Nvidia's board authorized an additional $80 billion share repurchase program as the chipmaker becomes the first company to surpass $5 trillion in market cap.

Shares in Nvidia will come under scrutiny tonight as the chipmaker attempts to justify one of the biggest stock market rallies ever seen

Nvidia's soaring revenue highlights the escalating demand for AI infrastructure, raising questions about sustainability and geopolitical risks.

Chip giant Nvidia on Wednesday posted record quarterly revenue of $81.6 billion, blowing past Wall Street forecasts as insatiable demand for its artificial intelligence hardware…