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US stocks rallied Wednesday after Democrats won both chambers of Congress, as investors weighed limits on President Donald Trump's economic agenda. The Dow Jones Industrial Average climbed more than 1,500 points, while the S&P 500 gained 1.58% and the Nasdaq Composite rose 1.44%. Oil fell, and Treasury bonds advanced as markets reassessed the election's effect on trade, spending, borrowing, and foreign policy.
The gains followed an early sell-off. The S&P 500 posted its strongest advance in three months, while the Dow rose about 3%. Although Trump has promoted tax cuts and deregulation, investors focused on whether Congress could curb abrupt policy changes. Why did Wall Street welcome an election result that weakened his political position?
A Democratic majority could make tax, spending, and regulatory legislation harder for Trump to pass. That prospect appealed to investors concerned about tariffs and deficit-funded spending. Markets saw divided government as a possible barrier to sudden changes rather than a rejection of business-friendly policies.
The result creates a hurdle for the administration's economic plans. Investors expect greater scrutiny of borrowing and may reassess the prospects for new spending measures over the coming months. Yet congressional control does not settle how the White House will approach trade decisions or respond to political opposition.
Defence policy faces similar uncertainty. Contractors came under pressure as investors questioned whether Trump's proposed USD 1.5 trillion defense budget could win congressional support. Meanwhile, the election raised questions about US policy toward Iran and the government's next steps in the conflict.
Trump acknowledged that the war contributed to the Republican defeat. Investors will watch for signs of a policy change, although the election does not guarantee a diplomatic breakthrough. Any shift could affect energy prices and the inflation outlook.
Democratic control of Congress has renewed attention to oversight of artificial intelligence, technology companies, and digital assets. Investors worry tougher rules could complicate expansion plans as companies invest heavily in AI infrastructure.
That concern extends to data center construction and power use. Restrictions on facilities or closer scrutiny of energy use could slow projects. The market response therefore differed between established technology businesses and operators tied to computing capacity.
Microsoft, Amazon, Alphabet, and Meta advanced as investors considered whether slower infrastructure growth might favour cloud businesses. In contrast, Hut 8, IREN, and Core Scientific and Applied Digital faced selling pressure as concerns about construction and capacity weighed on sentiment.
The semiconductor index fell 3.1%, reaching a six-month low, even as US stock benchmarks rose. Tesla declined too. The split showed investors assessing the election's effects on industries, not simply buying every major stock.
Read More: Wall Street Slides as AI Stocks Sink and Oil Prices Surge
Oil recorded one of the sharpest moves. Brent crude dropped more than 8% Wednesday to settle near USD 95 a barrel, while US crude fell too. Investors linked the sell-off to hopes that pressure could encourage Trump to end the Iran war.
Lower fuel costs could ease expenses for consumers and businesses. They might reduce inflation and give central banks more room to consider interest-rate cuts if price pressures ease further. Those expectations depend on events in the Middle East, where escalation could push energy prices higher.
Government bonds gained alongside stocks. The benchmark 10-year Treasury yield fell to about 4.89% as demand strengthened, since bond prices rise when yields fall. Investors considered whether Congress might block deficit-expanding legislation and reduce the need for government borrowing.
With US debt near USD 40 trillion, future Treasury issuance and the costs of servicing government debt remain concerns for bond markets. Investors were also weighing whether tighter AI regulation could slow investment and growth, ease inflation and reduce the case for further Federal Reserve rate increases.
The Democratic sweep coincided with gains in US stocks and bonds, while oil prices slid. Investors weighed possible restraints on Trump's spending and trade policies against tighter oversight of AI companies. The White House response and developments in Iran remain central to expectations for energy, inflation, and borrowing costs.