US stocks dropped on Tuesday as jitters over highly elevated valuations for many artificial intelligence companies intensified and top Wall Street executives said markets were vulnerable to a pullback.
The blue-chip S&P 500 closed 1.2 per cent lower, while the tech-heavy Nasdaq Composite fell 2 per cent. The healthcare and consumer staples sectors, often viewed as a shelter in shaky markets, posted modest gains.
Major cryptocurrencies were swept up in the sell-off, with bitcoin briefly falling below $100,000 a token for the first time since June. Gold slipped 1.6 per cent to $3,935 a troy ounce.
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