Stock Market Today: Nasdaq Plunges To 4-Week Low; Metals Firm Kaiser Hits New Entry (Live Coverage)

US stocks today: Nasdaq plunges 2% as tech earnings spark AI spending worries

Nasdaq plunged 2% as Alphabet and Tesla disappointed on earnings with high AI spending, while oil topped $100 amid geopolitical tensions. For tech CIOs, the signal is clear: foundation model capex must now justify faster ROI—budget scrutiny on AI deployments will intensify.