Dollar slides, solar soars as Democrats sweep Congress

Key Points

1. Global markets pared early losses after Democrats won control of both chambers of the US Congress.
2. Tech stocks and the dollar fell; Treasuries, gold and Asian solar shares rallied sharply.
3. Investors are repricing Trump's deregulation, tax and AI agenda against a hostile but veto-constrained Congress.

The latest:

Asian tech stocks and the dollar came under heavy pressure before recovering much of the damage, as investors digested a Democratic sweep of the US Congress and what it means for President Donald Trump’s economic agenda. Treasuries rallied across maturities, solar shares jumped by double digits, and copper extended losses. Bloomberg reported the swing reflected bets on tighter oversight of AI, tax and spending plans.

Details:

• The equity swing: Japan’s Nikkei 225, heavily weighted toward technology, led the retreat with a drop of about 5% before trimming losses, according to Bloomberg. South Korea’s Kospi erased a decline of as much as 4%, with Samsung Electronics and SK Hynix each down around 1%, while Taiwan’s Taiex narrowed its loss to 0.8%.
• The AI read: Investors are weighing tighter scrutiny of the technology sector and possible delays to US data center construction, Bloomberg reported. Candidates from both parties made data centers a campaign issue, compounding concerns over the scale of AI spending and the returns it is expected to generate.
• The counterargument: Tomo Kinoshita, global market strategist at Invesco Asset Management, said expectations of Democratic control stoked fears of tighter AI regulation, pressuring related shares across Asia. He added the reaction looked overdone: “Even if the next Congress passes legislation to tighten AI regulation, President Trump can still veto it.”
• Clean energy rally: Solar names surged on bets the sweep could slow or reverse some Trump measures targeting clean energy projects. South Korea’s Hanwha Solutions rose as much as 22%, while HD Hyundai Energy Solutions and OCI Holdings each gained at least 12%, Bloomberg said. On the Blue Ocean platform, Enphase and SolarEdge climbed as much as 12%, First Solar 11% and Sunrun 8.7%.
• Currency moves: The dollar weakened against every G10 currency on concern the sweep could erode the appeal of US exceptionalism, particularly if heavier oversight of AI investment weighs on growth. The Bloomberg dollar index fell as much as 0.4%, its steepest drop in a month, while the Swiss franc and Japanese yen gained as relative havens.
• Bond bid: Treasuries advanced with yields falling across maturities, on wagers that Democratic control constrains Trump’s tax and spending agenda and reduces the odds of fiscal stimulus and heavier government borrowing. Five-year yields dropped as much as 9 basis points to 4.68% and 10-year yields fell 7 basis points to 4.89% before paring.
• Crypto hit: Bitcoin fell as much as 2.8% to below $76,000 as results emerged, with Solana also lower, before most losses were erased. Digital assets were already strained by outflows from bitcoin exchange-traded funds and fallout from a record hack of the Binance platform last week.
• Oil and Iran: Crude held recent declines as investors assessed prospects for renewed US-Iran peace efforts, with Brent trading near $104 a barrel. Bloomberg said that offers relief to energy-importing Asian economies, though concern persists over renewed US strikes after the midterms.
• Copper pressure: The metal extended losses, falling as much as 1.5% Wednesday, as the results amplified risk aversion and raised questions over two pillars of this year’s rally: the AI investment boom and Trump’s proposed tariffs on refined copper, which drew huge volumes into the United States and helped push prices to records.

Between the lines:

The recovery in Korean and Taiwanese shares points to the limit investors landed on: a Democratic Congress can intensify oversight of data centers and challenge parts of the economic agenda, but the presidential veto blunts sweeping legislative change. The same constraint applies abroad, where lawmakers can pressure the administration without setting military or foreign policy.

What’s next

Watch whether Treasury yields hold their declines, whether solar gains survive the US cash session, and whether diplomatic contacts between Washington and Tehran advance or give way to renewed strikes now that the midterms are over.