Coinspeaker MRNA Stock Up 16%, Moderna Confirms Its Covid-19 Vaccine Produces Neutralizing AntibodiesModerna (MRNA) stock price is rising. The rally is fueled by the company's announcement that its COVID-19 vaccine candidate produced neutralizing antibodies in all 45 participants.MRNA Stock Up 16%, Moderna Confirms Its Covid-19 Vaccine Produces Neutralizing Antibodies