Global markets stumbled on Wednesday as investors digested a decisive Democratic sweep in the US midterm elections, with American stock futures falling, the dollar softening and money moving into the safety of government bonds. The sharpest selling hit technology and artificial intelligence-linked shares, as traders weighed what divided government could mean for the data-centre building boom that has powered markets for years.
Futures for the S&P 500 slid 0.6 percent in early trading, while Nasdaq futures fell more than 2 percent before cutting their losses to trade down 0.8 percent, according to Reuters. European futures were down 1.4 percent. The moves came ahead of the regular Wall Street session, and they followed a night in which Democrats captured majorities in both the Senate and the House, winning Senate races in Republican strongholds including South Carolina, Texas and Ohio.
The results, still projections rather than final certified counts, caught many investors off guard, Reuters reported. The breadth of the Democratic success, including gains in districts long considered safely conservative, underscored a political shift that markets had not fully priced in. Prediction markets had signalled growing expectations of a Democratic sweep, with more than 1.48 billion dollars wagered on the midterm elections, according to Reuters.
The Overnight Sell-Off
In Asia, the bulk of the selling was concentrated in AI-linked stocks. Chipmakers Samsung, SK Hynix and TSMC slid sharply, Reuters reported. AI proxy SoftBank led Japan's benchmark Nikkei 3 percent lower to a more than five-month trough. South Korea's KOSPI fell 1.6 percent in early trading, and MSCI's broadest index of Asia-Pacific shares outside Japan slipped 0.5 percent.
The selling came even as strong earnings from chipmaker AMD appeared to ease some concerns about the durability of the AI trade, according to Reuters. That reassurance was not enough to offset the political shock. Cryptocurrencies also fell at the prospect of stronger regulation under a Democratic Congress, Reuters reported.
In the oil market, prices were choppy on Wednesday after sliding to a four-week low in the previous session, as investors weighed talks to end the wars in Ukraine and Iran against worries that recent attacks in both conflicts could further disrupt supplies, according to Reuters.
Why Tech and AI Took the Hardest Hit
The AI boom has helped propel global markets in recent years, driven by heavy spending from tech giants racing to build data centres and expand computing capacity. That has left investors acutely sensitive to anything that could derail the technology's rapid expansion, Reuters noted.
"Tighter regulatory scrutiny of technology and AI companies along with the higher likelihood of political gridlock beckon with a Democrat sweep," Prashant Newnaha, a senior rates strategist at TD Securities in Singapore, told Reuters.
Charu Chanana, chief investment strategist at Saxo, said the sharper decline in Nasdaq futures reflects concerns that a shift in political control could bring greater regulatory scrutiny of AI and Big Tech, at a time when investors are already questioning elevated valuations and rising AI spending.
The data-centre issue also has a local dimension. Opposition to data-centre construction emerged as a campaign issue during the election, with voters raising concerns about electricity costs and infrastructure demands, according to reports. Kim Seok-hwan, an analyst at Mirae Asset Securities, told Reuters that the Democrats' victory in Texas is likely to weigh on chip stocks, raising fears of tighter curbs on AI data-centre development in one of the fastest-growing markets for computing infrastructure in the United States.
"If Texas declares a moratorium on data centres, as New York did, projects could face further delays," Kim said. "Today's market reaction is clearly reflecting concerns and uncertainty over these issues."
Tuesday's outcome could hold broad implications for market-sensitive areas including the AI data-centre buildout, the US fiscal outlook, defence spending and regulation in areas such as healthcare, banking and cryptocurrencies, Reuters reported.
Bonds, the Dollar and Safe Havens
While stocks fell, bonds rallied. The yield on the benchmark US 10-year Treasury note fell 6 basis points to 4.906 percent as investors sought safety, Reuters reported. Treasuries rallied as investors expect gridlock in Washington to cut government spending, while AI regulation could slow growth and reduce the need for interest rate hikes.
"Bonds are coming out as the clear winner as markets put the AI trade on the chopping block and embrace the higher possibility that further tax cuts are put on ice and government spending slows," Newnaha told Reuters.
The dollar slid broadly against major peers. The euro rose 0.5 percent to 1.1249 dollars, while sterling firmed 0.37 percent to 1.3464 dollars, leaving the dollar index 0.37 percent lower at 101.34, according to Reuters. The safe-haven Japanese yen and Swiss franc notched the biggest gains in a volatile session, with the yen 0.7 percent stronger at 157.55 per US dollar and the franc almost 0.8 percent firmer at 0.8144 per dollar. Gold also gained, rising 0.5 percent to 3,947.49 dollars an ounce in an early morning reading reported by Reuters.
The Federal Reserve held its benchmark rate at 3.75 to 4.00 percent at its October 28 meeting, and traders will now watch whether slower government spending and tighter AI regulation change the outlook for growth and inflation in the months ahead.
What This Means
For ordinary Americans, the market reaction is an early signal rather than a verdict. Futures trading points to how the regular session may open, but it does not determine where stocks will close, and early sell-offs have often faded by the end of the day. What matters more is what divided government actually does: whether Democrats use their new majorities to investigate the Trump administration, block nominees, demand concessions on major legislation, or push new rules for technology companies.
President Donald Trump has said he would accept the election results and work with Democrats, while also telling Fox News he would veto Democratic bills he considered unacceptable, according to reports. That combination, cooperation on some issues and confrontation on others, is exactly what markets are trying to price in.
The deeper story is about the AI trade itself. For two years, the market's rise has rested heavily on the belief that data-centre spending would keep growing almost without limit. The midterm reaction suggests investors are now asking harder questions about valuations, electricity costs, local opposition to new centres, and the regulatory environment. None of those questions has an answer yet, which is why the selling was sharpest in the very shares that had risen furthest.
What Happens Next
The first test comes when the regular Wall Street session opens later on Wednesday, when traders will see whether the overnight futures losses hold or fade. Investors will also watch the September US trade balance, scheduled for release at 8:30 a.m. Eastern time on Wednesday, and the October jobs report due on Friday, November 6, for fresh evidence on the economy's direction.
Beyond this week, attention turns to how the new Congress takes shape. Democrats are expected to hold internal leadership elections in the week of November 16, with House Minority Leader Hakeem Jeffries positioned to become the party's nominee for speaker. The new Congress will be seated in January, and its first moves on spending, technology regulation and investigations will set the tone for markets into 2027.
For now, the message from Wednesday's trading is clear: the election changed the political map, and markets are repricing what that means for the companies that have driven the rally. Whether the sell-off proves to be a brief adjustment or the start of a deeper reassessment of the AI boom will depend on what Washington does next, and on whether the earnings and economic data in the coming days support the case for continued growth.
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