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Is AI ‘one big bubble’? Behind the tech sell-off

The tech-heavy Nasdaq stock index has lately been on a roller coaster.
Chris Hondros / Getty Images / Hulton Archive
The tech-heavy Nasdaq stock index has lately been on a roller coaster.

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A wave of selling in tech stocks is starting to reflect doubts over whether the spending boom on artificial intelligence is worth it.

The best-known AI-related tech stocks, Nvidia and Google-parent Alphabet, were down for a second day in a row.

Among the biggest losers on Tuesday, however, was chipmaker Micron Technology, whose shares plummeted over 13%. These sell-offs sent the tech-heavy Nasdaq index down over 2%.

Micron’s stock is the perfect representation of what’s going on in the stock market. It has skyrocketed in value in the past year — up close to 800% — on soaring demand for memory chips from the AI build-out, showcasing the massive valuations for AI-related stocks.

“The market just continues to oscillate between ‘AI is going to be great and increase productivity and all these companies are going to win’ and ‘AI is a big waste of time and it’s not worth the return on investment at all and this is all one big bubble,'” said Gil Luria, head of technology research at investment firm D.A. Davidson.

Over $1 trillion spent. “Are we going to start to see returns?”

Spending on AI has been monumental. According to Stanford University’s AI Index Report, there was more than $580 billion in corporate investment into AI in the past year across the globe, on top of over $1 trillion in the four preceding years.

These doubts have led to jitters in the stock market. On Monday, Alphabet stock fell 5%, and SpaceX dropped 16%.

That nervousness spilled over into markets in Asia. Korean markets were the worst hit after stocks of Samsung and its competitor SK Hynix fell 12% apiece.

This comes at a moment when two of the largest AI companies, OpenAI and Anthropic, are considering selling their stocks to the market in what is shaping up to be two of the largest initial public offerings in history.

Both OpenAI and Anthropic are now generating revenue, but the long-term profitability of generative AI is an open question.

“The market is trying to kind of digest all this and saying, ‘Are we going to start to see returns?'” said Mark Vena, CEO of SmartTech Research.

On Tuesday, it was a rout of chipmaker stocks. Intel and Advanced Micro Devices were both off around 6%.

Micron took the biggest beating, however, mostly over nervousness ahead of the company’s results expected on Wednesday. Analysts say they’re watching Micron’s earnings to look for signs that the AI investment cycle is continuing apace.

Copyright 2026 NPR

John Ruwitch is a correspondent with NPR's international desk. He covers Chinese affairs.

Ruwitch joined NPR in early 2020, and has since chronicled the tectonic shift in America's relations with China, from hopeful engagement to suspicion-fueled competition. He's also reported on a range of other issues, including Beijing's pressure campaign on Taiwan, Hong Kong's National Security Law, Asian-Americans considering guns for self-defense in the face of rising violence and a herd of elephants roaming in the Chinese countryside in search of a home.

Ruwitch joined NPR after more than 19 years with Reuters in Asia, the last eight of which were in Shanghai. There, he first covered a broad beat that took him as far afield as the China-North Korea border and the edge of the South China Sea. Later, he led a team that covered business and financial markets in the world's second biggest economy. Ruwitch has also had postings in Hanoi, Hong Kong and Beijing, reporting on anti-corruption campaigns, elite Communist politics, labor disputes, human rights, currency devaluations, earthquakes, snowstorms, Olympic badminton and everything in between.

Ruwitch studied history at U.C. Santa Cruz and got a master's in Regional Studies East Asia from Harvard. He speaks Mandarin and Vietnamese.

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