Sales of Biogen’s BIIB key multiple sclerosis (“MS”) drugs like Tecfidera and Tysabri and spinal muscular atrophy (SMA) treatment, Spinraza, are being hurt due to competitive pressure, which is ...

People walk past the Nasdaq market site as U.S. stock markets opened Tuesday following Monday’s broad sell-off in New York City, U.S., March 11, 2025. REUTERS/Mike Segar/File photo ...