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A global selloff in AI-related stocks is dragging Wall Street toward its worst day since the 2025 tariff rout, with the S&P 500 and Nasdaq both slumping Thursday, Korea Times reports. The tech-heavy Nasdaq fell more than 2 percent on AI cost worries, and big tech stocks are on track for their biggest decline since last year's "Liberation Day" rout, the outlet adds. The drop follows a Democratic sweep in the U.S. midterms, which investors fear could decelerate data center build-out, and President Donald Trump reiterated his high-tariff policy, Business Korea reports. Seoul stocks opened sharply lower Friday, tracking the overnight Wall Street rout, with panic selling in Samsung Electronics and SK hynix shares on fears the AI investment cycle may be nearing its peak, Korea Times reports. Korean investors are reacting with alarm, as the benchmark KOSPI opened sharply lower and chipmaking giants saw a wave of selling, the outlet notes.