Nvidia shares traded higher in the premarket Tuesday, as traders reassessed the implications of a much cheaper-to-build large-language model for the artificial intelligence trade.The chipmaker's rebound in the early session was shaky,

Nvidia Corp., the poster child of the AI frenzy, sank 17 per cent and headed toward the biggest market-cap loss for a single stock in market history. The AI leader wiped of $500 billion of its market value and shed 21 per cent off its stock price in two days.