— Why it moved
Why QTTB Stock Doubled Today — July 13, 2026
Positive hair-loss trial data doubled Q32 Bio overnight — but the alert fired after the gap, so the real lesson is about what a gapped stock has left to give.
What moved QTTB stock
Q32 Bio is a clinical-stage biotech developing bempikibart, an antibody aimed at severe alopecia areata — a form of autoimmune hair loss. Before the bell it reported 36-week data from Part B of its SIGNAL-AA Phase 2a study: a 35.3% mean reduction in the SALT hair-loss score and a 40% SALT-20 response rate. Positive, durable data in a condition with few options is a genuine re-rating catalyst, and the stock gapped from around $11 to over $20 overnight.
The mechanics
This is the difference between a good story and a good entry. The float is only about 2.6 million shares and short interest ran near 26%, which is why a data print sent it vertical — but that all happened before the market opened. By the time regular trading started, the move was largely spent.
QTTB by the numbers
The alert window
Stock Pulse flagged QTTB at $20.77 at 7:01 AM, in the premarket. The intraday high — $22.50 — came at 12:38 PM. That's a long clock, but a shallow one: from the alert the stock only had about 8% left in it. The overnight gap took the meat of the move; the session was a grind, not a launch.
How QTTB's move ended
It held the gap and closed at $21.37, up 2.9% from the alert and roughly double on the day. That's the honest read: real, positive news, but a stock that did its moving while you were asleep.
The tell: a stock that gaps 85% on data has already priced the news — the alert on a post-gap name is a "did I miss it" signal more than a "here it goes" one.