TREE NEWS reports: The S&P 500 rose 2.3% for the week, the Dow gained 2.1% and the Nasdaq 100 climbed 3.7%, while the Philadelphia Semiconductor Index jumped 8.3% and the memory-chip index surged 10.2%. On Friday, the S&P 500 fell 0.4% and the Nasdaq 100 dropped 1.2%, with Nebius down 10% and AMD, CoreWeave, Cisco and SanDisk each losing at least 5.2%.
S&P 500 gains 2.3% for the week; Nasdaq 100 rises 3.7%
AI take
The week's leadership was narrow and unmistakably semiconductor-driven, with the memory-chip and Philadelphia semiconductor gauges outpacing the major averages by a wide margin — a sign that AI-infrastructure demand, not broad market breadth, carried the tape. Friday's pullback in Nebius, AMD, CoreWeave and SanDisk shows how quickly that leadership can reverse, with the same high-beta names that led the rally absorbing the sharpest losses. The open question is whether chip strength broadens into the wider index or remains a concentrated trade vulnerable to single-session reversals.
Generated by AI for reference only.
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