lam warned on CNBC Thursday, raising concerns that weakening market breadth could make the gains harder to sustain.

“Equities is right now being driven by very very narrow subset of stocks”, Lam, Head of Cross-Asset Derivative Strategy at Standard Chartered Wealth Solutions, said, and added that the high-end semiconductor stocks or the memory stocks are the ones that are driving equity market stocks.

A Handful Of Tech Stocks Continue To Lead

A small group of AI-linked mega-cap tech stocks, including Nvidia (NASDAQ:NVDA), Alphabet (NASDAQ:GOOG) (NASDAQ:GOOGL), and Apple (NASDAQ:AAPL), have driven a significant share of the S&P 500's recent gains, reflecting renewed concentration in the market rally.

Shares of Nvidia and Apple have gained ...