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NewslettersCEO Daily

Investors are still betting on AI, but doubts are piling up

Diane Brady
By
Diane Brady
Diane Brady
Executive Editorial Director
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Diane Brady
By
Diane Brady
Diane Brady
Executive Editorial Director
Down Arrow Button Icon
October 22, 2026, 5:25 AM ET
Anthropic CEO Dario Amodei looks on as President Donald Trump holds a press briefing with AI executives on Sept. 29, 2026 in Washington, DC.
Anthropic CEO Dario Amodei looks on as President Donald Trump holds a press briefing with AI executives on Sept. 29, 2026 in Washington, DC. Finn Gomez/Getty Images
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  • In today’s CEO Daily: The AI consensus is starting to crack.
  • The big leadership story: The race to fix major security flaws.
  • The markets: Down globally as oil rises and investors weigh Meta and Tesla earnings.
  • Plus: All the news and watercooler chat from Fortune.

Good morning. For years, investors in both public and private markets have had one answer to almost every question: AI. About two-thirds of S&P 500 returns since 2024 have come from 42 AI stocks and almost all of the venture dollars this year are flowing into AI, with some firms nearing trillion-dollar valuations. The consensus may be starting to crack amid worries about valuations, financing, infrastructure costs, and the speed of adoption. In speaking with investors at Alpha Partners’ AlphaMarket 2026 conference yesterday, I heard themes that reinforce what business leaders are also telling me.

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The short-term risks are real. Former Defense Secretary Donald Rumsfeld used to talk about the known knowns, the known unknowns and the unknown unknowns. The first category is what we know to be true: from America’s aging workforce and rising debt to the transformative potential of AI. The last includes those black-swan events that come out of left field and test a company’s resilience, from war to pandemics. But the middle category is where investors play the odds when it comes to risks. They know that the AI boom is being financed on borrowed money, with circular financing deals that only add to the fog. They know the buildout is expensive and could take decades to pay off; that wild swings in revenue estimates and reports of rogue AI are red flags. And companies like CoreWeave can’t rack up $52 billion in liabilities without a clear path to pay it back. A good long-term bet can be derailed by the reality of right now. As one fund manager put it: “The costs of AI will come down and adoption will go up. We just don’t know when.”

Public and private markets are different. Private investors can sometimes trade their shares, but the market is less liquid, with the payoff coming when a company is sold, taken public, or raises a new round of funding. The wait times for those exits are getting longer, from the 33,575 unsold PE-backed firms that PitchBook reported as of June 30—more than double a decade earlier—to VC funding rounds that now stretch to Series G. (Bring on H, I and J!) The best deals go to a few firms, with others given a sliver at frothy valuations or locked out until an IPO. And investor panic plays out differently. As Forge Global CEO Kelly Rodrigues recently told me, the falling prices and other fears that spur public-market trading tend to slow activity in his secondary marketplace as “sellers don’t want to mark down assets and buyers wait for discounts.”

Consumer sentiment matters. The American consumer, who accounts for about 70% of GDP, continues to buy stuff, but many are stressed by energy prices, wage stagnation, rising interest rates, and an affordability crisis in everything from health care to housing. Most Americans don’t want more data centers and think AI is developing too fast. They’re worried about their jobs, don’t trust AI leaders, and think the playing field is unfair. And they’re about to vote in the midterms.

Anthropic is the test. The Anthropic IPO could be a barometer for sentiment across public and private markets. Anthropic has set up a public benefit fund for 5% of the shares and just hired a Harvard astrophysicist to the trust that controls its board. CEO Dario Amodei has to convince the public that his company is a good buy and he’s a good guy. A tepid debut wouldn’t just hurt Anthropic and its backers, it could set back other AI companies hoping to raise capital.

Contact CEO Daily via Diane Brady at diane.brady@fortune.com

Top leadership news

Researchers race to fix major security flaws found with AI

Researchers using AI discovered two critical flaws in PHP, software used across much of the web, prompting an emergency patch as attackers began trying to exploit them. Cybersecurity experts told Fortune that unpatched systems could let hackers run code remotely, which puts websites and sensitive data at risk.

Meta’s revenue rises, but AI spending pushes cash flow below zero

Meta’s quarterly revenue rose 26% to $64.6 billion, beating Wall Street expectations, though legal settlements weighed on operating profit. Shares rose as much as 5% after hours as investors welcomed early adoption of its Muse AI assistant and plans from the company to start generating revenue from it.

A SpaceX-Tesla merger could cost shareholders

Investors have welcomed a possible SpaceX-Tesla merger, but Fortune analysis argues that buying Tesla would give SpaceX little additional profit while straining its cash needs. Assuming a 30% takeover premium, SpaceX would pay nearly $2 trillion in stock, leaving Tesla’s shareholders with almost half the combined company.

The markets

S&P 500 futures are down 1.10% this morning. The last session closed up 0.58%. The STOXX Europe 600 was down 1.09% in early trading. The U.K.’s FTSE 100 was down 0.60% in early trading. Japan’s Nikkei 225 was down 2.65%. South Korea’s KOSPI was down 3.52%. China’s CSI 300 was down 1.84%. Hong Kong’s Hang Seng was down 3.03%. India’s NIFTY 50 was down 0.68%. Bitcoin is down at $82k.

Around the watercooler

Zuckerberg told Meta directors he might leave California, where he could lose billions to a wealth tax. Meta answered with a new class of stock by Amanda Gerut

Amazon abandons $427 million GW campus data center plan and pledges land donations worth $65 million instead by Joshua Hong

GM simulated 300,000 EV battery designs—using 34,000 years of computer time—before building a single cell. Now comes the physical part by Nick Lichtenberg

‘You’re no longer an influencer … you’re a cofounder’: MrBeast’s business resembles a Fortune 500 holding company, investor Steven Bartlett says by Sasha Rogelberg

America’s national debt plan is ‘clearly not in order,’ says Ken Griffin. He believes part of the problem is Europeans who ‘don’t want to go to work’ by Eleanor Pringle

CEO Daily is curated and edited by Joseph Abrams, Jason Ma, Claire Zillman, and Lee Clifford.

This is the web version of CEO Daily, a newsletter of must-read global insights from CEOs and industry leaders. Sign up to get it delivered free to your inbox.
About the Author
Diane Brady
By Diane BradyExecutive Editorial Director
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Diane Brady writes about the issues and leaders impacting the global business landscape. In addition to writing Fortune’s CEO Daily newsletter, she co-hosts the Leadership Next podcast, interviews newsmakers on stage at events worldwide and oversees the Fortune CEO Initiative. She previously worked at Forbes, McKinsey, Bloomberg Businessweek, the Wall Street Journal, and Maclean's. Her book Fraternity was named one of Amazon’s best books of 2012, and she also co-wrote Connecting the Dots with former Cisco CEO John Chambers.

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