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YahooAugust 11, 2026 at 11:41 PM NY23 days ago

One Company’s Clinical Miss Is Another’s Moat: Vertex Rallies as Sionna’s CF Bet Collapses

Cystic fibrosis investors came to learn a harsh lesson on August 10 about how concentrated a market can be: Sionna Therapeutics, Inc. (NASDAQ:SION) shares fell more than 90% following a key trial failure, while Vertex Pharmaceuticals (NASDAQ:VRTX), the company whose drug dominance Sionna was attempting to challenge, surged to new highs. The Pipeline Flop Sionna […]

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