Democrats' midterm victories trigger selloff in AI tech stocks

US tech stocks tumbled on Thursday after the Democrats swept the midterm elections and seized full control of Congress, sparking a sharp sell‑off on the Nasdaq where AI‑linked giants such as Alphabet, Nvidia, Meta and Apple trade. The drop came as investors reacted to fresh worries that the new political landscape could bring tougher rules on data centres, the backbone of the artificial‑intelligence boom.

The sell‑off reflects a broader shift that began when OpenAI released ChatGPT in late 2022, igniting a modern‑day gold rush for AI. Money poured into chip makers, networking firms, data‑centre developers and energy providers that power the massive computing clusters. That surge pushed tech valuations higher and kept the sector in the spotlight through 2023. Yet the rapid inflow of capital has also raised concerns that the market may have over‑priced the industry’s growth prospects.

Investors are now factoring in several risk signals. Goldman Sachs projects AI‑related spending could hit $1 trillion by 2026, but that scale has already squeezed borrowing costs for other sectors. Public warnings from AI researchers about safety and even existential threats have added to the unease. A May Gallup poll showed 71 % of Americans would oppose a new data centre in their neighbourhood, a higher resistance than for nuclear plants. Democrats such as Texas Senate newcomer James Talarico have echoed those community concerns, arguing that unchecked data‑centre expansion could raise water and electricity bills, generate noise, and strain local land use.

Analysts say the market will watch closely how Congress moves on AI regulation. If lawmakers impose stricter limits on data‑centre construction or introduce broader AI oversight, the sector could face higher compliance costs and slower growth, keeping the Nasdaq under pressure. Conversely, a balanced approach that addresses community impacts while preserving innovation could restore investor confidence. For now, the sell‑off serves as a reality check on the AI hype, reminding investors that political shifts can quickly reshape market expectations.