Is the AI-driven stock market boom a bubble? Analysts are increasingly worried after a warning sign emerged in May: the S&P 500 closed at a record high, but just 20 of its 500 companies reached their own all-time highs. That narrow breadth mirrors the dot-com crash of the early 2000s, according to CNBC.
The rally's heavy dependence on a handful of mega-cap tech stocks—especially the so-called Magnificent Seven (Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia, and Tesla)—has intensified these concerns. Today, 13 companies have hit $1 trillion market caps, including semiconductor giants SK Hynix, Micron, Broadcom, and TSMC. In 2018, only Apple had achieved that milestone.
The pattern echoes the dot-com bubble, where a narrow set of internet stocks drove the broader market before collapsing. While AI enthusiasm has pushed Nvidia and others to staggering valuations, skeptics argue that the current rally may not reflect the health of the entire economy. Unlike the late 1990s, however, these megacaps generate substantial profits and dominate global markets.
What to watch: whether earnings growth from non-tech sectors can sustain the rally, or if a correction in overvalued AI stocks drags the market down. The next few quarters will test whether this is a paradigm shift or a speculative mania.