U.S. equities split sharply on Nov. 2 as traders sold AI-linked semiconductor shares despite strong earnings across parts of the technology supply chain, signaling growing concern over the cost, timing and financial returns of the industrys enormous data-center buildout.
The Dow Jones Industrial Average rose 0.41% to 51,983, while the S&P 500 fell 0.51% and the Nasdaq Composite lost 1.07%. The Philadelphia Semiconductor Index dropped 3.3%, with declines concentrated among companies most exposed to AI hardware spending. Marvell Technology fell 12.72%, Intel dropped 8.8%, AMD lost 7.52% and Micron Technology declined 5.78%.
The selling came as corporate results continued to show rapid revenue growth in AI infrastructure, from chips and optical networking to electrical equipment and cooling systems. Markets nevertheless focused on whether the spending required to support that growth can produce returns quickly enough to justify elevated valuations.
Microsoft spending brings the cost debate into focus
Microsoft reported quarterly capital expenditures of $45.2 billion, about 30% higher than a year earlier. The figure was below the $51.7 billion expectation cited in the supplied material, and Microsoft shares fell 2.83% on the day.
Capital expenditure has become a central measure for companies building AI capacity because it captures the cost of servers, networking equipment, data centers and related infrastructure. Revenue from cloud and AI services can take time to catch up with those outlays, while depreciation, electricity, equipment purchases and research costs begin weighing on margins earlier.
Microsofts spending figure did not point to a retreat from AI infrastructure. Instead, it sharpened the debate over the pace of deployment and the period required for customers AI demand to translate into sustained returns on hardware-heavy expansion.
That debate spread quickly through semiconductor stocks, where expectations have increasingly incorporated years of strong demand for accelerators, memory, networking components and data-center systems.
Marvell-Lumentum deal tests fixed-share merger economics
Marvells proposed acquisition of optical-components maker Lumentum became the clearest example of how rapidly changing semiconductor valuations can reshape a transactions economics.
Under the announced agreement, Marvell would acquire Lumentum in an all-stock transaction. Each Lumentum share would be exchanged for 4.5 Marvell shares. The companies said the offer represented a premium of roughly 23.9% to Lumentums Oct. 28 closing price, before reports of deal discussions, and implied an enterprise value of about $115 billion.
Marvell shareholders are expected to own about 67% of the combined company, with Lumentum shareholders holding the remaining 33%. The companies expect the transaction to close in the first half of 2028, subject to shareholder and regulatory approval.
The market reaction exposed the risk built into a fixed exchange ratio. Marvell shares fell from $251.65 at the Oct. 28 close to $171.41 by Nov. 2, a decline of about 31.9% in three sessions. Since Lumentum holders would receive a fixed number of Marvell shares, the falling acquirer share price reduced the market value of their consideration and narrowed the originally stated premium.
The agreement includes a termination fee of up to $5.8 billion, while the companies are targeting more than $1 billion in annualized cost synergies. Those savings would need to offset the operational complexity of combining Marvells semiconductor business with Lumentums optical networking operations, which are positioned to benefit from rising data-center bandwidth requirements.
Lumentums latest results showed why Marvell is willing to pursue the deal. The company reported fiscal 2027 first-quarter revenue of $1.263 billion, up 136.5% from a year earlier, and adjusted earnings per share of $4.57, above the $4.21 expectation in the supplied material. Its adjusted gross margin reached 53.2%, compared with an expected 51.3%.
For the following quarter, Lumentum forecast revenue of $1.575 billion to $1.625 billion and disclosed new NPO and CPO project orders, referring to networking designs that place optical connections closer to switching and computing equipment. It also reported more than $5 billion in purchasing commitments. Lumentum shares nevertheless fell 18.59% on the announcement day, suggesting the merger terms and Marvells share-price slump outweighed a strong operating update.
Strong earnings fail to protect Apple and Palantir
Apple and Palantir Technologies offered separate examples of companies beating near-term expectations while facing a more demanding market response.
Apple reported fiscal fourth-quarter revenue of $114.48 billion, up 12% year over year and above the roughly $113.4 billion expectation cited in the supplied material. Earnings per share were $2.10, compared with an expected $1.99. iPhone revenue rose 17% to $57.58 billion, while services revenue reached a record $31.57 billion.
Apple shares still fell 1.83% on Nov. 2, putting its market value near $4.94 trillion, before declining by more than 3% in after-hours trading. The pressure centered on margins and expenses rather than demand alone. Gross margin slipped to 47.9% from 50.1% in the prior quarter, and Apple forecast holiday-quarter gross margin of 45% to 46%.
The company projected holiday-quarter operating expenses of $20.4 billion to $20.8 billion, 11% to 13% above the prior year, citing increased AI-related research and development. Its 7% to 10% holiday-quarter revenue growth forecast indicated continued expansion, but the cost profile gave traders less room to overlook margin compression.
Palantir reported third-quarter revenue of $2.313 billion, up about 96% year over year. U.S. commercial revenue rose 148% to $984 million, and adjusted earnings per share of $0.44 exceeded the $0.41 expectation cited in the material. The company raised full-year revenue guidance to between $8.530 billion and $8.534 billion.
Its shares fell 3.13% during regular trading and turned lower after a brief after-hours gain. The response reinforced a tougher standard across high-growth AI companies: accelerating revenue is being weighed against how much future growth is already reflected in share prices.
Infrastructure orders point to sustained physical buildout
The sell-off did not erase evidence that AI-related construction remains active beyond chip designers. Vertiv reported sales growth of 61%, organic order growth of 100% and adjusted free cash flow of $652 million, while raising full-year guidance. The company supplies power and thermal-management equipment used in data centers.
Eaton reported second-quarter sales growth of 21% year over year. Rolling orders in its Electrical Americas unit increased 41%, and electrical backlog rose 43%, indicating that demand is moving from planned projects into equipment orders across the power supply chain.
Attention next turns to AMDs third-quarter report, scheduled after the Nov. 3 market close. Expectations in the supplied material call for revenue of roughly $13.0 billion to $13.1 billion, up about 41.5% from a year earlier, and earnings per share of about $1.95.
Traders are likely to focus less on the quarterly numbers than on AMDs timing for MI450 accelerators and its Helios rack-scale system. A Susquehanna analyst forecast cited in the material estimated that MI450 and Helios production shipments began in September, with a larger ramp expected in the fourth quarter of 2026 and the first half of 2027. The estimate projected 2027 data-center GPU revenue of about $41 billion and total data-center revenue of about $74 billion.
The Nov. 2 trading showed that forecasts of future demand are no longer insulating AI hardware companies from scrutiny. Markets are asking for clearer evidence that data-center spending can translate into durable revenue, protected margins and cash generation before the next investment cycle begins.
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