Daily Top-10 Movers

Prices are Monday, October 26, 2026 closes at 4:00 PM EDT. Ranked by absolute price change among semiconductor stocks with market cap ≥$5B.

★ highlighted = today’s news-driven movers.

Amkor Guides to $1.9 Billion to $2.0 Billion After a Revenue Slip as Rambus Posts Record Sales

• Amkor Technology reported third-quarter net sales of $1.99 billion, gross margin of 18.3% against 14.3% a year earlier and diluted EPS of $0.76, and guided the fourth quarter to $1.9 billion to $2.0 billion in sales and $0.65 to $0.75 in EPS, per the company’s SEC filing (October 26); full-year capital spending is now about $2.5 billion. Why it matters: sales landed just under the low end of the July guide of $2.0 billion to $2.1 billion, per MarketBeat, and the shares closed Monday at $36.81, down 6.34%, then traded at $38.00, up 3.23%, in premarket, per StockAnalysis, so on ChipSentinel’s reading margin expansion is outweighing the revenue slip for now.
• Rambus reported record third-quarter revenue of $218.3 million, with product revenue of $114.3 million and non-GAAP EPS of $0.84, and guided the fourth quarter to $227 million to $233 million in revenue and $0.84 to $0.92 in non-GAAP EPS, per the company’s SEC filing (October 26). Why it matters: revenue was up about 22% from $178.5 million a year earlier, per TradingKey, and the shares traded at $91.15, up 0.92%, in premarket after closing Monday at $90.32, per StockAnalysis, and because the 5.45% Monday gain came before the release, on ChipSentinel’s reading Tuesday’s session is the first market reaction for the memory-interface and IP supplier.

Seoul Surges as SK Hynix Gains 5.18% and Samsung 4.23% While Musk and Huang Split on Supply

• The Kospi closed up 3.09% at 5,638.34 on Tuesday, with SK hynix up 5.18% and Samsung Electronics up 4.23% as foreign investors turned net buyers of about $447 million, per The Herald Business (October 27), which tied the rally to reports about Anthropic’s filing. Why it matters: SK hynix reports Wednesday, and Daishin Securities’ Lee Kyung-min said expectations for supply-demand improvement have strengthened, per MoneyToday, so on ChipSentinel’s reading the Seoul gain raises the bar for a print; the New York listing traded at $147.00, up 3.07%, in premarket, per StockAnalysis.
• Elon Musk predicted Chinese chipmakers will produce large volumes of RAM from 2028, while Nvidia’s Jensen Huang argues memory supply is unlikely to exceed demand even by 2029, per Korea JoongAng Daily (October 27). Why it matters: Semicon Research Lab CEO Roh Geun-chang called the hyperscaler borrowing behind AI buildouts "a cash flow problem, not a profitability problem," and ASML’s EUV capacity is expected to rise from 44 units in 2025 to more than 80 in 2027, so on ChipSentinel’s reading the supply debate now turns on tool output and Chinese yields rather than on 2026 pricing.

Applied Materials Lifts Its Besi Stake to About 20% as Infineon Funds a $1.23 Billion GaN Fab

• Applied Materials will raise its stake in BE Semiconductor Industries to about 20% through an accelerated share purchase agreement, with delivery subject to the expiry of the U.S. Hart-Scott-Rodino antitrust waiting period, per the company (October 26). Why it matters: Applied says it has no current plan to exceed about 20% or to seek a directorship, the price was not disclosed, and the co-innovation list spans hybrid bonding, 3D chip scaling and thermo-compression bonding, so on ChipSentinel’s reading the stake is a bet on advanced-packaging tool demand rather than a control play.
• Infineon will invest about $1.23 billion through 2034 to build Europe’s first high-volume gallium nitride power-chip fab on 300mm wafers at Villach, Austria, with production by the end of 2027 and up to $0.36 billion of Austrian state aid approved under the European Chips Act, per Semiconductor Today (October 27). Infineon reports in euros; ChipSentinel converts all euro figures at about $1.12 per euro, the October 26 mid-rate per Pound Sterling Live. Why it matters: state aid covers about 29% of the investment by ChipSentinel’s arithmetic, and the spending positions a European power-chip supplier for data-center and industrial demand while peers such as Texas Instruments and NXP report strengthening industrial orders.

Fed Decision Wednesday Carries 12.7% Hike Odds as the 2-Year Yield Rises to 4.712%

• CME FedWatch showed 12.7% odds of a rate hike at Wednesday’s Federal Reserve meeting and more than 70% odds of one in December, while Kalshi priced more than 90% odds of a hold, per Capp Notes (October 26). Why it matters: the Philadelphia Semiconductor Index remains down 12.2% for October, and on ChipSentinel’s reading a hold with hawkish language would leave long-duration AI names exposed to the December hike pricing that Monday’s rally did not remove.
• The 2-year Treasury yield rose 3.2 basis points to 4.712% after a $69 billion auction that tailed by 0.3 basis points, the 10-year held at 4.987% and the 30-year slipped to 5.300%, with December Brent down 0.8% at $115.81, per Capp Notes (October 26). Why it matters: the 2s10s spread flattened to about 28 basis points, and a 10-year yield near 5% keeps the discount rate on semiconductor earnings elevated even as Alphabet and Microsoft report Wednesday, per Yahoo Finance.

SemiAnalysis Flags 2027 Memory and Logic Limits; Morgan Stanley Eyes a Mid-November Trough

• SemiAnalysis forecasts 43GW of data-center additions in 2027, a figure Altimeter’s Brad Gerstner called too aggressive in favor of about 25GW, and says memory and logic could become the main constraints in 2027 and 2028, per SemiAnalysis (background reading, published October 19); pre-leases typically run 15 to 20 years with total contract value of $30 billion to $50 billion per gigawatt.
• Morgan Stanley’s Mike Wilson team sees the semiconductor correction in its final stage with pressure easing by mid-November, but says chips could still fall another 10% to 15%, with the Philadelphia Semiconductor Index possibly finding support near 9,500, per Capp Notes (October 26); by ChipSentinel’s arithmetic, 9,500 is about 14% below Monday’s 11,083.47 close.

NXP Reports Tuesday After the Close, Then SK Hynix and the Fed on Wednesday

• Tuesday, October 27 — NXP Semiconductors reports third-quarter results after the close, with a call at 4:30 p.m. EDT, per the company.
• Wednesday, October 28 — SK hynix reports third-quarter results before 9:00 a.m. Seoul time and the Federal Reserve announces its rate decision, per SK hynix and Capp Notes.