Microsoft shares surged by over 15% on Thursday, adding nearly $450 billion to its market capitalization—the largest single-day gain for any company in history. The rally followed robust quarterly results that surpassed analyst expectations, driven primarily by strong performance in its Azure cloud and AI divisions. Investors reacted positively to projections of 45% growth in Azure, signaling that the company’s massive infrastructure investments are finally yielding tangible revenue. This rebound eases prior market concerns regarding the sustainability of the firm’s AI spending strategy.