Merck (MRK) Stock News on Dec. 25, 2025: BMO Lifts Target to $130 as FDA Fast-Track Vouchers and Keytruda Data Fuel Momentum
December 25, 2025 — Merck & Co., Inc. (NYSE: MRK) is ending 2025 with something investors tend to enjoy: momentum with a story behind it. Even with U.S. markets closed for Christmas Day, Merck shares are in focus after a late-December climb that pushed the stock to fresh highs, helped along by a major Wall Street upgrade and a burst of pipeline and regulatory headlines. MarketBeat Below is what’s moving Merck stock, what the latest MRK forecasts imply for 2026, and the near-term catalysts (and risks) that could decide whether this rally is the start of a new chapter—or just