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mRNA stocks swing wildly on melanoma trial news with no new data Friday

Market News
21 Aug 2026
24/7 Wall Street
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Bullish
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Moderna and BioNTech stocks experienced sharp volatility for a third day following a Phase 3 melanoma trial success involving Moderna's mRNA vaccine combined with Merck's Keytruda. Despite no new clinical data Friday, Moderna's shares surged 8%, continuing a pattern of large swings driven by investor repositioning around this single trial result. The full dataset is expected at the ESMO conference in late October, which could further influence the mRNA trade. This volatility is isolated within biotech stocks, not linked to broader market moves, and reflects high retail interest and speculative trading.

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