Hindsight Markets Small-cap stocks on September 22, 2026
GDC on September 22, 2026: why it ran
On September 22, 2026, GDC opened up 25.3% from the previous close of 1.46 and reached 2.13 at 9:44 a.m. ET. The exchange did not halt it.
- Previous close
- 1.46
- Open, 9:30 a.m.
- 1.83
- Gap at the open
- up 25.3%
- Pre-market high
- 2.08 at 6:21 a.m.
- High, 4 a.m. to 4 p.m.
- 2.13 at 9:44 a.m.
- Low, 4 a.m. to 4 p.m.
- 1.48
- After-hours high, 4 p.m. to 8 p.m.
- 1.72 at 7:07 p.m.
- Last trade before 4:00 p.m.
- 1.60
- Volume
- 7.59 million
- Relative volume
- 24.5x
- Float
- 4.08 million shares, from filings as of September 22, 2026
- Shares outstanding
- 4.16 million
- Halts
- none in the halt feed
Why it ran
News and SEC filings for GDC published between the previous session's close and the first minute GDC traded 20% above it, at 4:00 a.m. ET, newest first, from the same feeds the replay shows.
No news found before the move.
How it traded
Gap, run and fade. It gapped up 25.3% to 1.83 at the open, ran from the open to the high of 2.13 in 14 minutes, then gave back 177% of that move by 4:00 p.m., trading at 1.60.
| Time (ET) | What happened |
|---|---|
| 4:00 a.m. | First trade 20% above the previous close of 1.46 |
| 6:21 a.m. | Pre-market high, 2.08 |
| 9:30 a.m. | The open: 1.83, up 25.3% from the previous close |
| 9:40 a.m. | Volume since 4:00 a.m. passes the whole float, 4.08 million shares |
| 9:44 a.m. | High of the day to the close, 2.13 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 1.60, 24.9% 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: 3.65 million shares before the 9:30 a.m. open (48%), 1.25 million in the first 30 minutes (16%), and 2.68 million in the rest of the day to 8 p.m. (35%).
- Float rotation, the volume since 4 a.m. against the float of 4.08 million shares: past it once at 9:40 a.m.
- Other days GDC met the small-cap rule in our recaps: 3, the latest on September 21, 2026.
Halts
The exchange's halt feed shows no halts for GDC 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 GDC on September 22, 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.