Hindsight Markets Small-cap stocks on September 11, 2026
GTBP on September 11, 2026: why it ran
On September 11, 2026, GTBP opened up 6.6% from the previous close of 6.18 and reached 8.80 at 3:33 p.m. ET. The exchange did not halt it.
- Previous close
- 6.18
- Open, 9:30 a.m.
- 6.59
- Gap at the open
- up 6.6%
- Pre-market high
- 6.68 at 8:53 a.m.
- High, 4 a.m. to 4 p.m.
- 8.80 at 3:33 p.m.
- Low, 4 a.m. to 4 p.m.
- 6.12
- After-hours high, 4 p.m. to 8 p.m.
- 8.70 at 5:01 p.m.
- Last trade before 4:00 p.m.
- 8.60
- Volume
- 201,962
- Relative volume
- 19.7x
- Float
- 1.77 million shares, from filings as of September 11, 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 10:14 a.m. ET, newest first, from the same feeds the replay shows.
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GT Biopharma to Host Live Company Presentation on the Development of TriKE® Platform for Cancer Treatment, September 11, 2026
News via Stock News API
How it traded
Intraday run. It opened up 6.6% at 6.59, then ran from the open to the high of 8.80 in 363 minutes.
| Time (ET) | What happened |
|---|---|
| 8:00 a.m. | News (GlobeNewsWire): GT Biopharma to Host Live Company Presentation on the Development of TriKE® Platform for Cancer Treatment, September 11, 2026 |
| 8:53 a.m. | Pre-market high, 6.68 |
| 9:30 a.m. | The open: 6.59, up 6.6% from the previous close |
| 10:14 a.m. | First trade 20% above the previous close of 6.18 |
| 3:33 p.m. | High of the day to the close, 8.80 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 8.60, 2.3% 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
- From news to the move: the first trade 20% above the previous close came 2 hours 14 minutes after the latest news item before it (GlobeNewsWire, 8:00 a.m.).
- Volume, from the one-minute bars: 1,636 shares before the 9:30 a.m. open (1%), 12,732 in the first 30 minutes (6%), and 187,594 in the rest of the day to 8 p.m. (93%).
- Other days GTBP met the small-cap rule in our recaps: 2, the latest on September 15, 2026.
- The next session, September 14, 2026, it was up 37.6% 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 11, 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.