Democrats’ midterm sweep rattles Asian AI, chip stocks

Asian technology shares swung sharply on Wednesday, November 4, 2026, as results from the U.S. midterm elections showed Democrats winning majorities in both the Senate and the House. Investors sold AI and semiconductor stocks on fears that a Democratic Congress could bring tighter regulation and slow the data-center buildout behind the region's chip rally. Many benchmarks recovered much of the early loss by the close, according to Dow Jones reporting via Morningstar.morningstar.com

Steep drops, then a rebound

Japan's Nikkei 225 fell more than 3% to a three-month low as trading resumed after a public holiday. It then recovered some ground and closed 1.42% lower at 62,188.63, DPA reported. SoftBank Group, an OpenAI investor, fell as much as 8% at one point, according to Euronews via Yahoo Finance, and ended 3.2% lower, the Associated Press reported. Kioxia Holdings dropped 5.4%, though the AP noted that its quarterly guidance also missed expectations. Advantest and Tokyo Electron fell as well.finance.yahoo.com+2

South Korea's Kospi fell deep into the red during the session before ending 0.62% higher at 5,683.80, as battery and pharmaceutical shares rose, DPA reported. Samsung Electronics and SK Hynix ↘ 10.01% were up in early trading but closed slightly lower, Chosun Biz reported. TSMC Taiwan Semiconductor Manufacturing Company Limited ↘ 8.62% slipped 1.5%. Analysts quoted by Dow Jones said the afternoon rebound probably reflected relief that the outcome was now clear, as U.S. futures tied to the Nasdaq cut their losses.biz.chosun.com+1

Regulation and data-center worries

Investors worried that Democrats could pursue federal probes and new rules aimed at Big Tech, AI and crypto, The Chosun Ilbo reported. "Democratic control of Congress is a headwind for tech stocks," Longbow Asset Management CEO Jake Dollarhide said. Saxo said the result raised concerns about closer oversight of AI and possible limits on data-center development.chosun.com+1

The governor's races in Texas and Georgia drew particular attention, because states control data-center permits and grid connections. Moomoo strategist Tapas Strickland said the two states account for roughly one-third of AI data-center spending. If both elect Democratic governors, he said, "the likelihood of a moderation in pace is very high," according to Chosun Biz.biz.chosun.com

Limits on near-term change

Some analysts doubted the election would change policy much in the short run. "The party still lacks a filibuster-proof majority in the Senate and President Trump has veto power to block legislation," Stephen Brown of Capital Economics said, as quoted by the AP. UBS's Mark Haefele said earnings, AI investment and interest rates "should remain more important market drivers," Dow Jones reported. Daiwa Asset Management's Kazunori Datebe said Japanese AI stocks "are already cheap," so "the downside should be limited."news4jax.com+1