PFE ▼ -0.9% - Pfizer Inc. $PFE Pfizer and BioNTech Receive U.S. FDA Approval for XFG-adapted COVID-19 Vaccine Pfizer shares declined 0.9% despite receiving FDA approval for an XFG-adapted COVID-19 vaccine developed with BioNTech. The regulatory clearance typically represents a positive development for a pharmaceutical company, though the modest decline suggests investors may have already priced in this approval or harbor concerns about the commercial outlook for updated COVID vaccines as public demand continues to normalize. 27-AUG-2026 04:30 PM ET