The world’s largest semiconductor companies have lost about $1.3 trillion in market value this week as investors rapidly reduced exposure to artificial intelligence-linked chip stocks, raising fresh questions about valuations, AI spending sustainability and the impact of growing Chinese competition.
The selloff has hit the biggest beneficiaries of the AI boom, with investors who poured billions of dollars into semiconductor companies now reassessing whether recent gains have moved too far ahead of underlying earnings growth.
According to a CNBC analysis using FactSet data, 20 of the world’s most valuable chip stocks have shed $1.3 trillion in combined market capitalization since Friday’s market close.
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Nvidia led the losses, losing about $238 billion in market value. Memory chipmakers SK Hynix, Samsung Electronics and Micron Technology lost approximately $176 billion, $173 billion and $113 billion, respectively.
Other major casualties included Advanced Micro Devices, which shed about $110 billion, and Taiwan Semiconductor Manufacturing Company, which lost about $119 billion.
The decline marks a sharp reversal for a sector that has driven global equity gains over the past year on expectations that artificial intelligence would create a prolonged boom in demand for chips, data centers and advanced computing infrastructure.
The Philadelphia Semiconductor Index (SOX), which tracks 30 major U.S.-listed semiconductor companies, has gained 92% over the past 12 months, even after falling nearly 20% over the past month.
Analysts said the latest correction appears to be driven more by investor sentiment and positioning than by a deterioration in company fundamentals.
“This decline appears to be driven largely by sentiment rather than fundamentals,” said Michael Field, chief equity strategist at Morningstar.
“Numerous firms, including ASM and Samsung, have reported earnings that continue to show strong growth, with results generally beating estimates and many firms even raising forward guidance.”
However, Field noted that valuations had become stretched in parts of the semiconductor industry.
“So the recent declines in companies such as AMD and Micron have simply brought valuations back to more reasonable levels,” he said.
Asian Chip Stocks Extend Losses
The selloff continued across Asian markets on Wednesday, with semiconductor companies leading declines after another weak session for U.S. technology stocks.
South Korea remained at the center of the turmoil.
SK Hynix shares dropped 9.61% after falling more than 15% earlier in the session, despite reporting record quarterly revenue and profit. Investors focused instead on the company’s failure to exceed elevated market expectations.
Samsung Electronics fell more than 5%, while LG Innotek declined 10.89% and Seoul Semiconductor dropped 8.89%.
The weakness reflected concerns that AI-related semiconductor stocks had become overly crowded trades, particularly after months of aggressive retail and institutional buying.
“The ongoing deleveraging process in Korea and softer sentiment towards global technology stocks” have contributed to the recent weakness, said Kieron Poon, investment director of Asian equities at Aberdeen Investments.
However, he added that the volatility “has not changed our long-term positive view.”
Japanese chip stocks also suffered losses.
Kioxia Holdings dropped 13.85%, while Tokyo Electron declined 10.59%.
SoftBank Group, which has significant exposure to artificial intelligence through its investment in Arm Holdings, fell 6.95%.
TSMC, the world’s largest contract chip manufacturer, declined 3.51%.
European chip stocks were mixed, with ASML falling 1.77%, ASM International down 3.28%, while BE Semiconductor Industries gained 1.67%.
AI Financing Concerns Weigh On Sentiment
The latest market decline reflects broader investor concerns about whether the AI investment cycle can maintain its current pace.
Technology companies have committed hundreds of billions of dollars toward AI infrastructure, including advanced chips, data centers and cloud computing capacity. Investors have increasingly questioned whether those investments will generate sufficient returns and whether rising debt levels could pressure future profitability.
Recent advances by Chinese semiconductor companies have added another source of uncertainty. Investors have become concerned that China’s progress in developing domestic chip technologies could challenge the market position of established semiconductor companies, particularly as Beijing accelerates efforts to reduce dependence on foreign suppliers.
Despite the selloff, some investors view the decline as a correction rather than the beginning of a structural downturn. Aberdeen said the pullback has created opportunities to buy high-quality companies at more attractive valuations.
“The recent market pullback has brought valuations to more attractive levels, creating opportunities for us to add exposure to high quality businesses at more reasonable prices,” Poon said.
David Riedel, founder and president of Riedel Research Group, said the correction represents investors removing some excess enthusiasm from the AI trade.
“The recent pullback in AI-related chip stocks reflects investors giving back a little bit of the froth that was in the AI market,” Riedel told CNBC’s “Squawk Box Asia.”
While acknowledging concerns over AI financing and Chinese competition, he said “the market is healthy” and added that memory chipmakers “will be fine” but “just have to give back some of those sudden gains.”
Market Rotation Emerges
Not all technology stocks suffered. Chinese internet companies listed in Hong Kong moved higher, bucking the broader regional weakness.
Tencent gained 4.29%, while Meituan rose 2.05%. Alibaba Group, Baidu and Kuaishou Technology also traded higher.
The divergence is seen as an indication that investors are not abandoning technology broadly but are rotating away from the most expensive AI-linked semiconductor names after a historic rally.



