Coinspeaker NVAX Stock Jumped 25% Yesterday, Down 15% Now as Novavax Works on COVID-19 VaccineNovavax (NVAX) stock climbed 25% yesterday, adding to its current 2020 gains, as the company makes progress on its COVID-19 vaccine candidate. However, today NVAX is 14% down.NVAX Stock Jumped 25% Yesterday, Down 15% Now as Novavax Works on COVID-19 Vaccine