Business · Markets · 4 hrs ago
US election result lifts stocks, but AI investment worries remain
US stocks rose after Democrats won both chambers of Congress in the midterm elections.
Investors expect the divided government to limit President Donald Trump's spending plans and reduce policy uncertainty.
Past elections have often been followed by gains: the S&P 500 rose in the year after all 17 midterms from 1958 to 2022, while South Korea's KOSPI rose in November after each of seven midterm election years since 1998.
That history supports hopes for a KOSPI rebound, but analysts say economic conditions and company earnings matter more than the election result.
Investors are also concerned that stricter rules for data centers could slow AI infrastructure projects, affecting companies tied to that investment.
Samsung Electronics and SK Hynix are especially exposed because of the KOSPI's reliance on them and concerns about returns from AI spending.
Analysts say delayed projects alone do not prove that memory chip prices will fall, so investors will watch how regulation and AI investment develop.
US stocks rose after Democrats won majorities in both chambers of Congress in the midterm elections.
The Dow Jones Industrial Average gained 3.03% to close at 53,356.12, its biggest rise since April 9 of the previous year.
The S&P 500 rose 1.58% to 7,688.62, while the Nasdaq Composite gained 1.44% to 25,736.51.
Investors welcomed reduced political uncertainty and the prospect that Congress would restrain President Donald Trump’s large-scale spending plans.
Concerns remain that local restrictions on data-center construction and doubts about AI investment returns could weigh on technology and South Korean chip stocks.
- Who
- US investors and South Korean stock-market participants.
- What
- US stocks rose after Democrats won majorities in both chambers; concern remains about AI investment and data-center restrictions.
- When
- The US midterm elections were held the day before the market session on November 4, 2026.
- Where
- The US stock market, with possible implications for South Korea’s KOSPI and semiconductor shares.
- Why
- Investors saw less political uncertainty and expected Congress to constrain Trump’s spending plans, while AI investment profitability and data-center regulation remain concerns.
This story does not have two clearly opposing sides.
Democrats won majorities in both the Senate and the House in the US midterm elections.
The Dow, S&P 500 and Nasdaq rose, with the Dow gaining 3.03%.
Analysts said reduced uncertainty could support stocks, while AI investment and data-center regulation remained risks.
- Dow close
- 53,356.12, up 3.03%
- S&P 500 close
- 7,688.62, up 1.58%
- Nasdaq Composite close
- 25,736.51, up 1.44%
- Democratic result
- Majorities in both the Senate and the House
- Data-center ballot measures
- 28 of 41 measures concerned restrictions on construction
- Sunbury proposal
- Proposed ban on Amazon’s $2 billion data-center project
What people are saying
Uncertainty eased around the election, and stock prices have tended to rebound
Considering the president’s veto power and the strategic importance of the US-China AI competition, it is structurally impossible to stop AI investment itself