NASDAQ’s 5.5% Plunge Puts AI boom’s Political Risks In Focus

Investors sold technology and AI-related shares across Wall Street last week. The Nasdaq Composite, an index of many technology companies, fell 5.52% to 24,315.00. It was now more than 10% below its record high from 6 October, which put it into what is called a “correction”.

The sell-off wiped out about $2.5 trillion from the value of US companies. Market investors' new concern highlighted that the Democrats’ gains in the midterm elections, especially in Texas, could make it harder to approve, finance and build the huge data centres needed for artificial intelligence.

The selling on November 5 was reportedly Nasdaq’s worst one-day fall in 19 months, and its sharpest since April 2025, when the U.S. President Donald Trump announced wide-ranging global tariffs. The Dow Jones Industrial Average fell 3.44% to 51,523.06. The S&P 500 also had its worst day since April 2025.

Politics Hits the AI Supply Chain

The main trigger was not a company reporting poor results or a failure in AI technology. Instead, investors suddenly saw more political risk around the building of AI infrastructure.

Two days after Democrats made gains in the midterm elections, investors began to worry that newly elected officials could slow down data-centre projects. They feared this could mean fewer approvals, fewer tax breaks and slower connections to the electricity grid in Texas—one of the most important places in the US for AI infrastructure.

Texas Governor-elect Gina Hinojosa had campaigned on stopping new data-centre approvals until the state legislature passes laws protecting water supplies, electricity, workers and local communities.

“When I am governor, I will issue a moratorium, a ban, on all data center approvals until laws can be passed by the Legislature to protect Texans,” she said on X.

Greg Abbott is still approving data centers in Texas despite his election year “pause.”  That’s Abbott’s playbook: he sells us out and then lies about it. https://t.co/ozFasjNs3W

— Gina Hinojosa (@GinaHinojosaTX)

October 22, 2026

That pledge seemingly mattered to markets because Texas has become central to the industry’s expansion. Companies including Google, Meta, Oracle and OpenAI have committed major investments to data centres in the state, while developers rely on its land, energy capacity and relatively business-friendly regulatory environment.

Hinojosa later sought to narrow that, “It is not that I hate data centers,” according to reports by CNN. “I hate the way they are taking advantage of Texas, and that stops when I’m governor.”

Her position creates a more precise market risk than a blanket ban: a pause on new approvals, pending state legislation, rather than an immediate halt to projects already operating or under construction. Political scientist Nancy Sims said that a governor could impose a moratorium on future projects but could not readily reverse permits or tax abatements already granted, as reported by ABC13. 

Chips, Clouds and Power Bear the Brunt

The biggest falls were in companies most closely linked to spending on AI: computer-chip makers, cloud-computing companies, data-centre developers and electricity suppliers.

Nvidia, one of the most important companies in AI chips, reportedly fell 9.3%. The Philadelphia Semiconductor Index, which tracks major chip companies, dropped 12.3%. That was its worst day in about six and a half years.

The selling was not limited to a few chip companies. Every one of the 11 sectors in the S&P 500 ended the day lower. The Cboe Volatility Index, or VIX, a measure of how much investors expect markets to move, rose by about 70%. CNN reported that this was its biggest one-day rise in nearly two years and its highest level in seven months. 

Investors’ Concern

The market’s concern was not simply that data centres may face new rules. It was that a slowdown is much likely to expose how dependent the AI trade has become on an unusually rapid, capital-intensive expansion of chips, electricity, land, cloud capacity and debt financing.

Investors had already been debating whether companies were building more computing capacity than eventual demand would justify. CNN reported that the fast pace of construction had raised questions about potential overbuilding, while Wall Street was also weighing whether restrictions could ultimately improve profitability for hyperscalers by reducing capital expenditure.

That tension explains the sudden change. On November 4, shares of Amazon, Meta and Google rose as investors briefly saw restrictions as a way to curb spending and free up cash. By November 5, the interpretation reversed, with investors treating policy risk as a broader threat to AI demand and deployment.

Ed Yardeni, President of Yardeni Research, framed the pullback as a necessary cooling of speculative enthusiasm. “We want a slowdown in the AI buildout. It was too frenzied and speculative,” he told CNN. “Now we are letting air come out of the AI bubble. It’s better to let air come out of the AI bubble than let it burst.”

The stocks building AI infrastructure just crashed, but analysts keep raising their earnings estimates to record highs. 🔒 Members-Only https://t.co/PqU3SrSkl5

— Yardeni Research (@yardeni) November 8, 2026

Keith Lerner, chief investment officer at Truist Advisory Services, took a more measured view, describing the move as a knee-jerk reaction rather than a definitive verdict on technology stocks under Democratic control. “In our view, the risk-reward is improving for longer-term investors,” he said

What it Means beyond The Wall Street

The fall matters to more than just technology investors. The AI building boom affects borrowing, electricity use, construction and local economies.

If Texas slows approvals for new data centres, it would not immediately stop projects already under way. But it could delay future capacity, make borrowing more expensive and force companies to explain more clearly how their projects will affect water supplies, electricity use and nearby communities.

The episode also shows how quickly financial markets can react to an election result. The Nasdaq had reached record highs in September and October before falling back into a correction. After the 5 November sell-off, it was about 12% below its 6 October peak. The S&P 500 was about 6% below its own peak.