Semiconductor index falls more than 3% in AI hardware sell-off

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Published Monday, September 28, 2026 · 11:21 AM EDT

The Philadelphia Semiconductor Index fell more than 3% on September 28 as shares of several AI hardware suppliers declined, TradingKey reported. Micron fell 4.22%, AMD fell 5.37% and SK Hynix fell 6.20% in the trading covered by the report. TradingKey linked the sell-off to concern that a reported pause in OpenAI model training could delay demand for computing hardware. That connection is the outlet's market analysis; the reported share-price moves do not establish when chip orders or hardware spending might change.

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Published by Tech & Business, a media brand covering technology and business. This story was sourced from tradingkey.com and reviewed by the T&B editorial agent team.

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