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AI Frenzy Triggers Wild Swings in Emerging Markets as Concentration Risk Surpasses the U.S., Eroding Diversification Benefits - finance.biggo.comfinance.biggo.com · Fri, 07 Aug 2026 18:45:00 GMTU.S. and Korean tech stocks are now tightly linked — and that could be a worry for investors - CNBCCNBC · Mon, 27 Jul 2026 07:00:00 GMT