Wall Street's post-election celebration lasted exactly one day. On Thursday, November 5, 2026, the Dow Jones Industrial Average plunged 1,833 points, the S&P 500 suffered its worst day since April 2025, and the Nasdaq Composite tumbled into correction territory as a brutal selloff in chip stocks erased Wednesday's entire midterm rally — and then some.
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| Traders on the floor of the New York Stock Exchange. The Dow fell 1,833 points on Thursday, November 5, 2026, erasing the previous day's rally. |
A Brutal Day on Wall Street
The scale of Thursday's losses was historic by any measure. The Dow Jones Industrial Average fell 1,833.06 points, or 3.44 percent, to close at 51,523.06, according to the Associated Press. The S&P 500 dropped 334.89 points, or 4.36 percent, to 7,353.73, its steepest one-day decline since President Donald Trump announced sweeping global tariffs in April 2025. The Nasdaq Composite sank 1,421.52 points, or 5.52 percent, to 24,315.00, its worst day since the same April selloff.
The damage was concentrated where the market's recent gains had been built. The Philadelphia Semiconductor Index collapsed 12.25 percent to 9,011.14, its worst day in roughly six and a half years. Nvidia, the chip giant at the center of the artificial intelligence boom, tumbled 9.3 percent, while Advanced Micro Devices plunged 17.3 percent, according to the Associated Press.
The Nasdaq's fall carried a symbolic weight beyond the single session. The tech-heavy index closed 11.9 percent below its record close of 27,599.89 set on October 6, putting it in what market watchers call correction territory — a decline of more than 10 percent from a recent peak. The Nasdaq-100, which holds the largest companies in the broader index, fell 6.4 percent, and Reuters reported that the slide wiped about 2.5 trillion dollars from the market value of the index's constituents.
Selling was not limited to technology. Nine of the eleven S&P 500 sectors had risen the day before; on Thursday, the rout spread across the market as investors rushed to reduce risk. Energy stocks were among the few exceptions, supported by rising oil prices after fresh tanker attacks renewed uncertainty about shipments through the Strait of Hormuz, Reuters reported.
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| A close-up of a computer processor chip. Chipmakers led Thursday's selloff as investors worried about the pace of AI data center construction. |
Why Chip Stocks Led the Rout
The trigger, according to Reuters and the Associated Press, was a second look at Tuesday's midterm election results. Democrats won control of both chambers of Congress, and investors spent Thursday reassessing what that sweep could mean for the artificial intelligence buildout — the single biggest driver of corporate spending and stock market gains over the past two years.
The fear centers on data centers. The massive facilities that power AI systems have become a political flashpoint in many states, where residents and local officials have raised concerns about electricity use, water consumption, and construction near communities. Democratic victories in several governorships and state legislatures raised the prospect of moratoriums or tougher rules that could slow data center construction — and with it, demand for the chips, power equipment, and services that feed the AI boom.
Analysts at UBS, cited by Reuters, estimated that roughly 30 percent of expected United States data center capacity additions in 2028 could be at risk from construction pauses. That single estimate helps explain why chipmakers bore the brunt of Thursday's selling: if fewer data centers get built, fewer AI chips get ordered.
Other pressures added to the slide. Reuters reported that Qualcomm's smartphone chip sales missed expectations, weighing further on the semiconductor sector. Strategists also pointed to worries about borrowing costs, with investors questioning whether the debt-fueled pace of AI infrastructure spending can continue. Mark Hackett, a strategist at Nationwide, told Reuters that aggressive institutional selling and deleveraging were major forces behind the rout.
Not everyone expects the buildout to stop. Melissa Brown, global head of investment decision research at SimCorp, told Reuters that newly elected officials seem unlikely to halt AI infrastructure development entirely. But that reassurance did little to calm a market that had priced in years of uninterrupted expansion.
The Rally That Lasted One Day
What made Thursday so striking was how completely it reversed the mood of just 24 hours earlier. On Wednesday, November 4, stocks had soared after the midterm results, with the Dow jumping 1,569.40 points in its biggest one-day gain since April 2025 and closing above 53,000 for the first time since September. Investors had cheered the prospect of divided government and gridlock in Washington, betting that a Democratic Congress would check the White House while leaving the economy alone.
By Thursday, that interpretation had flipped. Instead of gridlock, investors began to price in a Democratic Congress willing to regulate the AI industry, slow data center approvals, and challenge the administration's economic agenda. Across the two sessions, the Dow ended down 263.66 points — a round trip that left the market lower than where it started the week.
President Trump, who had celebrated Wednesday's rally on social media, blamed the Democrats for Thursday's losses. "The Stock Market suffered one of the Worst Days in History based on the results of the Election," he wrote on Truth Social, according to the New York Post. He vowed that the United States would come back stronger, telling supporters not to fear.
The selloff spread beyond American shores overnight. Japan's Nikkei index fell 5.7 percent and South Korea's Kospi dropped 7.4 percent on Friday, according to the Associated Press, as Asian chipmakers including Samsung and SK Hynix followed their American counterparts lower.
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| Rows of server racks inside a data center. Investors fear new limits on data center construction after the Democrats' midterm wins. |
What This Means
Thursday's plunge was more than a bad day for traders. It was the market's first serious test of a question that will define the next two years: how much of the AI boom depends on politics staying out of the way?
For much of 2025 and 2026, investors treated the AI infrastructure buildout as a force of nature — hundreds of billions of dollars flowing into data centers, chips, and power generation, largely immune to Washington's fights. The midterm results challenged that assumption. If new majorities in Congress and statehouses move to slow data center construction, the earnings growth that justified sky-high chip valuations could arrive later and smaller than expected.
At the same time, it is worth keeping Thursday in perspective. Despite the rout, the major indexes remained higher for the year, according to the Associated Press: the S&P 500 was up approximately 7.4 percent in 2026, the Dow had gained 7.2 percent, and the Nasdaq remained 4.6 percent higher. A correction in the Nasdaq is a warning, not a crash, and corrections have historically been a normal feature of bull markets.
The deeper signal may be about concentration. The market's gains have rested heavily on a small group of AI-linked companies, and Thursday showed how quickly that concentration can turn into vulnerability. When the story supporting those stocks wobbles — even on a political fear rather than a business fact — the selling can be swift and severe.
What Happens Next
Investors will get a quick read on the broader economy on Friday, November 6, when the Labor Department releases the October jobs report at 8:30 a.m. Eastern. Economists surveyed by Reuters expect nonfarm payrolls to have increased by about 65,000 last month, after a gain of just 29,000 in September, with the unemployment rate holding at 4.2 percent. A strong report could steady nerves; a weak one could deepen the selloff.
Beyond Friday, attention turns to the October consumer inflation report on Tuesday, November 10, and to the Federal Reserve's meeting on December 9, where policymakers will weigh whether to adjust interest rates. Both will shape the borrowing costs that matter so much to data center financing.
The political story is only beginning. The new Democratic majorities will not take their seats until January, and their first moves on technology, energy, and regulation will be watched closely. Any concrete proposal to pause or restrict data center construction — or any signal that such proposals are off the table — could move chip stocks sharply in either direction.
For now, the market has delivered its verdict on the election's first week: the rally is gone, the correction is here, and the AI trade that carried Wall Street to record highs is facing its toughest question yet.
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