U.S. Major Indices Open Lower, Philadelphia Semiconductor Index Drops Nearly 5%
Claire Weston
All three major U.S. indexes fell at the open, with the Philadelphia Semiconductor Index dropping nearly 5% to lead the decline — memory-chip stocks took the hardest hit, signaling concentrated concern over semiconductor demand.
How far did the three indexes fall?
The Philadelphia Semiconductor Index dropped 4.92% to 13,254.92, far outpacing other benchmarks.
The Nasdaq 100 fell 1.81%; the Nasdaq Composite slid 1.31%, showing broad tech pressure.
The S&P 500 lost 0.76% to 7,301.35; the Dow shed 0.40% to 51,712.50 — blue chips held up better.
This means → selling pressure was not broad-based but concentrated along the semiconductor chain: the closer to chips, the steeper the fall.
Which semiconductor names fell hardest?
Memory led the decline: SanDisk fell 7.84%, Micron 6.63%, Western Digital 6.35%, extending pre-market weakness.
Other major chip stocks dropped across the board: AMD −5.11%, Intel −4.59%, TSMC −3.31%, Broadcom −2.63%, Nvidia −2.01%.
This means → memory stocks fell nearly three times as much as Nvidia, suggesting the market's top worry is traditional storage demand, not AI compute.
Why did optical-communication stocks get dragged down too?
Marvell Technology fell 4.97%, Coherent about 8%, Lumentum about 7%, Corning about 3%.
In plain terms = optical communications — the technology that moves data between data centers using light — sits downstream of chips. When chip-demand expectations weaken, the optical modules that carry chip data follow them down.
Did big tech hold up?
Declines were markedly smaller than in semiconductors: Alphabet −1.48%, Tesla −1.47%, Qualcomm −0.47%, Amazon −0.28%.
Some mega-caps bucked the trend: Meta +0.24%, Apple +0.32%, Microsoft +1.22%.
This reflects a rotation *within* tech — capital shifted away from hardware and chips and toward software and platform names.
How did Chinese ADRs perform?
Broadly weaker but losses were contained: Kingsoft Cloud −2.64%, XPeng −2.46%, Futu −2.37%, Baidu −2.30%.
Alibaba fell 1.80%, JD.com 1.67%, PDD 1.00%.
The Nasdaq Golden Dragon China Index dipped just 0.069%. In plain terms = Chinese ADRs were pulled lower by overall market sentiment, not by any China-specific bad news.
Content is for reference only, not financial advice.