Microsoft has reached a $4 trillion market cap, becoming only the second company to achieve this milestone. Investors drove the stock up 4.62% following the company's fourth-quarter earnings report, which showed strong growth in cloud-computing services fueled by artificial intelligence demand. Microsoft's Azure cloud business generated $75 billion in annual revenue, representing a 34% increase from the previous fiscal year.

Nvidia became the first company to reach the $4 trillion market cap earlier this month.

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