Stocks Rally Then Retreat as Democrats Take Control of Both Congress Chambers

U.S. stock markets swung sharply on Wednesday following the midterm election results, with major indexes posting large gains before giving back some of that value by Thursday afternoon. The Dow Jones Industrial Average rose nearly 1,600 points after Democrats secured control of both chambers of Congress. The S&P 500 and Nasdaq also climbed, though the rally did not hold as the day progressed.

Gerald Cohen, an economist at UNC's Kenan Institute, attributed the initial market boost to reduced uncertainty regarding government policy. He noted that financial markets have historically favored divided government because it limits the ability of any single party to enact drastic policy shifts.

"Historically the markets have liked when there is shared power in government because that means that no party is able to do very, you know, kind of wild things," Cohen said. "And so I think the view is gridlock is good to the financial markets."

The new political balance may also influence trade policy. The Trump administration's tariffs and ongoing trade disputes have created uncertainty for investors. A shift in control within Congress could alter the direction of these policies in the months ahead. Energy prices remain a separate concern for consumers, as the war in Iran has pushed oil and gas costs higher.

The election results also carry implications for the artificial intelligence industry, particularly regarding data center construction. Democratic candidates campaigned on increased regulation of these facilities. Texas Governor-elect Gina Hinojosa called for a moratorium on new data center approvals. U.S. Senate candidate James Talarico proposed tighter rules on the industry's use of energy, water, and infrastructure.

Cohen warned that a slowdown in data center construction could have negative economic consequences because the AI buildout has been a primary driver of recent growth. "My calculations are that since, over the last year, over half of economic growth is accounted for because of this AI buildout," Cohen said. "And so that could have a negative impact on the economy."

However, Cohen suggested that slowing the rapid expansion of data centers could provide benefits if it allows resources and investment to flow back into other parts of the economy. The long-term effect on consumers and markets will depend on how the new balance of power in Washington handles trade, regulation, and spending.