Philadelphia Semiconductor Index Falls 5% as Lumentum, GlobalFoundries Slide

Nov 4, 2026 11:06 ET · 3h ago

TREE NEWS reports: The Philadelphia Semiconductor Index extended its decline to 5%, with Lumentum dropping 11.3%, GlobalFoundries falling 8%, Seagate Technology down 7.9%, Teradyne down 7.8% and Amphenol down 7.3%. Western Digital fell 7%, while Skyworks and Micron each lost 6.9%, and SK Hynix and Kioxia ADRs each dropped 5.6%. ASML slipped 4.1%, TSMC 2.6%, Broadcom 3.1% and Nvidia 2.5%.

Original source

AI take

The breadth of the selloff is the story: declines span optical components, foundry, storage and equipment names rather than concentrating in a single subsector, which points to a sector-wide repricing rather than an idiosyncratic hit to one company. Memory-linked names like Micron, SK Hynix and Kioxia moving alongside equipment bellwethers ASML and TSMC suggests the pressure is cutting across the supply chain. Whether the weakness stays confined to semiconductors or spills into adjacent hardware and AI-adjacent trades is the open question worth watching.

Generated by AI for reference only.

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