• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
FinanceAI

Morgan Stanley just compared the ‘bubble-like euphoria’ over A.I. to the investing manias of the past century. The lesson for investors: Don’t ‘rush in’

Will Daniel
By
Will Daniel
Will Daniel
Down Arrow Button Icon
Will Daniel
By
Will Daniel
Will Daniel
Down Arrow Button Icon
August 10, 2023, 6:06 PM ET
Wall Street is undergoing A.I. euphoria.
Wall Street is undergoing A.I. euphoria. Spencer Platt—Getty Images

There’s clearly no shortage of hype surrounding the latest developments in artificial intelligence.  

Recommended Video

Ever since OpenAI’s ChatGPT chatbot rolled out to great fanfare in November, generative A.I. startups have raked in venture capital money like never before and stocks linked to the new technology have soared. But Edward Stanley, head of thematic research in Europe at Morgan Stanley, believes investors should be patient amid the “bubble-like euphoria.” 

The veteran analyst and his colleague Matias Ovrum recently compared the current “excitement” surrounding A.I. with 70 market bubbles over the past century to determine how investors should play the theme.

The pair believe in the long-term potential of A.I. In fact, they argued in a research note on Monday that the technology will be “transformational across industries” and “one of the most prominent secular investment themes over the coming decade.” But given the run-up in A.I.-linked equities this year—most notably chipmaker Nvidia, which has seen its stock soar nearly 200% year to date—Stanley and Ovrum don’t want to be “ignorant to the tactical debates” about elevated valuations and the legs of the current hype cycle.

Based on his research into past market bubbles, including the likes of the dotcom bubble and the post-COVID “everything bubble,” Stanley said that investors should be careful buying high-flying A.I.-linked stocks this year.

“History has shown that for multiyear themes—which we believe this is—there is usually little need for investors to rush in,” the veteran analyst wrote in emailed commentary to Fortune. 

In the short term, the A.I. hype is just a Keynesian beauty contest

When it comes to A.I.-linked stocks, Stanley warned, the short-term outlook might not be that bright based on historical evidence, even if the long-term potential of the underlying technology is clearly there.

“Hype around Search in the late 1990s, for example, was ultimately warranted. However, investors could have waited until 2003 to have a better understanding of who the likely winners would be and still capture >90% of the equity upside, and with greater downside protection,” he noted.

In their analysis of market bubbles over the past 100 years, Stanley and Ovrum found that the recent run-up in Nvidia and U.S. large-cap tech stocks owing to A.I. has been even more dramatic than average. “If we use Nvidia or U.S. large-cap tech as the proxy—tactically this rally would be in its later-innings,” they warned. 

In describing the recent market euphoria for A.I., the Morgan Stanley analysts pointed to British economist John Maynard Keynes’s beauty contest analogy.

Introduced in chapter 12 of his 1936 book, The General Theory of Employment, Interest, and Money, Keynes described a beauty contest held by a London newspaper in which participants were asked to pick the most beautiful woman from 100 photographs. The wrinkle to the game was this: Any voter who selected the most popular choice would be given a cash reward. 

Keynes argued that most voters in this type of beauty contest wouldn’t pick the woman that they, personally, thought was the most beautiful. Instead, hoping to win some cash, they’d pick the woman who they believed the group of voters as a whole would choose as the most beautiful. Or more sophisticated voters might even take things a step further and attempt to anticipate “what average opinion expects the average opinion to be,” he explained.

Keynes believed this type of herding behavior is often seen in markets and is one of the reasons bubbles form. Investors will purchase a stock based purely on their perception that other investors will buy the same stock, instead of any fundamental analysis. Morgan Stanley’s analysts argued this “annual beauty contest” is feeding into the current A.I. stock market boom.

The euphoric rise in A.I. stocks, coupled with a recent slowdown in “needle-moving A.I. product releases,” implies “some tactical caution on the theme by investors is warranted in the second half of the year,” Stanley told Fortune. 

Over the long term, it’s got potential

Investors certainly need to be careful over the short term when it comes to A.I.-linked stocks, but over the long term, it’s a different story. A.I. remains the decade’s top investing theme.

In his Monday research note, Stanley explained there are steady “signs of consumer and enterprise ‘stickiness’ versus prior hype cycles” and that user adoption of open-source A.I. models has been impressive.

At the leading repository of open-source A.I. models, Hugging Face, the top 100 models were downloaded 3.5 billion times since January 2021. “The breadth and depth of trial and error in trying to build the killer apps on top of these models is still in the exponential phase,” Stanley said of the data.

To determine the long-term potential of A.I.-linked stocks amid the development of A.I. tech, Stanley and Ovrum compared the past rise of bubbles to the much more modest year-to-date jump of A.I. indexes in 2023.

“Bubbles tend to rally a median 154% in the three years pre-peak; 217% on average. The first derivative A.I. winners have rallied over 200% YTD [year to date], yet broader A.I. indices are up a more modest 50% YTD and not yet above prior 2021 highs,” they explained, arguing that “stickiness and breadth of diffusion set A.I. apart from prior hype cycles.”

Over the long term, Stanley told Fortune, the more modest run-up in A.I. stock indexes versus past bubbles means that A.I. remains “one of the most attractive secular themes in the market”—investors just need to be careful when and where they put their money to work.

Join us at the Fortune Workplace Innovation Summit May 19–20, 2026, in Atlanta. The next era of workplace innovation is here—and the old playbook is being rewritten. At this exclusive, high-energy event, the world’s most innovative leaders will convene to explore how AI, humanity, and strategy converge to redefine, again, the future of work. Register now.
About the Author
Will Daniel
By Will Daniel
LinkedIn iconTwitter icon
See full bioRight Arrow Button Icon

Latest in Finance

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Finance

 The world’s 500 richest people made more than a quarter trillion yesterday as volatile markets react to fragile Iran war ceasefire
EconomyBillionaires
 The world’s 500 richest people made more than a quarter trillion yesterday as volatile markets react to fragile Iran war ceasefire
By Jacqueline MunisApril 9, 2026
44 minutes ago
Only five ships crossed the Strait of Hormuz Thursday, far below Iran’s pledge as negotiations begin
EnergyIran
Only five ships crossed the Strait of Hormuz Thursday, far below Iran’s pledge as negotiations begin
By Eva RoytburgApril 9, 2026
3 hours ago
7 best debt relief companies 2026
Personal FinanceLoans
7 best debt relief companies 2026
By Joseph HostetlerApril 9, 2026
3 hours ago
iran
EnergyFood and drink
A global food emergency: Why the closed Strait of Hormuz puts half the world’s calories at risk
By Aya S. Chacar and The ConversationApril 9, 2026
5 hours ago
Willie Walsh, wearing a blue suit, looks to his right with his mouth slightly open.
EnergyAviation
Jet fuel supply disruptions are comparable to 9/11 and could take months to replenish even if Hormuz Strait is reopening, airline trade group warns
By Sasha RogelbergApril 9, 2026
5 hours ago
erewhon
EconomyFood and drink
Americans hate the economy so much, they’re buying $22 smoothies
By Yuanyuan (Gina) Cui, Patrick Van Esch and The ConversationApril 9, 2026
5 hours ago

Most Popular

U.S. government is spending $88 billion a month in interest on national debt—equal to spending on defense and education combined
Economy
U.S. government is spending $88 billion a month in interest on national debt—equal to spending on defense and education combined
By Fortune EditorsApril 9, 2026
11 hours ago
The U.S. had a national debt ‘home run’ in its grasp, says Jamie Dimon. But the government did nothing, and now its best option is crisis management
Economy
The U.S. had a national debt ‘home run’ in its grasp, says Jamie Dimon. But the government did nothing, and now its best option is crisis management
By Fortune EditorsApril 8, 2026
1 day ago
2 years ago, Saudi Arabia quietly canceled the ‘petrodollar’ deal with America that wired the world economy for 50 years. Then war broke out in Iran
Energy
2 years ago, Saudi Arabia quietly canceled the ‘petrodollar’ deal with America that wired the world economy for 50 years. Then war broke out in Iran
By Fortune EditorsApril 7, 2026
2 days ago
Self-made billionaire MrBeast says his work-life balance is nonexistent and calls it a ‘miracle’ if he works less than 15-hour days: ‘I live to work’
Success
Self-made billionaire MrBeast says his work-life balance is nonexistent and calls it a ‘miracle’ if he works less than 15-hour days: ‘I live to work’
By Fortune EditorsApril 8, 2026
1 day ago
Gen Z workers are so fearful AI will take their job they’re intentionally sabotaging their company’s AI rollout
AI
Gen Z workers are so fearful AI will take their job they’re intentionally sabotaging their company’s AI rollout
By Fortune EditorsApril 8, 2026
1 day ago
MacKenzie Scott's latest donation takes her HBCU giving to well over $1 billion
Success
MacKenzie Scott's latest donation takes her HBCU giving to well over $1 billion
By Fortune EditorsApril 7, 2026
2 days ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.