Semiconductors, AI and software. Dev Malhotra is a pen name; every Mostly Markets writer uses one.
Why it movedNebius fell 12.6%, CoreWeave 11.2% and Cloudflare 10.8% on Friday as worries about AI spending, sharpened by Amazon's and Intel's results, hit cloud and internet stocks.
Why it movedDell plunged 12.6% on Friday after Intel warned that a shortage of memory chips is choking PC demand, dragging HP and other hardware makers down with it.
Why it movedAMD, Arm and Qualcomm each fell more than 12% on Friday as Intel's weak forecast and new worries about AI spending set off a broad chip selloff.
EarningsSandisk's revenue rose 378% to $11.03 billion, beating the $10.69 billion Zacks consensus, and it set an 8-for-1 split. The stock was down 9.4% early Friday.
EarningsKLA's September-quarter revenue rose 29% to $4.14 billion, ahead of the $4.05 billion expected, and it guided to $4.7 billion for December. The stock rose 5.5% on Thursday.
EarningsAmphenol's sales rose 65% to $10.23 billion, beating the $9.44 billion expected, as IT datacom sales jumped 117%. The stock rose 3.5% on Wednesday and 1.4% on Thursday.
EarningsIntel beat on profit and grew data-center sales 78%, but guided Q4 revenue to $15.0–16.0 billion, short of the $17.07 billion expected. The stock plunged 19.6% after hours as of 5:20 p.m. ET.
Earnings previewAMD reports after the close on Tuesday, 3 November. Analysts expect revenue of about $13.1 billion, up 41%, and its forecast for the quarter when its Helios AI racks ramp up may matter more.
Earnings previewPalantir reports after the close on Monday, 2 November. Analysts expect revenue of $2.17 billion to $2.18 billion, up about 84% and above the top of its own forecast.
Earnings previewShopify reports before the open on Tuesday, 3 November. Analysts expect revenue of $3.70 billion to $3.74 billion, at least 30% more than a year ago, after a quarter that sent the stock up 17%.
Why it movedFortinet plunged 20.1% on Thursday after cutting its 2026 service revenue forecast to $5.15–5.17 billion, below the $5.2 billion analysts expected, despite a Q3 beat.
Why it movedServiceNow plunged 27.0% on Thursday after forecasting 18.5% growth in a key measure of future sales, slower than the 21% it just reported and below estimates.
Why it movedF5 plunged 20.4% on Wednesday, the worst S&P 500 stock of the day, after forecasting 8% to 9% growth and lower margins, and Piper Sandler cut it to Neutral.
Why it movedOracle soared 10.7% on Wednesday after its investor day targeted $225 billion or more in fiscal 2030 revenue and capped new outside funding at $20 billion.
Why it movedSandisk jumped 7.7% and Micron 5.9% on Wednesday after SK hynix posted its first quarter above 100 trillion won in revenue and said memory demand will outrun supply through 2030.
Why it movedFair Isaac plunged 13.2% on Monday, the S&P 500's worst performer, after Wells Fargo downgraded it over its decision to hold the price of its mortgage credit score at $10.
Our picksMicron, Nvidia and Vertiv grow fast and bring in more cash than they spend. CoreWeave more than doubled its revenue but burned $13.66 billion in a year building data centers.
Why it movedCrowdStrike soared 8.3% on Friday after an Evercore ISI survey found security budgets firming into year-end, two days after critical PHP flaws put web servers at risk.
Why it movedLam Research plunged 11.8% on Thursday after warning that short supplies of factory space and parts will limit chipmakers into 2027. KLA lost 9.5% and Applied Materials 8.2%.