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US Stocks Today | Big tech faces valuation reset as AI spending scrutiny rises

US tech giants are facing a sharp valuation reset in 2026 as investors question whether massive AI spending can deliver adequate returns. Stocks like Microsoft, Amazon, Nvidia and Alphabet have fallen, while firms with stronger earnings visibility, such as TSMC and Samsung, have gained, signalling a shift in market sentiment.

17 Feb 2026 10:12 am