The Nasdaq plunge November 2026 delivered Wall Street its worst day in more than a year on Thursday, erasing roughly $3 trillion in value from American stocks just one day after the post-midterm rally. The tech-heavy index fell 5.52 percent to 24,315, its biggest one-day drop since April 2025, and closed in correction territory, more than 10 percent below the record high it set on October 6.
The sell-off was broad and brutal. The S&P 500 lost 4.36 percent to 7,353.73, and the Dow Jones Industrial Average fell 1,833 points, or 3.44 percent, to 51,523.06, wiping out Wednesday’s gain of about 1,569 points and then some. All 11 sectors of the S&P 500 ended the day lower, with technology shares falling 7.3 percent, according to market reports.
Why the Nasdaq plunge in November 2026 hit chip stocks hardest
The damage was concentrated exactly where the artificial intelligence boom lives: semiconductors, memory, and the companies building data centers. The Philadelphia Semiconductor Index plunged about 12 percent, its second-biggest fall on record and its worst session since March 2020.
Nvidia, the company most associated with the AI boom, fell about 9 percent. Advanced Micro Devices and Micron each fell about 17 percent, SanDisk dropped 22 percent, and Broadcom lost more than 10 percent. Tesla fell about 10 percent, while CoreWeave, which rents access to AI chips through the cloud, lost 9.8 percent.
Reuters estimated that about $2 trillion was wiped off the Nasdaq’s market value in a single day. Other estimates put the total loss across American stocks closer to $3 trillion.
Midterm results changed the politics of the AI boom
The trigger was politics. Tuesday’s midterm elections gave Democrats control of both chambers of Congress, and investors spent Thursday repricing what that could mean for the artificial intelligence buildout: the massive data centers that need power, water, permits, and local approval.
Investors fear the new Democratic Congress will tighten rules on artificial intelligence and slow data center construction. Texas Governor-elect Gina Hinojosa has pledged to regulate data centers more tightly, and voters in several states rejected local data center measures on Tuesday.
Company-specific news added to the pressure. Qualcomm fell after reporting fiscal fourth-quarter handset chip revenue of $5.14 billion, down 26 percent from a year earlier, and issuing weak guidance. Arm Holdings also slid after its latest results.
What the correction means for investors
The Nasdaq is now in correction territory, defined as a fall of 10 percent or more from a recent high. The index sits roughly 14 percent below its all-time high from only a month ago, according to market coverage.
Analysts quoted in market reports were split on what comes next. Some argued the sell-off was an overreaction, pointing out that no major AI company announced a cancelled product, a lost customer, or a broken business on Thursday. Nvidia now trades at a forward price-to-earnings ratio of less than 20, and Micron at less than 4, according to the Motley Fool.
Others cautioned that the political risk is real and lasting. Data center projects face years of permitting battles, and a Congress skeptical of the AI buildout could slow the spending that has powered the market’s rise.
- Nasdaq: down 5.52 percent to 24,315, biggest one-day drop in 19 months
- S&P 500: down 4.36 percent to 7,353.73
- Dow: down 1,833 points, or 3.44 percent, to 51,523.06
- Semiconductor index: down about 12 percent, second-biggest fall on record
- Biggest losers: SanDisk down 22 percent; AMD and Micron down about 17 percent; Nvidia down about 9 percent
What to watch next
Investors will watch whether Friday brings a bounce or a second day of selling, and whether Democratic leaders signal how aggressively they plan to regulate data centers and AI. Earnings from major technology companies in the coming weeks will also test whether the AI spending boom is slowing or simply being repriced.
How Thursday compares with past sell-offs
Thursday’s drop ranks among the sharpest single-day falls of the past two decades, though it remains well short of the worst days of the 2008 financial crisis or the pandemic crash of March 2020, when the Nasdaq fell more than 12 percent in a single session. What made Thursday unusual was the speed of the reversal: Wednesday had been one of the strongest sessions since April 2025, with the Dow gaining about 1,500 points. The two-day swing, from euphoria to fear, shows how much of the market’s recent strength rested on a single bet, that the AI data center buildout would continue without political interruption. With that assumption now in doubt, investors are repricing everything connected to it, from chipmakers and cloud providers to the utilities and construction firms that supply the data center boom.
For now, the message from Thursday is clear: the market’s faith in the AI trade, which carried stocks to record highs through October, has been shaken. Whether the Nasdaq plunge in November 2026 becomes a buying opportunity or the start of something deeper depends on politics as much as profits.
Sources: Reuters, Associated Press, Motley Fool market coverage of the November 5, 2026 trading session.