Why Moderna (MRNA) stock is trading lower today

Shares of biotechnology company Moderna (NASDAQ:MRNA) fell 22.7% in the afternoon session after the company's partial Phase 3 data for its personalized cancer vaccine leaked ahead of a planned presentation this weekend, and the stock sold off hard even though the results themselves look positive. According to CNBC, shares fell as much as 25% after an early look at the vaccine Moderna is developing with Merck, intismeran autogene, showed up online before it was supposed to be presented at the Eur

Oct 23, 2026 - 09:00
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Why Moderna (MRNA) stock is trading lower today
Shares of biotechnology company Moderna (NASDAQ:MRNA) fell 22.7% in the afternoon session after the company's partial Phase 3 data for its personalized cancer vaccine leaked ahead of a planned presentation this weekend, and the stock sold off hard even though the results themselves look positive. According to CNBC, shares fell as much as 25% after an early look at the vaccine Moderna is developing with Merck, intismeran autogene, showed up online before it was supposed to be presented at the Eur

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