Pfizer Stock (PFE) Slides After 2026 Guidance: COVID Sales Drop, Patent Cliff and Analyst Forecasts in Focus
Pfizer Inc. (NYSE: PFE) shares fell sharply in U.S. trading on Tuesday, December 16, 2025, as investors weighed the drugmaker’s first look at full-year 2026 guidance, an updated 2025 revenue outlook, and fresh commentary on cost savings and capital allocation.