Sionna Therapeutics, Inc. (SION) by event type
SION moves most on coverage initiations — a median of +0.70% at 30 minutes across 30 measured events. Each row is measured over the last three years and read against the price at its own news timestamp. Back to the SION overview →
How SION reacts across 3 measured event types.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst downgrades 967 of 2,603 | 26 | +0.12% | 50% | +4.30% |
| Coverage initiations 260 of 2,283 | 30 | +0.70% | 77% | -1.35% |
| Rating reiterations 2,881 of 3,522 | 30 | -0.18% | 47% | +0.56% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The rank under each event type orders every name measured for it by median 30-min reaction, most positive first — so a low rank on a downgrade means this name falls harder than most, not that it moves less. Names with an identical median share a rank; a name the cross-section does not carry shows no rank rather than a guessed one. 2 further classes were observed with fewer than 10 measured events and are not published.
That’s how SION usually reacts — get an email when it moves on news →Every name measured for these event types: Analyst downgrades → · Coverage initiations → · Rating reiterations → · SION overview →