📝 Executive Summary
Microsoft's stock tumbled, extending losses as AI competition and growth fears mount, making it the largest single-stock drag on major U.S. equity indexes. The sell-off in Microsoft, a top-weighted component of the S&P 500 and Nasdaq Composite, pulled both benchmarks lower even as other sectors held steady. Analysts flagged decelerating Azure growth and heavy AI capital spending as key culprits behind the bearish shift in sentiment.