Futures for major U.S. indexes pointed down before the opening bell on Tuesday, while global markets mostly tumbled. Japan's Nikkei lost 3.6 per cent and South Korea's KOSPI lost 10 per cent, while European markets had somewhat smaller swings.

Key U.S. tech stocks slumped in premarket trading after a massive selloff in AI and tech stocks in Asia.

(Bloomberg) -- Global stocks fell, led by steep losses in South Korea, as investors pulled back from some of this year’s top-performing tech companies on concern they’ve rallied…

Wall Street futures plunged Tuesday, led by tech and chip stocks, as investors braced for potential U.S. interest rate hikes and fretted over soaring AI-related spending financed…

The Nasdaq dropped 2.2% amid steep falls in major semiconductor stocks.