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Cisco’s John Chambers lived through the dot-com crash. He says the AI bubble is harder to navigate

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
April 20, 2026, 6:04 AM ET
Cisco's John Chambers at Collision 2019 at Enercare Center in Toronto, Canada.
Cisco's John Chambers at Collision 2019 at Enercare Center in Toronto, Canada.David Fitzgerald/Sportsfile via Getty Images
  • In today’s CEO Daily: Diane Brady interviews John Chambers, who knows bubbles, about the AI boom.
  • The big leadership story: Kalshi and the SCOTUS case that could determine the future of gambling.
  • The markets: Down in Europe as tanker attacks threaten a fragile ceasefire.
  • Plus: All the news and watercooler chat from Fortune.

Good morning. Are we in a stock market bubble? If you go by the so-called Buffett Indicator, as my colleague Shawn Tully reminded readers in this piece yesterday, the answer is yes. The ratio of total stock market capitalization to GDP now stands at 232%, exceeding 1999 levels and the 200% threshold where Buffett said investors were “playing with fire.”

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But is today’s bubble comparable to what we saw during the dot-com boom from 1995 to 2000? For insight on that, I spoke yesterday with John Chambers, who was CEO of Cisco from 1995 to 2015. Under his watch, it became the most valuable company on earth, with a market cap of $576 billion in March 2000, dropping to a low of around $60 billion by October 2002. Today, it’s around $340 billion. For almost a decade, Chambers has bet big on AI through JC2 Ventures and continues to advise founders, government leaders, and CEOs on market trends. (I co-wrote a book with him and find his annual tech predictions prescient.) His take:

What’s similar: “The driving force was the internet, and growth was almost completely out of control. The limiting factor was supply chain: lead times stretched out and nobody wanted to cancel orders, which can disguise a lot of problems. The most valuable companies were the technology companies, and there was a 50% increase in (annual) productivity gains. I do see parallels there. AI will change the way we work, live, learn and play, just like the internet did, and it will drive productivity for the next decade and the decade after that. There will be bubbles, with dramatic winners and spectacular train wrecks.”

What’s different: “We’re in the very early innings of an endurance baseball game with 100 innings that’s moving at tremendous speed. We snuck up on IBM (which tried to control enterprise architecture as Cisco built an open network for different systems to work together). The Magnificent Seven are all investing big time in AI and investing fast. Nobody is sneaking up on anybody. Microsoft led early on, then Google, now Anthropic probably has the most momentum. Any company could go any way. These CEOs get that. The bell-shaped curve where 50% of companies are in the middle is flattening. Companies to the right will have tremendous valuations but a lot more companies are going to get destroyed than will move to the right.”

Net Net: “I think a portfolio approach makes sense. AI affects everything. If you try to bet on one or two companies, that’s a high-risk approach. I would bet on the U.S. and, more than ever, I’m also bullish on India. Europe is way behind. The Middle East was one area where I was optimistic, but events have slowed down opportunities there. China should have led in AI, but you cannot do it with a five-year plan or top-down control. You need personalities to drive innovation. AI is moving at five times the speed with three times the impact. For leaders, it’s going to make Andy Grove’s paranoia look conservative.”

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

Top leadership news

Kalshi’s seismic SCOTUS showdown

Prediction markets platform Kalshi is heading toward a potential Supreme Court showdown over whether its sports betting operations are legal. States and Native American tribes argue it's unlicensed gambling; Kalshi says its federal swap license preempts state authority. With circuit courts split, lawyers say a ruling—whose outcome they call a "jump ball"—could arrive as soon as next year.

Failure to launch

Men are nearly twice as likely as women to be living with their parents, and a new study says it’s particularly harmful for non-college educated men, who are less likely to hold jobs compared to their college-educated counterparts. As rents have surged across the U.S., more and more men are moving home, and once there, many stop working. In fact, 16% of non-college men now live with their parents, compared to 8% of college-educated men.

U.S. Treasuries are losing their ‘safety premium’

Soaring U.S. debt is causing Treasury bonds to lose their risk advantage over other securities, the International Monetary Fund warned. Treasuries have long enjoyed the status as the world’s top safe haven asset. But annual budget deficits are now at $2 trillion. “The increase in the U.S. Treasury security supply is compressing the safety premium that U.S. Treasuries have traditionally commanded—an erosion that pushes up borrowing costs globally,” the IMF said.

The markets

S&P 500 futures are down 0.52% this morning. The last session closed up 1.20%. The STOXX Europe 600 was down 1.13% in early trading. The U.K.’s FTSE 100 was down 0.59% in early trading. Japan’s Nikkei 225 was up 0.60%. China’s CSI 300 was up 0.61%. Hong Kong’s Hang Seng was up 0.77%. South Korea’s KOSPI was up 0.44%. India’s NIFTY 50 is up 0.28%. Bitcoin was at $75K.

Around the watercooler

The ultra-wealthy have a new favorite status symbol: From a $14.5 million guitar to an $812,500 bottle of wine, rare collectibles are on a tear by Phil Wahba

Parents are so panicked about the job market they’re paying career coaches $15,000 years before their kids graduate from college  by Jake Angelo

For wealthy buyers, Mar-a-Lago’s security perimeter is Palm Beach’s hottest amenity by Sydney Lake

Federal government launches broad probe into mysterious disappearances and deaths of top scientists. ‘We haven’t found anything alarming yet’ by Jason Ma

From drought to demand: Biotech IPOs roar back with Kailera and Alamar by Lily Mae Lazarus

CEO Daily is curated and edited by Andrew Wyrich, 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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