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The Nasdaq fell 2.6% on Thursday as AI investment concerns and rising oil prices dragged down tech stocks, with the semiconductor index dropping 6.7%, according to the Korea Economic Daily. This followed a 2% decline the day before, triggered by weak earnings from Tesla and Meta that failed to ease AI-related worries, as reported by the Korea Times. The sell-off spread to Seoul, where the KOSPI opened 2.36% lower Friday and plunged over 3% Thursday on profit-taking in chip shares amid persistent AI value-chain concerns, per the Korea Times and Yonhap. Korean investors are reacting with caution, as the AI-driven market jitters have also hit SoftBank, whose market value has halved since June on AI debt fears, Business Korea reports.