Cathie Wood’s ARK Invest made some substantial changes to its portfolio on Tuesday, September 29, 2026. The investment firm reportedly purchased $81 million worth of Nvidia (NVDA) stock, while selling about $110 million worth of AMD shares. Let’s discuss why ARK Invest may have decided to reshuffle its portfolio.

Why Did Ark Invest Sell AMD And Purchase More Nvidia Stock?

According to reports, ARK bought 356,681 shares of Nvidia (NVDA) across four of its ETFs (Exchange Traded Funds). The purchase comes on the heels of Nvidia’s board expanding its share-repurchase authorization by $150 billion. The move brought the capacity to a total of $235 billion through fiscal 2028. Many analysts are viewing the expansion as a vote of confidence from the board.

While ARK increased its Nvidia (NVDA) exposure, it has drastically reduced its Advanced Micro Devices, Inc (AMD) holdings. The investment firm sold 181,767 shares of AMD across four ETFs.

Nvidia’s (NVDA) stock value has risen by about 22% in 2026. AMD, on the other hand, has risen by about 184% in the same time frame. It is possible that ARK is booking its AMD profits, while expecting Nvidia to deliver bigger gains for the rest of the year.

Also Read: Wells Fargo, Bank Of America Raise AMD Stock Price Target

Both Nvidia (NVDA) and AMD have been among the biggest gainers of the AI boom. Nvidia (NVDA) is the clear market leader, with its market cap hitting an all-time high of $5.56 trillion in September 2026. AMD also saw incredible gains last month, with stock price hitting a peak of $615.52, with its market cap finally breaching the $1 trillion.

Nvidia (NVDA) and AMD are expected to continue its upswing, with Wall Street analysts growing increasingly bullish on both companies. However, many analysts worry about a potential AI bubble, the bursting of which could have severe consequences for the stock market.

Nvidia vs SpaceX is the matchup a lot of investors keep coming back to right now, especially after SpaceX’s biggest technical win yet. A Nvidia vs SpaceX stock comparison still puts Nvidia ahead on steady profits, while SpaceX stock trades mostly on where its AI hosting and orbital programs go next. Both companies count among the biggest AI stocks around, and a Nvidia vs SpaceX valuation check still favors Nvidia, even as Wall Street turns more bullish on SpaceX.

Also Read: SPCX Stock Surges as Mizuho and Morgan Stanley Turn Bullish

Nvidia vs SpaceX Valuation: Which AI Stock Has More Upside?

Nvidia’s market cap sits near $5.2 trillion, with shares around $212 and a trailing P/E ratio near 27.6x, a multiple built on real, growing earnings. SpaceX carries a valuation near $2 trillion, and SpaceX stock trades around $145 to $146 after slipping 2% on good news, with shares ranging $104.83 to $225.64 over the past year. Bank of America just raised the stakes on this Nvidia vs SpaceX valuation debate, with analyst Ronald Epstein backing a $235 SpaceX price target, about 60% above the reference price.

Nvidia’s Case In The Valuation Fight

In this Nvidia vs SpaceX matchup, Nvidia’s price comes down to its near-monopoly on the chips running today’s AI boom, from Blackwell to the newer Vera Rubin platform. Nvidia also just joined a $668 million round for GMI Cloud, an AI cloud firm, alongside South Korean backers like KB Investment, a sign of how far its money reaches beyond chips. That steady demand is why analysts treat Nvidia as the safer of the two AI stocks, even though its size limits the room left to grow.

Starship’s Orbital Win Boosts BofA’s SpaceX Call

SpaceX stock has swung hard since its June debut, and a Nasdaq rule fast-tracked the company into the Nasdaq-100 on July 7, forcing funds like the Invesco QQQ Trust to buy shares on behalf of millions of 401(k) savers. On Sept. 28, SpaceX pulled off its biggest technical win yet, sending Starship into orbit, deploying 26 Starlink V3 satellites, and landing the Super Heavy booster, yet SpaceX stock still fell 2% to $145.47 right after.

Anyone running a Nvidia vs SpaceX stock comparison on growth alone would probably lean toward SpaceX now, since Wall Street’s new target implies a lot more room to run.

What SpaceX And Nvidia Officials Are Saying

Executives on both sides have talked fairly openly about this Nvidia vs SpaceX partnership, and a few of their comments deserve a direct quote.

Elon Musk, SpaceX CEO, said:

“highly confident that SpaceX will be launching Nvidia VR NLV72 AI computers in space”

Jensen Huang, Nvidia CEO, said:

“Space computing, the final frontier, has arrived.”

Bret Johnsen, SpaceX CFO, said the company’s AI hosting deal gave management:

“even more conviction”

A Nvidia vs SpaceX stock comparison, at the time of writing, still favors Nvidia on steady earnings, but SpaceX stock just picked up a fresh vote of confidence from Bank of America right after Starship’s orbital debut. Nvidia’s lead among AI stocks looks safe for now, but SpaceX’s payoff looks closer than before.

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