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Nvidia shares rose as much as 27% in June, boosting its market capitalization to $3.34 trillion, before giving up some of their gains later in the month, due to profit booking and concerns over its high valuations.
Meanwhile, Amazon.com Inc hit $2 trillion in market value last month, becoming the fifth U.S. company to achieve the milestone, riding on AI-influenced enthusiasm.
Broadcom Inc's market capitalization jumped about 20% last month after it increased its annual revenue forecast for AI-related chips by 10% and announced a stock split to capitalize on this year's rally in its shares.