Hindsight Markets Recaps Small-cap stocks on September 21, 2026
GDC, September 21: a run to $1.95
GDC opened near its previous close, then ran to $1.95 during the session.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $1.38, on 2K shares.
The open
It opened near its previous close, at $1.35. It ran to $1.95 by 2:06 p.m.
The close
It closed at $1.46, 25% under 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 4.7% at $1.35, then ran from the open to the high of $1.95 in 276 minutes.
| Time (ET) | What happened |
|---|---|
| 7:33 a.m. | Pre-market high, $1.38 |
| 9:30 a.m. | The open: $1.35, up 4.7% from the previous close |
| 1:37 p.m. | First trade 20% above the previous close of $1.29 |
| 2:06 p.m. | High of the day to the close, $1.95 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $1.46, 25.1% 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
- $1.29
- Open, 9:30 a.m.
- $1.35
- Gap at the open
- +4.7%
- Pre-market high
- $1.38 at 7:33 a.m.
- High, 4 a.m. to 4 p.m.
- $1.95 at 2:06 p.m.
- Low, 4 a.m. to 4 p.m.
- $1.31
- Close, 4 p.m.
- $1.46
- Change at 4 p.m.
- +13.2%
- After-hours high, 4 p.m. to 8 p.m.
- $2.00 at 7:40 p.m.
- Volume, 4 a.m. to 4 p.m.
- 2.63 million
- Volume after hours, 4 p.m. to 8 p.m.
- 1.15 million
- Relative volume by 8 p.m.
- 12.5×
- Float
- 4.08 million shares, from filings as of September 21, 2026
- Shares outstanding
- 4.16 million
- Volume, from the one-minute bars: 2,450 shares before the 9:30 a.m. open (0%), 3,273 in the first 30 minutes (0%), and 3.77 million in the rest of the day to 8 p.m. (100%).
- Other days GDC met the small-cap rule in our recaps: 3, the latest on September 22, 2026.
On the day's lists: the intraday runners. It is here because it was in play on the intraday runners: up 30% or more on $3 million or more really traded, outside the small-cap rule's price, relative volume or float, 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 GDC 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 GDC on September 21, 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.