# Why Sionna Therapeutics Stock Is Crashing 91% to a Record Low

> **Newsylist Open Intelligence Dossier** · First detected: 2026-08-10 22:29 UTC · Category: Business · Sources: 2 · Current Velocity: 0.71

## Multi-Source Evidence Table
| Source Outlet | Headline | Published (UTC) | Verification URL |
|---|---|---|---|
| BioSpace | Sionna’s cystic fibrosis failure is a windfall for Vertex’s blockbuster franchise | 2026-08-10 19:14 | [Source Link](https://news.google.com/rss/articles/CBMivgFBVV95cUxONE1wY0pRR2dXSjdocUR0UnNyTkQ1Q1FtdzhsWGYyejBLLXU5YVBXZ1c0czZ2bWRhbEpyd1h5a1djZTUxck1ZNzZ6UEE4NTU0Y3hjOEVOaTB6NUNwVThkY0txUUJTb0M0YllnZmxZM1lPM3ByaXBvdzZFV3hfV1NNWjljYmVLcmg5eklQdVVwb2ptUFpIZmNlRENSMVMtYzZEOXVRM1lnd3p5a1ZkWmNLZ2MtUDV0VXd3UFNINUxR?oc=5) |
| BioPharma Dive | Sionna cystic fibrosis drug fails key trial, removing threat to Vertex | 2026-08-10 19:14 | [Source Link](https://news.google.com/rss/articles/CBMiogFBVV95cUxQaFB2UTJGNHRGZUJBWnk3a0UydjNPalptZGhSRFVvNzBiQTdCZU5CYld6cjNTLUluZjlraUU1c04tOHFjR0otd2x0ZHNoZ3dOTkhEZi02aUowVWdUZElhWXE1N1pBRkYxWmdxQkhkM3NnTmtmMzZzZF95ZGQ3SVpQYzJDTS1rX1EwRTF3bkNUM1B1eWRCMmVhMmN2WFhjX0Z6blE?oc=5) |

---
*Canonical Source: https://www.newsylist.com/trend/2026-08-10/why-sionna-therapeutics-stock-is-crashing-91-to-a-record-low*
*Synthesized by Newsylist Open Intelligence Engine under E-E-A-T journalistic standards.*