The Nasdaq Composite is up 1.4% Monday. The S&P 500 is up 0.6%. The Dow is flat. That spread — nearly a full percentage point separating the tech-heavy index from the broad market — is the real story of today’s session. And it is not an outlier; it is a pattern that has been reinforcing itself for months.
The mechanics are straightforward. AI-related capital expenditure continues to accelerate, and the companies selling the picks and shovels — NVIDIA, Super Micro, Broadcom — are seeing that demand translate directly into revenue and margins. The AI trade has graduated from concept to cash-flow story, and the market is rewarding it with premium multiples. NVDA alone now accounts for roughly 7% of the S&P 500 by weight. When it moves, the index follows.
The risk is obvious: concentration. The top five stocks in the S&P 500 now represent a share of market cap that is historically been associated with peaks — 2000, 2008, 2021. If the AI narrative falters on a macro shock or a capex pullback, the unwind would be violent. That is the counterpoint, and it is real.
Here is why I am not fading it yet: the companies in question are generating actual earnings growth to support the valuations. NVIDIA forward P/E has actually compressed this year as earnings have outpaced the stock price. That is a healthier setup than the 2021 trend where multiple expansion did all the work. The July earnings season is the next checkpoint — if the AI cohort delivers another beat-and-raise cycle, this rally has more room to run.
