Hindsight Markets Recaps Small-cap stocks on September 14, 2026
GTBP, September 14: a run to $11.98
GTBP opened near its previous close, then ran to $11.98 during the session.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $8.69, on 3K shares.
The open
It opened near its previous close, at $8.69. It ran to $11.98 by 3:36 p.m.
The close
It closed at $11.85, near its high.
What to take from it: The move came during the session, not at the open.
The details
How it traded, step by step
Intraday run. It opened up 0.9% at $8.69, then ran from the open to the high of $11.98 in 366 minutes.
| Time (ET) | What happened |
|---|---|
| 7:00 a.m. | Pre-market high, $8.69 |
| 9:30 a.m. | The open: $8.69, up 0.9% from the previous close |
| 1:20 p.m. | First trade 20% above the previous close of $8.61 |
| 3:36 p.m. | High of the day to the close, $11.98 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $11.85, 1.1% below the high |
The shape's name comes from a fixed rule, not a judgement (how shapes are named). Halts are in the halt table below.
The day in numbers
- Previous close
- $8.61
- Open, 9:30 a.m.
- $8.69
- Gap at the open
- +0.9%
- Pre-market high
- $8.69 at 7:00 a.m.
- High, 4 a.m. to 4 p.m.
- $11.98 at 3:36 p.m.
- Low, 4 a.m. to 4 p.m.
- $8.46
- Close, 4 p.m.
- $11.85
- Change at 4 p.m.
- +37.6%
- After-hours high, 4 p.m. to 8 p.m.
- $11.86 at 4:05 p.m.
- Volume, 4 a.m. to 4 p.m.
- 205,193
- Volume after hours, 4 p.m. to 8 p.m.
- 7,935
- Relative volume by 8 p.m.
- 10.6×
- Float
- 1.77 million shares, from filings as of September 14, 2026
- Shares outstanding
- 1.80 million
- Volume, from the one-minute bars: 2,911 shares before the 9:30 a.m. open (1%), 38,684 in the first 30 minutes (18%), and 171,533 in the rest of the day to 8 p.m. (80%).
- Other days GTBP met the small-cap rule in our recaps: 2, the latest on September 15, 2026.
- The next session, September 15, 2026, it was down 22.0% from its previous close at the 4:00 p.m. close.
On the day's lists: the gainers, intraday runners. It is here because it met the small-cap rule on the gainers: price $2 to $20, up 10% or more, relative volume 5× or more, float under 20 million shares, its high reached $1 or more and it started the day at $20 or under (the rule every page uses).
Halts (none)
The exchange's halt feed shows no halts for GTBP that day.
Halt bands that day: the LULD plan's Amendment 18 rules (what that means, LULD calculator).
How we read the data, name a day's shape and pick the stocks: methodology.
Trade this day
Replay GTBP on September 14, 2026 in Hindsight Markets: the real tape, the order book and the halts, on a clock you control, and see where your orders would have filled.