Merck (MRK) Stock: What to Know Before the Market Opens on Dec. 22, 2025
Dateline: Dec. 22, 2025 (pre-market) — Merck & Co., Inc. (NYSE: MRK) enters the new week with a fast-moving mix of policy headlines, FDA acceleration news, and shifting analyst sentiment—all landing on top of the company’s longer-running story: strong near-term