GOSS up 8206.2% on Sep 11 2026 with no filing that explains it
GOSS+8206.2%on Fri Sep 11 2026
Gossamer Bio, Inc. Common Stock was up 8206.2% on the day at $12.26, ranked #59 on — its usual five-minute volume, when TapeRank recorded this unexplained move at 09:31 ET during regular hours.
WHAT THE ROW LOOKED LIKE
LAST12.26
DAY▲ 8206.2%
5 MIN▲ 1.24%
5M RVOL—
5M $VOL$217K
FLOAT—
RANK#59
SESSIONREGULAR
AI VERDICT
UNEXPLAINEDCONFIDENCE4/5
The reported +7440% move is a mechanical artifact of a 1-for-80 reverse stock split that took effect this week, not a genuine price move reflecting new information. The 5-minute reversal of nearly 11% alongside thin, choppy volume suggests price discovery and order-flow noise following the split adjustment rather than any fresh catalyst.
WHYA reverse split mechanically re-bases the share price by 80x, which fully explains the reported percentage gain, while the underlying business news is nonexistent, so the true catalyst-driven move is effectively zero.
ANALYZED 09:34 ET · <1 MIN AGO · ANTHROPIC/CLAUDE-SONNET-5
FILINGS · 24H BEFORE THE MOVE
No SEC filings in the 24 hours before this was recorded. A move on an unfiled press release shows nothing here, which is what UNEXPLAINED means.
SESSION LEVELS AT CAPTURE
VWAP12.30
HOD13.25
LOD8.03
OR HIGH12.52
OR LOW12.00
PREV CLOSE0.1476
PM HIGH13.25
PM LOW8.03
GAP▲ 8355.28%