Moderna headquarters, exterior view, Cambridge, Massachusetts, USA. (Photo by: Plexi Images/GHI/UCG/Universal Images Group via Getty Images)UCG/Universal Images Group via Getty ImagesModerna stock has lost 91% of its value since peaking during the pandemic, notes TradingView.But a reversal of fortune could be in the offing after shares of the Covid vaccine giant added 16% on January 21 following positive news on results from a skin cancer vaccine developed through a partnership with Merck, according to Reu ...