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Corning Stock Sinks 16% Despite Q2 2026 Beat — Weak Q3 Guidance Overshadows 17% Sales Growth

Corning shares plunged as much as 16% after the specialty glass maker's third-quarter guidance fell short of Wall Street targets, overshadowing a strong second-quarter beat. The company posted core earnings of 78 cents per share, up 30% year-over-year, on core sales of $4.74 billion, up 17%, both ahead of estimates. But third-quarter guidance of $4.9 billion to $5.0 billion in core sales and 85 to 89 cents in earnings missed the consensus of $4.99 billion and 85 cents, raising fresh questions about the pace of its AI-driven optical fiber expansion.

Morning Bid: AI Doom Scenarios and Tariff Gloom Cloud U.S. Market Outlook

Market strategists flagged growing concerns over the potential adverse effects of rapid artificial intelligence adoption and renewed tariff policy uncertainty on risk assets. The combination of pessimistic AI disruption scenarios and tariff policy unpredictability has contributed to elevated volatility expectations and cautious positioning among institutional investors.

Global Markets Reel as AI-Driven Tech Selloff Sparks Broad Equity Declines

Global equity markets experienced a sharp selloff on Feb. 4, 2026 as investors digested heightened concerns about artificial intelligence disruption in software and technology sectors. U.S. and European indexes fell, weighed down by steep losses in major tech and software stocks even as safe-haven assets like gold and silver rallied. The selloff was triggered following the release of a new AI tool that traders fear could disrupt traditional business models, prompting a broad revaluation of risk assets.