Pfizer (PFE) Stock After Hours on December 9, 2025: Obesity Pill Deal, RSV Questions, and What to Watch Before the Opening Bell
Pfizer Inc. (NYSE: PFE) finished a volatile Tuesday session on December 9, 2025 under pressure, then stabilized in after-hours trading as investors digested a big new obesity-drug licensing deal and fresh headlines around RSV therapies. With the next U.S. market session opening on December 10, 2025, traders in Pfizer stock are lining up the key catalysts that could drive PFE’s next move. How Pfizer Stock Traded on December 9, 2025 During regular trading on December 9, Pfizer shares slipped again: The weakness continues a choppy pattern for Pfizer stock in late 2025, with shares trading closer to the bottom half