GERMANY - 2026/01/07: In this photo illustration, the Pfizer, Inc. logo seen displayed on a smartphone. (Photo Illustration by Igor Golovniov/SOPA Images/LightRocket via Getty Images)SOPA Images/LightRocket via Getty ImagesIn the last six months Pfizer’s stock (NYSE: PFE) has underperformed Merck (NYSE: MRK) and Johnson & Johnson (NYSE: JNJ) primarily due to waning demand for its COVID-19 products, a significant upcoming patent cliff, and a lukewarm financial outlook for 2026. In contrast, Merck and J&J hav ...