Shares under the Dow Jones U.S. Semiconductors Index lost more than US$500 billion in market value in a sell-off overnight (17th), blown by reports that the US was considering the most severe trade curbs to bar companies from exporting semiconductor technology to China, Reuters reported. Comments by the US Republican presidential candidate Donald Trump exacerbated the collapse of semiconductor stocks further.

Shares of Dutch semiconductor lithography maker ASML (ASML.US)      tumbled 13% in the US. AI semiconductor maker NVIDIA (NVDA.US)      slumped nearly 7%, losing more than US$200 billion in market cap, while its peers AMD (AMD.US)      and SoftBank's chip designer Arm (ARM.US)      each slipped about 10%. Memory semiconductor maker Micron (MU.US)      and communications semiconductor maker Broadcom (AVGO.US)      were down 6% and 8%, respectively. Mobile device semiconductor maker Qualcomm (QCOM.US)      tumbled nearly 9%. TSMC (TSM.US)      , the world's largest outsourced semiconductor maker, also plunged 8%. However, the US-based semiconductor stocks bucked the market trend, with GlobalFoundries (GFS.US)      up nearly 7% and Intel (INTC.US)      up 0.4%.

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The PHLX Semiconductor Index cascaded 6.8% at close, marking the biggest one-day drop since the new outbreak ignited market volatility. Nonetheless, the index has grossed surges of 30% YTD.
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