Nicolai Haugsted
Wall Street celebrates the Democratic victory while semiconductor giants face a brutal sell-off.
Wall Street has spent much of the year navigating an increasingly unpredictable combination of geopolitical tensions, rising energy costs and enormous investments in artificial intelligence.
Investors have grown accustomed to sharp market movements whenever developments in Washington threaten to alter the economic outlook.
But the latest political shake-up has produced a particularly striking reaction. Following the Democrats’ sweeping victory in Tuesday’s US midterm elections, global financial markets are moving in dramatically different directions.
While many major stock indexes have climbed, oil prices have suffered a spectacular collapse, and some of the world’s biggest technology markets are facing heavy losses. According to Reuters, investors are increasingly betting that the election results could influence Donald Trump’s handling of the war against Iran, potentially easing pressure on global energy supplies.
At the same time, Democratic gains have raised concerns about tighter restrictions on the artificial intelligence industry.
The result is a financial market where traditional stocks are celebrating, oil traders are reassessing their expectations, and semiconductor companies are having a considerably less enjoyable week.
Oil prices suffer one of their biggest collapses in years
The most dramatic market reaction has come from the energy sector.
Brent crude oil futures plunged nearly 9 percent overnight, falling below $100 per barrel as investors reconsidered the outlook for the conflict between the United States and Iran.
By Thursday, Brent was trading around $94.21 per barrel.
The decline brought oil’s total losses for the week to approximately 20 percent.
Should those losses persist through Friday’s close, it would mark the largest weekly fall in oil prices since April 2020, when the coronavirus pandemic triggered an extraordinary collapse in energy demand and US crude futures briefly traded below zero.
The latest sell-off reflects growing expectations that Trump could face greater political pressure to reduce tensions with Iran.
Democrats have secured control of both chambers of Congress, giving them new opportunities to challenge the administration’s decisions and scrutinize its handling of the conflict.
The war has also become a major political liability for Republicans.
Trump acknowledged on Wednesday that the conflict contributed to his party’s election defeat.
Vice President JD Vance was considerably more direct in a post on X.
“The reason we lost is the war,” he wrote.
Investors appear to be interpreting those developments as a possible incentive for the administration to avoid further escalation.
However, expectations of a diplomatic breakthrough remain speculative, and the election results do not guarantee that the conflict will end.
Wall Street welcomes the prospect of political gridlock
While energy markets have been hit hard, investors in many other sectors have welcomed the election outcome.
The S&P 500 rose 1.6 percent on Wednesday, while European shares climbed to their highest level in two months.
The gains reflect expectations that Democratic control of Congress could make it more difficult for Trump to introduce major legislative changes.
For financial markets, political gridlock is not necessarily bad news.
Deborah Cunningham, chief investment officer for global liquidity markets at Federated Hermes, explained why investors often welcome divided government.
“The blue wave means the federal government is sure to be divided on most issues,” she said.
“That typically creates a blockade against new legislation, an environment which broad financial markets traditionally view favourably as variables decrease.”
In other words, fewer unexpected policy changes can make it easier for investors to plan ahead.
The sharp decline in oil prices has also encouraged investors to buy government bonds, pushing yields lower.
The benchmark US 10-year Treasury yield fell to a two-month low of approximately 4.85 percent.
Meanwhile, the dollar weakened against major currencies, reaching a one-month low of $1.1273 per euro.
Lower energy prices could also help ease inflation, potentially reducing the pressure on central banks to raise interest rates further.
But not every sector has benefited from the changing political outlook.
Artificial intelligence stocks take a beating in Asia
The technology industry has emerged as one of the biggest casualties of the election aftermath.
Investors are concerned that Democrats could introduce tougher oversight of artificial intelligence infrastructure, particularly the enormous data centres required to support increasingly powerful AI systems.
Several Democratic candidates who campaigned partly on restricting data centre construction secured notable victories in Texas and Georgia.
Their success has raised questions about whether public enthusiasm for rapid AI expansion is beginning to weaken.
Data centres consume substantial amounts of electricity, and their growing demand for power has become a source of concern in communities facing rising energy costs.
Those worries have quickly spread to financial markets.
South Korea’s KOSPI index, which has significant exposure to semiconductor manufacturers, plunged nearly 6 percent on Thursday.
The decline brought the index close to its lowest level in seven months.
Taiwan’s benchmark stock index fell more than 3 percent and was heading toward a weekly loss of approximately 8 percent, potentially its worst performance since April 2025.
Japan’s Nikkei also dropped 2 percent as technology equipment suppliers came under pressure.
However, the broader Japanese Topix index managed to rise 0.8 percent, illustrating how sharply investor sentiment has diverged between industries.
US technology stocks were also facing pressure, with Nasdaq futures falling approximately 1 percent.
Democrats could make life harder for the AI industry
The concern among investors is not necessarily that Democrats intend to stop artificial intelligence development.
Rather, their congressional victory could introduce new political obstacles for companies planning enormous investments in data centres and supporting infrastructure.
Masahiko Loo, chief fixed income strategist at State Street Investment Management, believes the situation is more complicated than a straightforward political attack on the technology sector.
“AI is where the impact becomes more nuanced,” he said.
Democratic lawmakers could intensify scrutiny of electricity consumption, construction projects and the financial consequences for consumers.
However, Trump still possesses presidential veto powers, limiting Congress’s ability to impose sweeping changes without Republican cooperation.
“The blue wave therefore raises the political risk premium around US AI without necessarily derailing the broader AI capex cycle,” Loo explained.
His assessment suggests that the industry could face greater regulatory uncertainty without necessarily experiencing a fundamental slowdown in investment.
For companies whose valuations depend heavily on expectations of continued AI expansion, however, even the possibility of additional restrictions is enough to unsettle investors.
Renewable energy companies emerge as unexpected winners
The election results have also created opportunities in sectors that have struggled to attract investor enthusiasm.
Shares connected to the solar energy supply chain rose sharply as traders anticipated stronger Democratic support for renewable energy.
The prospect of greater political attention to clean energy has encouraged investors to reconsider companies that could benefit from future policy changes.
Elsewhere in Asia, markets with relatively less exposure to semiconductor stocks performed considerably better.
Major stock indexes in India, Hong Kong and Australia recorded strong gains as investors moved money toward areas considered less vulnerable to potential restrictions on AI infrastructure.
The contrasting performances highlight how the same election result can create very different expectations across industries.
For energy companies, the concern is falling oil prices.
For semiconductor manufacturers, it is the possibility of tighter regulation.
For renewable energy businesses, Democratic control of Congress offers the prospect of a more supportive political environment.
Falling oil prices could ease pressure on interest rates
Beyond the immediate market reaction, the sharp decline in energy prices could have important consequences for inflation.
Higher oil prices have increased transportation and production costs, contributing to broader financial pressure on households and businesses.
A sustained reduction in crude prices could help reverse some of those effects.
It could also make further interest rate increases less likely, depending on how inflation develops.
US two-year Treasury yields, which are particularly sensitive to expectations about monetary policy, declined by approximately two basis points to 4.56 percent.
Investors are also watching developments outside the United States.
The Bank of England is expected to announce its latest interest rate decision on Thursday, with markets anticipating an increase intended to counter inflationary pressure from higher energy costs.
However, policymakers may be reluctant to encourage expectations of several additional rate increases next year, particularly if oil prices continue falling.
For now, the financial implications of the Democrats’ election victory remain closely tied to two major uncertainties.
The first is whether the changing political balance in Washington will influence Trump’s decisions regarding Iran.
The second is how aggressively Democrats will pursue oversight of America’s rapidly expanding artificial intelligence industry.
Both questions could shape global markets well beyond the immediate election aftermath.
And while investors are already adjusting their portfolios, the longer-term consequences will depend on whether Washington’s new political balance produces meaningful policy changes or simply another prolonged confrontation between Congress and the White House.
