Hindsight Markets Small-cap stocks on September 14, 2026
GTBP on September 14, 2026: why it ran
On September 14, 2026, GTBP opened up 0.9% from the previous close of 8.61 and reached 11.98 at 3:36 p.m. ET. The exchange did not halt it.
- Previous close
- 8.61
- Open, 9:30 a.m.
- 8.69
- Gap at the open
- up 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
- After-hours high, 4 p.m. to 8 p.m.
- 11.86 at 4:05 p.m.
- Last trade before 4:00 p.m.
- 11.85
- Volume
- 213,128
- Relative volume
- 10.6x
- Float
- 1.77 million shares, from filings as of September 14, 2026
- Shares outstanding
- 1.80 million
- Halts
- none in the halt feed
Why it ran
News and SEC filings for GTBP published between the previous session's close and the first minute GTBP traded 20% above it, at 1:20 p.m. ET, newest first, from the same feeds the replay shows.
No news found before the move.
How it traded
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 is a fixed rule, not a judgement: gapped 10% or more at the open, ran 10% or more from the open to the high, and faded if it gave back 30% or more of that move by the close.
The day in numbers
- 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.
Halts
The exchange's halt feed shows no halts for GTBP that day.
On this date the LULD plan ran under Amendment 18, in force from February 24, 2020: no band doubling at the open, and the closing doubling only for Tier 1 stocks and Tier 2 stocks whose previous close was at or below three dollars. See LULD halts or work out a band with the LULD calculator.
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.