Democratic Control of Congress Reshapes Market Expectations for AI and Energy Sectors

The U.S. stock market posted its best performance in three months on Wednesday following midterm elections that stripped President Donald Trump’s party of its exclusive control over Washington. The S&P 500 climbed 1.8% during the session, while the Dow Jones Industrial Average gained 1,112 points, or 2.1%, by 10 a.m. Eastern time. The Nasdaq composite rose 2.4%, reflecting a broad shift in investor sentiment toward a political environment with increased legislative oversight.

Market strategists have long argued that corporate earnings and interest rates drive long-term stock prices more than electoral outcomes. Brian Jacobsen, chief economic strategist at Annex Wealth Management, maintained that earnings trump elections. However, the current political configuration appears to align with a scenario preferred by many Wall Street analysts: split control of government. This setup reduces the risk of sweeping economic changes, as a Democratic-controlled Senate and House of Representatives can counterbalance the White House’s authority over defense, foreign policy, and trade.

Sector-specific movements revealed clear winners and losers in the new political landscape. Solar and wind energy companies surged as investors anticipated more favorable regulatory conditions under Democratic leadership. First Solar jumped 11.1%, and Enphase Energy climbed 11.6%. In contrast, the artificial intelligence industry faced pressure from fears of increased regulation. Nvidia, a key supplier of AI chips, slipped 0.5% after an earlier drop of 2.8%. CoreWeave, which rents AI chip access, fell 6.8%. Advanced Micro Devices bucked the trend, rising 3.4% after beating quarterly profit expectations.

Companies closely tied to the White House and former administration figures saw steeper declines. Trump Media & Technology Group dropped 9.5%, extending its year-to-date loss to 55.1%. Elon Musk’s businesses also struggled, with Tesla falling 3.6% and SpaceX sinking 3%. Musk, a former top adviser to the president, is now a potential target for investigations by a Democratic Congress. Carsten Brzeski, global chief of macro at ING Bank, suggested that Trump might become a more restrained leader, focusing on diplomatic wins rather than disruptive policy shifts.

Bond markets reacted to the political shift as well, with Treasury yields easing. The yield on the 10-year Treasury fell to 4.92% from 4.95% late Tuesday. Investors view Democratic control of Congress as a check against further deficit expansion through spending increases or tax cuts. Global markets followed the U.S. rally, with indexes in Paris, Shanghai, and London each climbing 2.2%, 2.2%, and 1.8%, respectively. Japan’s Nikkei 225 was an exception, falling 1.4%. Oil prices also eased, with Brent crude dropping 2.9% to $100.63 per barrel amid ongoing uncertainty regarding the conflict with Iran.