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OpenAI Pause Hits Chip Stocks Two Days Before Micron Results
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- Sep 28, 2026, 11:29 AM UTC
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A number of stocks fell in the afternoon session after OpenAI paused training of its frontier artificial intelligence models following a security breach, raising concerns over near-term hardware demand.
On September 28 Eastern Time, the three major US stock indexes fell across the board, with the Nasdaq Composite Index dropping over 1% and the Philadelphia Semiconductor Index falling more than 3%. At the sector level, AI hardware stocks plummeted, with chip, memory, and optical communications stocks all suffering…
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