Scared of an AI stock bubble? Then don't look at this chart.

And contiguous successful AI banal bubble-watching news…

Quick insight: AI banal attraction has reached the aforesaid level that resulted successful the bursting of erstwhile bubbles, Bank of America strategists pointed out.

The "AI Big 10" present marque up 41% of the S&P 500 (^GSPC), akin to the stock of tech and telecom during the dot-com bubble.

The 10 companies making up BofA's AI Big 10 are Nvidia (NVDA), Microsoft (MSFT), Alphabet (GOOG, GOOGL), Amazon (AMZN), Meta (META), Apple (AAPL), Tesla (TSLA), Broadcom (AVGO), Micron (MU), and Advanced Micro Devices (AMD).

The why: The Nasdaq Composite (^IXIC) delivered a blockbuster show successful the 2nd 4th of 2026, surging 21.4% to station its champion quarterly tally since the post-pandemic rebound of 2020.

The explosive maturation was chiefly fueled by an unrelenting concern roar surrounding artificial quality infrastructure. That propelled semiconductor hardware heavyweights specified arsenic AMD and representation suppliers similar Micron to grounds highs.

Momentum successful tech was further amplified by the mid-June IPO of Elon Musk's SpaceX (SPCX).

The tech-heavy scale did acquisition a insignificant 2.8% pullback successful June arsenic investors concisely rotated superior into tiny caps and disquieted astir Big Tech's AI superior expenditures.

Bottom line: If the bullish AI commercialized is going to beryllium tested, it volition travel successful the existent quarter.

For one, the drivers of the 2026 AI commercialized are present good known, lessening the likelihood of affirmative surprises erstwhile net play begins shortly. And much hawkish speech connected involvement rates from caller Fed Chairman Kevin Warsh is likely. That would beryllium unwelcome for high-multiple stocks successful the AI sector.  

"I deliberation the gains tin continue. But I deliberation that the communicative is going to alteration a small bit," Portfolio Wealth Advisors main concern serviceman Lee Munson said connected Yahoo Finance's Opening Bid. "This is little astir the net bubble successful Micron … But I deliberation investors are starting to speech astir wherefore we person the Magnificent Seven stocks becoming the Lag Seven — what are radical getting for buying each those pickaxes and shovels."

Brian Sozzi is Yahoo Finance's Executive Editor and a subordinate of Yahoo Finance's editorial enactment team. Follow Sozzi connected X @BrianSozzi, Instagram, and LinkedIn. Tips connected stories? Email [email protected].

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