The Philadelphia Semiconductor Index dropped 3.1% on Wednesday, extending its worst sequence of losses since May 2025. Individual declines were led by Marvell, which fell 4.2%, while AMD, Intel and Applied Materials each saw shares decline by at least 3%.
Tuesday, October 20, 2026
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US Chip Stocks Lose $1 Trillion in Longest Slide Since May 2025
US Markets6 days ago
Concerns that artificial intelligence investments will not deliver returns as quickly as anticipated drove investors to shave 10% off the total market valuation of US chipmakers. This broad selloff wiped approximately $1 trillion from the combined value of the sector over six consecutive trading days.
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