AI Spending Fears Trigger Historic Semiconductor Selloff as Tech Stocks Tumble

Wall Street's AI Trade Faces a Major Reality Check

U.S. technology stocks suffered a broad selloff on Thursday, November 5, 2026, as concerns about artificial intelligence spending, semiconductor demand, and a potential slowdown in data-center development intensified following the midterm elections.

The iShares Semiconductor ETF (SOXX) plunged approximately 9%, while the Nasdaq Composite dropped more than 4% and entered correction territory. Nvidia (NVDA), Advanced Micro Devices (AMD), and Micron Technology (MU) were among the hardest-hit semiconductor stocks, reflecting a sharp reversal in investor sentiment toward the AI trade. The selling extended well beyond chipmakers to software companies, data-center infrastructure providers, and the broader market. According to The Wall Street Journal, the rout erased approximately $2.5 trillion in market value and marked one of the most significant technology selloffs since the tariff-related turmoil of April 2025.

Key Points

• Semiconductor stocks suffered a historic selloff: SOXX plunged approximately 9% on Thursday and has fallen 37% from its June peak, dragging major technology indexes lower.
• AI infrastructure spending faces new uncertainty: Midterm election results, potential data-center restrictions, and disappointing corporate earnings raised concerns about the pace of AI investment.
• Valuations have fallen despite strong earnings expectations: Semiconductor valuations have declined sharply, even as analysts continue projecting substantial earnings growth for 2027.

Why Are Semiconductor and AI Stocks Falling So Sharply?

The selloff reflects several pressures converging at once rather than a single disappointing earnings report. The first is the political outlook for AI infrastructure. After Tuesday's midterm elections, Democrats gained control of Congress, while several newly elected state officials raised concerns about the environmental and utility demands of large data centers. Investors are questioning whether these developments could delay construction projects and slow spending on AI processors, memory chips, and supporting infrastructure.

Jefferies analysts responded by lowering their forecast for new data-center capacity in 2030 by approximately 8%, and UBS separately warned that a substantial portion of capacity scheduled for 2028 could face delays or other challenges. The concerns have affected companies throughout the AI supply chain. Nvidia declined approximately 9%, while AMD dropped more than 15%. Broadcom (AVGO), a supplier of custom AI chips, also came under pressure as investors reassessed the outlook for hyperscaler spending. The weakness extended to companies supporting data-center operations: Vertiv Holdings (VRT), which provides cooling and power infrastructure, fell approximately 15%, while Bloom Energy (BE) declined around 18%. The breadth of the selloff illustrates how closely connected semiconductor companies, infrastructure suppliers, and AI spending expectations have become.

Weak Earnings and Memory Market Concerns Add Pressure

Politics was only part of the story. Recent corporate earnings have also raised questions about semiconductor demand outside artificial intelligence, particularly in personal computers and smartphones. Intel (INTC) reported weakness in its PC business and issued disappointing fourth-quarter guidance, and its shares have fallen sharply since the announcement, even though its data-center and AI segment reported strong revenue growth. Qualcomm (QCOM) declined approximately 11% after reporting better-than-expected results but warning about weaker margins in its chip-design business. Arm Holdings (ARM) fell around 12%, as softer royalty revenue and pressure from higher memory-chip prices overshadowed otherwise solid quarterly results.

Micron Faces Both Market Share and AI Spending Concerns

Micron Technology was among the hardest-hit semiconductor companies, falling approximately 15% during Thursday's session. According to Counterpoint Research, Micron's share of the dynamic random-access memory (DRAM) market declined to 21% in the third quarter, compared with 26% a year earlier. DRAM provides the working memory that computers and AI processors use to manage active data and applications.

However, the market-share decline occurred during a period of exceptionally strong industry revenue growth. Counterpoint reported that global DRAM revenue increased 369% year over year, largely driven by higher selling prices rather than substantial increases in shipment volumes. That distinction matters because Micron's declining market share does not necessarily indicate weakening overall demand for memory chips. Nevertheless, investors remain concerned about the sustainability of hyperscaler spending, potential oversupply, and the financial commitments required to expand AI infrastructure.

Semiconductor Valuations Reset as Investors Reassess AI Growth

The magnitude of the selloff has substantially changed semiconductor valuations. SOXX has declined approximately 28% since the beginning of October and 37% from its June closing high. At its peak, the fund traded near 33 times projected earnings over the following 12 months; that multiple has fallen to approximately 16, its lowest level since 2023. Despite the drop in share prices, analysts surveyed by FactSet still expect earnings for the semiconductor ETF to increase approximately 51% in 2027, a notable divergence between stock market performance and earnings expectations.

Are AI Infrastructure Concerns Already Reflected in Stock Prices?

Analysts remain divided over how much additional risk the sector faces. UBS strategists noted that valuations had already fallen substantially before the elections and that investors had reduced their semiconductor exposure. Other market observers argue that restrictions on data-center development could produce delays rather than permanently eliminate demand. JoAnne Feeney of Advisors Capital suggested that states may continue welcoming data-center investments when developers address environmental concerns and contribute to their own power requirements. However, uncertainty remains surrounding the financing and spending commitments supporting the broader AI industry.

What It Means for Investors

Thursday's selloff highlights a shift in how Wall Street evaluates the artificial intelligence industry. Earlier in 2026, strong expectations for AI infrastructure spending helped support elevated semiconductor valuations. Recent earnings disappointments, political developments, and concerns about corporate financing have introduced greater scrutiny, and the debate is no longer focused exclusively on how quickly AI infrastructure can expand. Investors are also examining the financial sustainability, regulatory environment, and timing of that expansion.

The correction has also exposed differences between individual semiconductor markets. Companies serving personal computers and smartphones face demand challenges distinct from those supplying AI processors, advanced memory, and data-center equipment. For investors, the central question is whether the recent decline reflects a temporary reassessment of growth expectations or a more sustained slowdown in AI infrastructure investment. Future hyperscaler spending plans, data-center approvals, corporate earnings, and semiconductor demand will provide additional evidence.

Conclusion

The November 5 selloff marked a significant reversal for semiconductor and AI-related stocks, as political uncertainty over data-center development, weaker earnings outlooks, and concerns about the sustainability of AI spending pressured companies across the technology supply chain. Although valuations have declined considerably, industry earnings forecasts continue to point toward growth. The contrast between those expectations and current market sentiment underscores the uncertainty surrounding the next phase of AI investment.

FAQs

Why did semiconductor stocks crash on November 5, 2026?

Semiconductor stocks fell sharply because of concerns about potential restrictions on AI data-center development following the midterm elections, disappointing corporate earnings, and uncertainty surrounding future AI infrastructure spending.

How much has the semiconductor sector declined?

The iShares Semiconductor ETF fell approximately 9% on November 5 and has declined around 37% from its June 2026 closing high.

Why did Nvidia and AMD stocks fall?

Nvidia and AMD declined as investors reassessed the outlook for AI infrastructure investment, including potential delays in data-center construction and concerns about the sustainability of hyperscaler spending.

Why is Micron Technology stock under pressure?

Micron shares declined amid concerns about slower AI infrastructure spending, potential memory-chip oversupply, and a reduction in its share of the global DRAM market, despite strong overall industry revenue growth.

Are semiconductor earnings still expected to grow in 2027?

Yes. Analysts surveyed by FactSet project approximately 51% earnings growth for the iShares Semiconductor ETF in 2027, despite the sector's substantial stock price declines.

This article was created with AI assistance and reviewed by an editor. For details, please refer to our Terms of Use.

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