Hindsight Markets Recaps Small-cap stocks on October 21, 2026
SDEV, October 21: a run to $1.65
SDEV opened up 13%, ran to $1.65, then gave back most of the run by the close.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $0.925, on 401K shares.
The open
It opened up 13%, at $0.94. It ran to $1.65 by 11:39 a.m.
The close
It closed at $1.09, 34% under its high.
What to take from it: The high came early. Most of the run was gone by the close, so the move was in the morning, not the hold.
The details
How it traded, step by step
Gap, run, gave some back. It gapped up 13.3% to $0.94 at the open, ran from the open to the high of $1.65 in 129 minutes, then gave back 79% of that move by 4:00 p.m., trading at $1.09, still above the open.
| Time (ET) | What happened |
|---|---|
| 7:40 a.m. | Pre-market high, $0.925 |
| 9:30 a.m. | The open: $0.94, up 13.3% from the previous close |
| 9:44 a.m. | First trade 20% above the previous close of $0.83 |
| 11:39 a.m. | High of the day to the close, $1.65 |
| 11:54 a.m. | Volume since 4:00 a.m. passes the whole float, 29.08 million shares |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $1.09, 33.9% 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
- $0.83
- Open, 9:30 a.m.
- $0.94
- Gap at the open
- +13.3%
- Pre-market high
- $0.925 at 7:40 a.m.
- High, 4 a.m. to 4 p.m.
- $1.65 at 11:39 a.m.
- Low, 4 a.m. to 4 p.m.
- $0.8774
- Close, 4 p.m.
- $1.09
- Change at 4 p.m.
- +31.3%
- After-hours high, 4 p.m. to 8 p.m.
- $1.30 at 4:04 p.m.
- Volume, 4 a.m. to 4 p.m.
- 41.05 million
- Volume after hours, 4 p.m. to 8 p.m.
- 3.69 million
- Relative volume by 8 p.m.
- 2.5×
- Float
- 29.08 million shares, from filings as of October 21, 2026
- Shares outstanding
- 51.75 million
- Volume, from the one-minute bars: 400,871 shares before the 9:30 a.m. open (1%), 2.26 million in the first 30 minutes (5%), and 42.07 million in the rest of the day to 8 p.m. (94%).
- Float rotation, the volume since 4 a.m. against the float of 29.08 million shares: past it once at 11:54 a.m.
- Other days SDEV met the small-cap rule in our recaps: 11, the latest on October 27, 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 SDEV 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 SDEV on October 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.