Shares of COVID-19 vaccine developer Vaxart (NASDAQ: VXRT) and coronavirus diagnostic test manufacturers Opko Health (NASDAQ: OPK) and Quidel (NASDAQ: QDEL) plunged more than 35% in August, according to data provided by S&P Global Market Intelligence.
Vaxart's shares were down 36.9%, Opko's fell 37.1%, and Quidel's dropped 37.7% for the month. Even with those big drops, however, the companies' stocks have more than doubled in price year to date. Opko's and Quidel's shares are up more than 100% so far in 2020, while Vaxart's have risen a jaw-dropping 1,300%.
Image source: Getty Images.