On Monday, Pfizer Inc. (NYSE:PFE) stock is trading higher with a session volume of 31.16 million as per data from Benzinga Pro. Activist investor Starboard Value has invested approximately $1 billion in Pfizer as the pharmaceutical giant grapples with a downturn in demand for COVID-19 vaccines and treatments. In another positive development, Pfizer won a bid in a London court to invalidate two of GSK Plc’s (NYSE:GSK) patents relating to its respiratory syncytial virus (RSV) vaccine. Also Read: UK Chooses Pfizer Over GSK for Multi-Million Dose RSV Vaccine Contract. Pfizer and GSK are competing …