Hundreds of billions in mergers and acquisitions lead to a double whammy, and the tech giants' earnings reports fall short of expectations: has Wall Street started to "nitpick"?

1. The Index Stabilized, But AI Stocks Started to Reassess

On November 2, U.S. stocks showed a striking divergence: the index declines were not extreme, but the sell-off within the AI industry chain was quite fierce. The Dow Jones Industrial Average rose 0.41% to 51,983 points, the S&P 500 fell 0.51%, the Nasdaq dropped 1.07%, and the Philadelphia Semiconductor Index decreased by 3.3% (closing report summary). Marvell fell 12.72%, AMD dropped 7.52%, Intel declined 8.8%, and Micron fell 5.78% (market interface, closing on November 2).

This does not mean that the market suddenly lost faith in AI demand. Microsoft's latest disclosed quarterly capital expenditure reached $45.2 billion, although lower than the market expectation of $51.7 billion, it still represented an approximately 30% increase compared to the same period last year. Microsoft's stock price still fell 2.83% that day (report summary). After several rounds of large-scale capital expenditures, investors are asking more specific questions: How long will the investment continue to grow? Can orders be sustained? Will new revenue cover depreciation, energy, equipment, and R&D costs?

The merger between Marvell and Lumentum has brought this discussion to the forefront. It is not only a large transaction but also a concentrated test for the market to reassess the return on investment in AI infrastructure.

2. $115 Billion to Buy Out Connectivity, the Market First Asks Who Will Bear the Costs

According to the announcements from both parties, Marvell will acquire Lumentum in an all-stock transaction, exchanging 4.5 shares of Marvell for each share of Lumentum, representing a premium of about 23.9% over the closing price before the trading rumors on October 28, with an implied enterprise value of approximately $115 billion. After the transaction is completed, Marvell's existing shareholders are expected to hold about 67% of the merged company, while Lumentum shareholders will hold about 33%. The transaction still requires approval from shareholders and regulatory agencies, and is expected to be completed in the first half of 2028 (company announcement and report summary).

From an industrial logic perspective, this transaction is not difficult to understand. Marvell provides high-speed electrical chips, including DSP and PHY, while Lumentum has laser arrays and photodetectors. The merger of the two companies means further integration of the industry chain from electrical signal processing to optical signal transmission. Marvell disclosed a potential market size of approximately $550 billion after the merger (report summary), and Lumentum's management previously stated that some component capacities have been booked until early 2029, with customers beginning to lock in longer-term orders (report summary).

However, while the industrial logic holds, whether the transaction price is reasonable is another question. Marvell chose to pay the entire consideration with its own stock, meaning that the premium received by Lumentum shareholders ultimately depends on whether Marvell's stock price can be maintained. Marvell's original shareholders will need to bear the risks of equity dilution, integration execution, and synergy falling short of expectations. The transaction is expected to be completed by the first half of 2028, meaning investors need to pay in advance for the operating results more than two years down the line.

More critically, Lumentum's financial report itself is not bad. In the first fiscal quarter of fiscal year 2027, revenue was $1.263 billion, a year-on-year increase of 136.5% (financial report interface revenue calculation, growth rate is report summary), adjusted earnings per share were $4.57, exceeding the market expectation of $4.21, and the adjusted gross margin was 53.2%, higher than the expected 51.3%. The company provided revenue guidance for the next quarter of $1.575 billion to $1.625 billion, also above market expectations, and disclosed new NPO/CPO project orders and procurement commitments exceeding $5 billion (report summary).

A company with rapidly growing revenue and profits and guidance better than expected saw its stock drop 18.59% on the day of the transaction announcement. The market's focus on the sell-off was not on Lumentum's current operational performance; it was concerned about the final consideration shareholders would receive after the transaction is completed and the risks they would bear in the future.

Marvell's own stock price changes more directly reflect this repricing. From a closing price of $251.65 on October 28 to a closing price of $171.41 on November 2, the cumulative drop over three trading days was approximately 31.9% (market interface daily calculation). Since the transaction uses a fixed exchange ratio, Marvell's stock price drop simultaneously depressed the stock value that Lumentum shareholders could receive, and the promised premium quickly shrank. The transaction has not yet been completed, but the market has already adjusted its price in advance.

Market concerns are concentrated in three areas: dilution caused by all-stock payment, the long timeline until 2028 for completion, and whether the synergy effects can truly be realized. The annualized cost synergy target proposed by both parties exceeds $1 billion; if the operational overlap between the two companies is limited, the potential for cost savings may not be as large as the transaction scale suggests (report summary). Regulatory approval is also a variable; Lumentum currently supplies to Marvell's competitors, and the transaction includes a termination fee of up to $5.8 billion (report summary), indicating that both parties are aware of the uncertainties in the approval and integration window over the next two years.

The most noteworthy aspect of this transaction is how much the market is willing to pay for future growth. Demand for AI infrastructure can continue to grow, but if companies need to achieve growth through large-scale equity payments, long-term integration, and high valuations, shareholders will demand higher return compensation.

3. Apple and Palantir: Good Results, Why Didn't They Translate to Good Stock Prices?

The merger transaction exposes the cost of capital allocation, while the financial reports of Apple and Palantir present a similar change from the profit and valuation perspective: the market is no longer just looking at how high the growth numbers are, but also considering what costs were incurred behind the growth and whether the actual results exceed the expectations already priced into the stock.

Apple's revenue for the fourth fiscal quarter was $114.48 billion, a year-on-year increase of 12%, exceeding the market expectation of approximately $113.4 billion, with earnings per share of $2.10, surpassing the expected $1.99 (financial report interface revenue and earnings per share calculation, expectations are report summary). iPhone revenue was $57.58 billion, a year-on-year increase of 17%, and service revenue was $31.57 billion, setting a new record (report summary). Looking solely at revenue and profit numbers, this is a quite strong financial report.

However, the stock price did not provide a corresponding reward. Apple fell 1.83% on November 2, with a market value dropping back to around $4.94 trillion, and after-hours trading saw a drop of over 3% (market interface and report summary). The market's focus was on gross margin and expense guidance: the overall gross margin for the fourth quarter fell from 50.1% in the previous quarter to 47.9% (financial report interface calculation), and the company expects the holiday season gross margin to further decline to 45% to 46% (report summary). Meanwhile, operating expenses for the holiday season are expected to reach $20.4 billion to $20.8 billion, a year-on-year increase of 11% to 13%, mainly driven by increased AI-related R&D investments (report summary).

This means that while Apple's revenue growth remains strong, profit margins are being squeezed by costs. The revenue guidance growth rate for the holiday season is 7% to 10%, while operating expenses are expected to grow by 11% to 13%. If revenue growth cannot accelerate again, expenses and storage costs may continue to compress profit margins. Apple does not need to invest massive capital like cloud computing giants to build data centers; AI investments will still be reflected in its profit and loss statement through R&D expenses, storage chip costs, and changes in product structure.

The next focus for Apple, besides iPhone sales, is whether gross margins can stabilize, whether storage costs will continue to rise, and whether AI investments can bring sufficient product and service revenue. For investors, exceeding revenue expectations is just the first hurdle; whether profit margins can be maintained ultimately determines the quality of this growth.

Palantir faces a different kind of pressure: costs have not suddenly worsened, but the pressure comes from the market having already priced in very high growth expectations.

The company's third-quarter revenue was $2.313 billion, a year-on-year increase of approximately 96% (financial report interface revenue calculation and year-on-year), with U.S. commercial revenue of $984 million, a year-on-year increase of 148%, and adjusted earnings per share of $0.44, exceeding the market expectation of $0.41. The company also raised its full-year revenue guidance to $8.530 billion to $8.534 billion (report summary). Looking solely at the financial report, these numbers are sufficient to indicate that the business is still in a high-growth phase.

However, Palantir's stock price briefly rose after hours before turning down, with a daily drop of 3.13% (market interface and after-hours market interface). The pricing of high-valuation growth stocks does not only depend on how fast the growth is but also on whether the growth continues to exceed the thresholds already set by the market. When investors have already paid a high valuation for rapid growth over the next few years, meeting or slightly exceeding expectations for a single quarter often only confirms previous optimistic expectations rather than indicating new upside potential.

What Palantir needs to prove next is whether the rapid growth of its U.S. commercial business can be sustained and whether its international commercial business can keep pace. The growth in expenses due to hiring, product development, and market expansion also needs to be monitored (report summary). For such high-valuation companies, investors need to assess growth rates, profit margins, and valuations together; year-on-year revenue growth is just one aspect.

The commonality between Apple and Palantir is that the financial reports themselves did not show significant shortcomings, but the market has already digested a considerable amount of good news in advance. The companies must provide new evidence of growth to drive their stock prices higher.

4. AMD Takes the Baton: The Focus Shifts from Chip Demand to Delivery Curve

After the market closes on November 3, AMD will announce its third-quarter financial report. The market expects revenue of approximately $13 billion to $13.1 billion, a year-on-year increase of about 41.5%, with earnings per share of approximately $1.95, a year-on-year increase of about 62.5% (report summary). In the current market environment, simply exceeding these numbers may not be enough; investors truly want to confirm the shipping rhythm of the MI450 chip and Helios cabinets, as well as the company's outlook for its data center business in 2027.

Estimates from Susquehanna analysts provide a reference path worth tracking: MI450 and Helios began production and shipping in September, with larger-scale ramp-up expected in the fourth quarter of 2026 and the first half of 2027. OpenAI and Meta are expected to initiate their first gigawatt-level deployments in the second half of 2026, with Anthropic expected to follow in the first half of 2027. The analyst expects AMD's data center GPU revenue in 2027 to reach approximately $41 billion, with total data center revenue around $74 billion, exceeding Wall Street's expectation of about $71 billion (report summary).

However, this is still an analyst forecast and not actual order revenue. The growth in GPU shipments does not necessarily lead to a simultaneous improvement in profit margins; product ramp-up, system delivery, customer deployment, and supply chain costs may all affect final profitability. Analysts also indicate that gross margins in the GPU business may come under pressure during the rapid expansion period (as reported).

AMD's stock fell 7.52% on the previous trading day, as the computing sector experienced consecutive adjustments (market interface). If the financial report can confirm the shipment pace of MI450 and Helios and provide a sufficiently confident outlook for the data center in 2027, the market may reassess AMD's growth potential as the second source of AI computing power. Conversely, if the shipment timeline is delayed or the gross margin guidance is below expectations, the market may continue to lower its valuation of future revenue and profits.

For AMD, the most important observation tonight will be the verifiable delivery progress, customer deployment, and profit margin trajectory; management's statements regarding the AI market space are secondary information.

5. What to Watch Next in the U.S. Stock Market: Shifting from Chasing AI Concepts to Verifying Orders and Cash Flow

This round of market activity does not mean the end of the AI infrastructure investment cycle; rather, it changes the market's requirements for different segments, leading to differentiation. Companies with strong demand that require significant capital investment and those that can already convert orders into revenue and free cash flow may receive different valuation treatments.

In the direction of AI infrastructure, in addition to GPUs and chips, power, cooling, and data center supporting equipment are also worth continuous tracking. The transaction between Marvell and Lumentum indicates that optical interconnection remains an important industry segment, but no optical communication company is worth chasing high prices for this reason. Investors need to distinguish between real orders, capacity locks, and long-term procurement commitments, observing whether orders can be converted into revenue and whether capacity expansion will bring new capital expenditure and profit margin pressures.

Attention can be paid to power and data center infrastructure suppliers like Vertiv and Eaton. Vertiv's latest quarterly sales increased by 61% year-on-year (financial report interface calculates approximately 61.2% year-on-year), organic orders grew by 100%, and adjusted free cash flow reached $652 million. The company also raised its full-year performance guidance (orders and cash flow as reported). Eaton's second-quarter sales increased by 21% year-on-year (financial report interface calculates approximately 21.4% year-on-year), with rolling orders in its electrical Americas business growing by 41% and backlogged orders in its electrical business increasing by 43% (as reported). These indicators are more valuable than merely AI concepts, as they show that the demand for data center construction is being converted into equipment orders and corporate revenue.

However, order growth and stock price potential are two different matters. Next, we need to look at the speed of order conversion, the delivery cycle of backlogged orders, gross margins, and whether valuations have already reflected future growth. The stock price reaction after the financial report may have already factored in order growth.

For Apple, the focus should be on gross margins, storage costs, and service business growth. For Palantir, we need to see if U.S. commercial revenue can maintain high growth rates and whether international business shows improvement. Both companies have already proven business growth, and the market's expectations for them have been upgraded to continuously create new expectations.

For AMD, the most worth tracking are the mass production, shipment, and customer deployment progress of MI450 and Helios, as well as whether data center revenue growth can be converted into stable gross margins and cash flow. For Marvell and Lumentum, the industry demand and merger risks should be viewed separately: demand for optical interconnection can continue to grow, but the completion time of transactions, stock exchange prices, regulatory approvals, and synergy realization are independent variables.

If you wish to reduce exposure to a single financial report or merger event, broad-based indices can serve as a foundational position, while cash or short-term government bond assets can provide space for volatility during event weeks. When selecting stocks, rather than chasing the next hot AI narrative, it is better to prioritize companies with visible orders, stable profit margins, and free cash flow that can keep up.

The true watershed of this AI market lies in how much investors are willing to pay for long-term growth. When merger premiums can shrink within days, and comprehensive earnings reports that exceed expectations can also lead to stock price declines, the market is reminding investors: growth is still important, but the cost of growth, realization time, and cash returns are becoming more important pricing variables.

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