Microsoft Market Cap Surges $450B in One Day, Breaking US Stock Record

MSFT stock jumped 15.5% on strong earnings, adding $450B to market cap and surpassing Nvidia’s previous record single-day gain.

Woofun AI reports that Microsoft shares rose 15.5% at Thursday's U.S. market close, representing the company's fourth-largest one-day gain in history. This movement increased the firm's market capitalization by $450 billion, exceeding Nvidia's $440 billion single-day gain recorded on April 9, 2025, to establish a new record for U.S. stocks.

The rally followed a robust earnings report, reversing recent negative sentiment surrounding AI-related equities. Consequently, Microsoft's year-to-date cumulative loss contracted from approximately 19.3% at Wednesday's close to 5.8%.