Led by Jensen Huang, dubbed the 'Taylor Swift of tech', the chip giant has become pivotal in the race for AI supremacy.

Nvidia did not warn at least some major customers in advance about new U.S. export rules it was told about a week ago requiring it to obtain licenses to sell its China-focused artificial intelligence chip,

Nvidia shares are tumbling Wednesday as the firm said it expects to take a $5.5 billion first-quarter charge after the U.S. limited exports of its artificial intelligence chips to China. AMD expects an $800 million charge and its stock also is falling.