US stocks soared this Wednesday, the 4th, after Democrats scored big wins in key races across the country, according to NBC News. Early projections made it clear that the party is set to take control of the US Senate and the House as well. Wall Street was happy to turn the page on political uncertainty without waiting days for a final call, something that did not happen in past elections.
The celebration came with a catch, though. Analysts quoted in the report see a risk to the pace of artificial intelligence investments, since Democratic wins in major states could slow the construction of data centers. Anyone following tech investments in Brazil has good reason to pay attention. Much of the AI used there runs on the infrastructure of these American companies.
The turnaround was fast. On Tuesday night, as the first results came in, Nasdaq 100 futures fell as much as 2.5%. By the next morning, the picture had flipped. According to NBC News, the Nasdaq Composite rose 2.2%, the S&P 500 gained more than 1.9%, the Russell 2000, an index of small and mid-sized companies, climbed 1.5%, and the Dow Jones jumped 1,500 points.
What investors liked most was the clarity. According to the report, George Saravelos of Deutsche Bank believes a broad Democratic majority in Congress, combined with the stated willingness of Donald Trump to work with the opposition, should act as a brake on more extreme decisions. In his view, the market now sees sudden shifts from the White House as something with an expiration date.
Goldman Sachs economists went further. They expect Democrats to use budget deadlines to try to limit the war with Iran, roll back some tariffs and reverse spending cuts passed last year. Oil, which climbed sharply this year because of the conflict, dropped more than 9%.
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The downside: data centers and tech stocks
This is where the main counterpoint lies. Morgan Stanley strategists, cited by NBC News, point to a slightly more negative mood around AI, as expectations grow for restrictions on data centers.
Goldman Sachs draws a useful distinction. At the federal level, little should change in the short term, because any rule on AI and data centers would still need support from both parties. In the states, it is a different story. Democratic wins there could lead to temporary pauses on construction, potentially affecting about 45% of the planned capacity expansion in the US, according to the bank.
The names help explain why. In Georgia and Ohio, the Democrats elected governor, Keisha Lance Bottoms and Amy Acton, have already backed pausing data center construction in their states. In Texas, Gina Hinojosa defeated Republican governor Greg Abbott. For Sarah Bianchi of Evercore, Democratic wins in these three states, which hold a significant share of the projects in the country, mean new pauses and restrictions for the sector. She was the one who described the result as a blue tsunami.
Texas carries the most weight. Perhaps no other state has drawn as much attention from AI investors, and Tobin Marcus of Wolfe Research said in a recent note that it is the only one big enough for a slowdown to really make a difference. On top of that, projections point to Democratic Senate wins in swing states where data centers were a campaign issue, such as Georgia, North Carolina, Michigan, Ohio, Iowa and Kansas.
The reaction came the same day. SpaceX and Tesla, both run by Elon Musk and both active in AI and data centers, fell about 4%, according to the report. Musk, who spent hundreds of millions of dollars backing Republican candidates, joked on social media that putting data centers in space looks more and more appealing. He has already proposed sending AI servers into orbit, but most experts see major hurdles to the idea.
There is yet another source of tension. JPMorgan Chase analysts mentioned a possible investigation risk for executives close to Trump. Democratic leaders have already signaled interest in looking into projects tied to the president starting in January, when the new majority will have subpoena power in Congress.
The bigger picture shows how much is at stake. Since the 2024 election, the Nasdaq 100 has gained 40%, compared with about 30% for the S&P 500, according to NBC News. Much of that rise came from tech stocks and the hundreds of billions of dollars that Amazon, Nvidia, Microsoft and Alphabet have been pouring into models, data centers and equipment. We have been following this trend too, as we showed when covering how artificial intelligence and automation are driving investments.
And the market was already jittery. On Friday, according to the report, the S&P 500 and the Nasdaq had their worst day since mid-June, after Intel and Amazon, two key suppliers to AI companies, posted mixed results. The question of when these massive investments will pay off did not start now.
Even so, Bianchi urges calm. In her view, the real impact will depend on the details, such as transition rules for projects already underway and the chance that construction moves to other states. Still, she expects a bumpy 2027 for data center developers, with companies forced to adapt to a shifting regulatory landscape.
What this means for people working in tech in Brazil
For now, nothing changes day to day. But the topic deserves attention. Models, cloud services and AI APIs used in Brazil rely, to a large extent, on the infrastructure that big tech companies run in the US. If data center construction loses steam there, that is a signal worth watching closely.
Another point is investor mood. Swings in tech stocks can affect the appetite of those who fund innovation, and that could eventually spill over to startups and AI projects seeking tech investments in Brazil. It is a possibility, not a forecast.
For entrepreneurs and people working in marketing and product, the advice is simple. Keep an eye on pricing, usage limits and the availability of AI tools over the coming months. And avoid rash decisions based on the noise of a single trading day.
In the short term, the market got some political relief. In the medium term, questions remain about the infrastructure that powers AI. The next milestones are the arrival of the new majority in Congress in January and the first state decisions on data centers. To understand how Washington has been handling the issue, also read about how artificial intelligence is putting pressure on legislation in the US Congress.
