Investors still only see upside for Nvidia as the poster child for the AI boom.

Shares in the chip-maker have surged in value as investment in AI continues to gather pace.

Nvidia bypassed Apple and Microsoft, the only other US firms with a market value of more than $3 trillion.

The chip giant briefly passed $4 trillion in market value, leading the wave of artificial intelligence stocks.

Investors still only see upside for Nvidia as the poster child for the AI boom.