AI and Chip Stocks Plunge After US Midterms: What Happened and Why

November 6, 2026 · Cortex Solutions

On Nov 5, 2026 the Nasdaq fell 5.52% and chip stocks plunged as investors priced in tighter AI and data center rules after the US midterms. What it means for Saudi firms.

On Thursday, November 5, 2026, US stock markets saw one of the sharpest sell-offs in artificial intelligence and chip stocks in years, as investors reassessed their positions in light of the US midterm election results and what they could mean for tighter oversight of AI and data centers. In this article we set out exactly what the sources reported, then look at what it means for businesses in Saudi Arabia.

What happened in the session?

According to a Fox Business report published on November 5, 2026, the Dow Jones closed down 1,833 points, or 3.44%, the S&P 500 fell 4.36%, and the Nasdaq Composite dropped 5.52% in its worst day since April 2025, entering correction territory at least 10% below its October 6 record closing high.

The same report said the Philadelphia Semiconductor Index plunged more than 12% and Nvidia fell 9.26%, while data-center-linked stocks such as IREN, Applied Digital and Nebius each lost more than 14%. Meta fell about 3.96%, and Amazon and Alphabet about 2.2%.

Yahoo Finance's live coverage the same day reported that the Nasdaq-100 fell 6.3%, erasing about $2.3 trillion in market value, and that large-cap tech had its worst day since the COVID-19 pandemic sell-off. The coverage noted that AMD stock fell 15% during the session and that Palantir shed about $40 billion in market value.

Why the sell-off now?

The sources agree that the trigger was political and regulatory more than technical:

• The midterms: Fox Business tied the decline to the Democrats' sweeping midterm wins and what they could mean for AI regulation and data center development.
• Power bills: the report explained that rising electricity prices have turned data center buildouts into a political issue, with some Democrats calling for restrictions or pauses.
• Spending and debt: in a second Fox Business report the same day, economist Paul Mueller pointed to the amount of debt tech companies are issuing to build data centers, while Adam Patti, CEO of VistaShares, cited fears of more regulation, slower permitting and pushback over power bills, as well as questions about how long hyperscalers can keep spending at this pace.
• Crowded trades: Patti said semiconductors were "the most crowded trade in the market", and that crowded trades unwind violently. Yahoo Finance quoted Nomura's Charlie McElligott as saying the primary catalyst is not a sudden deterioration in fundamentals, and Vanda Research as reporting heavy selling by retail investors.

Has anything changed in AI itself?

This is the key point: most of those quoted see a repricing, not a collapse in demand. Patti called it "a valuation and sentiment reset, not a change in fundamentals", said that "power is the real bottleneck in AI today, more than chips", and added that "capacity relocates. It does not disappear." Yahoo Finance quoted AMD CEO Lisa Su as saying: "I believe in this demand."

In other words, the market is reconsidering the speed, cost and location of the infrastructure buildout, not the value of AI itself.

What does it mean for Saudi businesses?

• Don't tie your decisions to market swings: a fall in chip stocks changes nothing about the value of automating customer service or document processing in your company. The right yardstick is the actual return to your business, not Nvidia's share price.
• Power and location are now part of the equation: if power constraints and permitting slow data center construction in the United States, countries with energy and land, including Saudi Arabia, become more prominent on the compute map. Microsoft announced on August 31, 2026 that its "Saudi Arabia East" datacenter region would be available to customers in November 2026, allowing eligible workloads to be hosted inside the Kingdom.
• Start with small, measurable projects: in volatile times, favour use cases with a clear return, such as answering common questions or sorting invoices, over large projects tied to a single vendor.
• Don't lock yourself into one provider: design your solutions so the AI model or cloud provider can be swapped if prices or regulations change.

At Cortex Solutions we build AI agents and automation connected to the tools you already use, with clear reports on what they accomplish. Service details: https://cortex.sa/services/ai-automation

Sources: Fox Business (November 5, 2026, two reports), Yahoo Finance live coverage (November 5, 2026), and Microsoft's announcement (August 31, 2026).