Microsoft adds $450 billion market value on July 30, 2026

Microsoft Corporation added nearly $450 billion in market value on Thursday, July 30, 2026, achieving the largest single-day gain on record for a U.S. company. The surge, which saw its shares close up more than 15 percent, followed the company's release of fiscal fourth-quarter results and a forecast for stronger-than-expected cloud growth, signaling that its massive investments in artificial intelligence are beginning to generate significant returns.

The software giant's market capitalization rose to approximately $3.35 trillion, surpassing the previous record one-day gain of $441 billion set by Nvidia on April 9, 2025. The rally was driven by Microsoft's financial report, which showed Azure cloud revenue surpassing $100 billion for the first time, with Microsoft Cloud revenue rising 27 percent year-over-year to $59.3 billion. Crucially, the company projected that its Azure platform would grow 45 percent on a constant-currency basis in the current fiscal first quarter, well above analyst estimates of a 40.92 percent increase.

Market strategists said the results helped ease widespread investor concerns that heavy spending on data centers and computing infrastructure across the...