US stocks tumble as semiconductor index sinks 11%; Nvidia, AMD lead tech sell-off - CNBC TV18

US equities fell sharply as the semiconductor index dropped 11%, with Nvidia and AMD leading a broader technology sell-off, according to CNBC TV18. The move points to a repricing of growth expectations concentrated in AI-linked chip names, where elevated valuations leave prices highly sensitive to any shift in demand outlook or earnings forecasts. Because semiconductors carry heavy weight in the S&P 500 and in the Nasdaq, the drawdown transmits quickly into index-level performance and tightens risk appetite across high-multiple growth equities. Nvidia and AMD are the most directly exposed, given their dependence on data-center and AI accelerator spending, while the S&P 500 reflects the spillover into its large technology weighting. Traders should watch the next round of hyperscaler capital expenditure guidance and the upcoming US CPI release, since any signal of cooling AI infrastructure spending or renewed inflation pressure could extend the pressure on chip valuations.

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