The most violent week in the trillion-dollar club's history took three days. On November 3, 2026, Americans voted in the midterm elections. On November 4, the market celebrated. On November 5, it changed its mind, violently. By the close of November 5, the S&P 500 had fallen 4.4%, the Nasdaq 5.5%, and the Magnificent Seven stocks had lost more than $1T combined. It was the worst day for US stocks since April 2025, and it redrew the top of our tracker in a single session.
Democrats swept both chambers of Congress in the November 3 midterms, and won governor races in Texas, Georgia, Ohio, Iowa, and Nevada, states that hold about 37% of planned US data-centre capacity. Voters also backed most local data-centre moratoria on the ballot. For the AI buildout, the message was plain: the era of unquestioned, fast-permitted data-centre construction might be ending.
The market's first reaction was euphoria. The Dow rose 3% on November 4, its best day since April 2025, and the S&P 500 added 1.58%, gaining more than $1T in market value in a day. Apple rose 5.31% and crossed $5T for the first time, retaking the top spot. Walmart crossed $1T. Gold rose 3.4% and reclaimed $4,000 an ounce. Sixteen companies were worth more than $1T. For one day, the AI trade looked unstoppable.
Then investors read the midterm results a second time. The Philadelphia Semiconductor Index fell about 11%, Nvidia fell 9.26% to $181.60, shedding approx. $440-450B of market value in a day, and AMD fell 17.3%. Tesla and SpaceX each fell more than 9%. The Dow dropped more than 1,800 points. Two risks were being repriced at once: that data-centre permits and regulation would slow the buildout, and that the enormous AI capital spending by the big technology companies might not earn its keep. Elon Musk lost approx. $79.4B in a single day, falling to approx. $789.5B. Larry Ellison fell out of Forbes' top ten as Oracle slid.
The sell-off did not end on November 5. Nvidia kept falling, to $178.67 by November 9, down about 26% from its October 6 record close. But November 5 was the day the narrative broke: the question stopped being how fast AI spending would grow, and became whether it would pay. That question is still open, and Nvidia's earnings on November 17, 2026 will be the next big test. We cover Nvidia's slide in full in our post on the $5 trillion club of one.
Three lessons are worth keeping. First, political risk is market risk: an election about data centres moved trillions of dollars in three days. Second, a rally and a sell-off can share a single cause, read two ways: the same midterm result that lifted Apple on November 4 crushed Nvidia on November 5. Third, the trillion-dollar club is not insulated from the market it sits atop. Its members lost more than $1T in a day, and two of them, Walmart and Micron, fell out of the club within a week. The numbers in this article are dated for a reason: in a week like this one, a figure from Monday is history by Friday.