 Shares of Novavax Inc. NVAX, -3.17 were up 2.4 in premarket trading on Friday after the company said its COVID-19 booster was authorized for adults in Canada who were previously immunized with Novavaxs protein-based vaccine. The companys stock is down 85.4 this year, while the SP 500 SPX, -0.31 has declined 17.2. 