NVIDIA shares experienced significant gains, closing the week with a 15% increase, the largest weekly gain since May 2023. The stock's rise began in premarket trading with a 2% increase following positive earnings reports from Alphabet and Microsoft. Throughout the day, the gains extended, with shares last reported up by 4.3%. Over the past five trading days, NVIDIA's stock surged from $756 to over $880, adding approximately $320 billion in market capitalization. This increase in market cap is equivalent to the entire value of some major corporations.