
Moderna has always been a stock driven by narrative extremes. During the pandemic, it traded as if mRNA would transform medicine overnight, with its market capitalization peaking near $200 billion. Shares exploded 177% in a single session on Wednesday—the largest one-day surge for an S&P 500 company in over two decades—after Moderna and partner Merck reported successful late-stage trial results for their personalized mRNA melanoma vaccine.






















