Three Years of AI Mania: How ChatGPT Reordered the Stock Market

Three years ago, OpenAI released ChatGPT, setting off a mania on Wall Street for all things artificial intelligence. And the stock market hasn’t been the same since.

Bets that the groundbreaking technology will reshape society have minted new market leaders, made an already concentrated S&P 500 Index even more top heavy, and left companies and industries considered at risk of being replaced by AI struggling to keep pace.

Yes, there are lingering concerns that the frenzy of spending tied to AI is unsustainable as big payoffs remain elusive. But investment in the technology has been the driving force behind the bull market in US stocks that began less then two months before ChatGPT debuted on Nov. 30, 2022 — and that doesn’t appear to be changing dramatically yet.

“Every bull market has a dominant theme, and the dominant theme of this bull market is technology and AI, and it really kicked off in earnest with the launch of ChatGPT,” said Keith Lerner, chief investment officer and chief market strategist at Truist Advisory Services. “If you believe we’re still in a bull market, which we do, you don’t want to give up too early on that leadership.”

Here’s a look at how AI has shaped the current market landscape.

Market Leaders

Expectations that the world’s largest technology companies would become the dominant players in AI helped revive Big Tech stocks that took a beating in 2022 amid falling profits and rising interest rates.

“Any time in history AI growth would have driven a lot of these stocks up,” said Michael Bailey, director of research at Fulton Breakefield Broenniman. “But it started at a level of low expectations that has made the AI wave seem even more impressive.”

S&P 500 Gains

The rally sparked by AI enthusiasm has been the chief driving force behind the S&P 500’s 64% jump since the chatbot’s release. The seven most valuable companies in the S&P 500 — Nvidia Corp., Microsoft Corp., Apple Inc., Alphabet Inc., Amazon.com Inc., Meta Platforms Inc. and Broadcom Inc. — are all major players in the technology and account for nearly half of the benchmark’s gains over that time, according to data compiled by Bloomberg.