Tech stocks suffer worst week since April after $800bn AI sell-off
Nasdaq falls 3% over the five-day period as investors worry about sky-high valuations
Nasdaq falls 3% over the five-day period as investors worry about sky-high valuations

Cautious comments from top bank executives add to jittery sentiment on Wall Street

Nasdaq lower as heavyweights including Nvidia and Microsoft sustain steep falls

Decline in Asian markets led by companies most exposed to demand for artificial intelligence

Weak private sector jobs data adds to nerves over elevated valuations for AI-linked companies

Investor concerns over lofty valuations for artificial intelligence companies hits sentiment

Nasdaq climbs after sell-off fuelled by worries over vast AI spending