AI Capital Rotates into Memory Chips as Mag7 Dominance Unravels
N.R. Finch
AI trade capital is rotating from compute giants like Nvidia toward memory chipmakers Micron and Sandisk; the Philadelphia Semiconductor Index is up 82% in 2026 while the Mag 7 basket has gained just 1.1% — market leadership is changing hands.
Why are the Magnificent Seven suddenly lagging?
The Nasdaq 100 is up roughly 18% in 2026, the S&P 500 about 10%, yet the Mag 7 index has gained only 1.1%.
The 40-day correlation between Mag 7 and the Nasdaq 100 dropped from 0.95 in April to below 0.7 — the lowest since 2017. This means → the broader rally is no longer driven by these seven stocks; the market has found new leaders.
DataTrek Research co-founder Jessica Rabe noted that big tech's co-movement with the S&P 500 is "comparable to 2015, when these stocks made up just 10–11% of the index" — yet Mag 7 still accounts for roughly one-third of the S&P 500 today.
Where is the money going?
In June, investors pulled $786 million from the Roundhill Magnificent Seven ETF — the largest single-month outflow on record.
Over the same period, the Roundhill Memory ETF drew $9.3 billion in inflows. In plain terms = money isn't leaving the AI trade — it's switching lanes, moving from "the companies spending on compute" to "the companies selling memory chips."
Deutsche Bank strategists said large-tech positioning hit "extreme" levels at end-May and has since "returned to a more neutral state."
Why are investors losing faith in Mag 7?
Microsoft, Amazon, Alphabet, and Meta are accelerating capex sharply, but return on that investment remains unclear and cash flow is under pressure.
Microsoft is down 20% year-to-date in 2026; June was its worst single month since 2000.
Brian Barbetta, co-head of the tech team and co-portfolio manager of the global innovation strategy at Wellington Management, said the Mag 7 used to be among the few places delivering earnings growth well above the market. "Now people are more focused on the reasons not to own them." He added that the market is debating whether cloud companies' return on capital and margins will face pressure.
How did even Nvidia get left behind?
Nvidia is up just 4.9% in 2026, ranking third from the bottom among Philadelphia Semiconductor Index constituents.
The SOX index itself is up 82% year-to-date, on track for its best year since 1999, and just closed its strongest quarter ever. This means → the memory-chip rally is "running largely independent of Nvidia."
Barbetta noted that investors chase the strongest growth and returns; right now Micron and Sandisk offer faster earnings growth and the strongest upward earnings revisions.
What went wrong at Meta?
CEO Mark Zuckerberg reportedly told a company-wide meeting that AI agent development "has not accelerated as expected."
Meta is also reportedly planning a cloud-infrastructure business to sell excess compute capacity. In plain terms = the company built more compute than it can use and now has to resell it — which itself signals that AI spending returns haven't kept pace.
Can this rotation last?
JPMorgan strategist Nikolaos Panigirtzoglou argued that as hyperscale cloud providers and AI-model companies improve commercialization, revenue, and earnings, the gap will eventually narrow and Mag 7 will reclaim a share of the AI value chain.
Morgan Stanley's chief U.S. equity strategist Mike Wilson was blunt: "This divergence cannot persist — it is unsustainable."
Whether chip-stock momentum has already peaked will be the key test for markets in the second half. This reflects a fundamental split on Wall Street over whether the "memory chips take over the AI trade" narrative holds.
Content is for reference only, not financial advice.