Microsoft Loses $381B in Two Days as AI Spending and OpenAI Dependence Spook Investors

Microsoft (MSFT) shed approximately $381 billion in market value over two trading days following its fiscal Q2 earnings release on January 30, 2026—the worst weekly performance since March 2020—despite reporting revenue of $81.3 billion (+17% YoY) and EPS of $4.14, both above estimates. Investors focused on two red flags: Azure cloud growth slowed to 39% from 40% the prior quarter, and capital expenditures surged 66% to $37.5 billion, with full-year spending projected to exceed $100 billion, primarily for AI infrastructure. Analysts question the sustainability of outpacing revenue growth with ballooning costs. GuideStone Funds’ Josh Chastant noted markets now demand “proof of monetization, not promises.” Further concern stems from Microsoft’s reliance on OpenAI: 45% of its $625 billion remaining performance obligation (RPO) is tied to the still-unprofitable startup. Broader tech selloffs, including Meta and Oracle, reflect a sector-wide shift toward profit discipline as active funds rotate into cyclical sectors.