Credit: Gerd Altmann/Pixabay. In the early weeks of the COVID-19 pandemic, stock prices plunged, but they have since regained much of their value. Why would stocks rise while the country is paralyzed by a pandemic? As the COVID-19 outbreak spread in March, stock market prices plunged. Then, in a move that seemed irrational to some observers, markets bounced back. Why would stock prices increase even when the number of COVID-19 cases in the country was continuing to rise?