Hindsight Markets Recaps Small-cap stocks on September 9, 2026
YMAT, September 9: a run to $3.28
YMAT opened up 42%, ran to $2.30, and held most of the move into the close.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $3.28, on 12M shares.
The open
It opened up 42%, at $1.89. It ran to $2.30 by 3:59 p.m.
The close
It closed at $2.27, 31% under its high.
What to take from it: A gap that holds above its open can keep going: this one held most of its move to the close.
The details
How it traded, step by step
Gap and go. It gapped up 42.3% to $1.89 at the open, ran from the open to the high of $2.30 in 389 minutes, and held most of the move into the close: it gave back 7% of it by 4:00 p.m.
| Time (ET) | What happened |
|---|---|
| 4:00 a.m. | First trade 20% above the previous close of $1.32 |
| 4:01 a.m. | Pre-market high, $3.28 |
| 4:01 a.m. | High of the day to the close, $3.28 |
| 4:19 a.m. | Volume since 4:00 a.m. passes the whole float, 2.71 million shares |
| 9:30 a.m. | The open: $1.89, up 42.3% from the previous close |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $2.27, 30.8% 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
- $1.32
- Open, 9:30 a.m.
- $1.89
- Gap at the open
- +42.3%
- Pre-market high
- $3.28 at 4:01 a.m.
- High, 4 a.m. to 4 p.m.
- $3.28 at 4:01 a.m.
- Low, 4 a.m. to 4 p.m.
- $1.45
- Close, 4 p.m.
- $2.27
- Change at 4 p.m.
- +71.3%
- After-hours high, 4 p.m. to 8 p.m.
- $2.38 at 5:02 p.m.
- Volume, 4 a.m. to 4 p.m.
- 18.37 million
- Volume after hours, 4 p.m. to 8 p.m.
- 921,632
- Relative volume by 8 p.m.
- 1646.4×
- Float
- 2.71 million shares, from filings as of September 9, 2026
- Shares outstanding
- 4.01 million
- Volume, from the one-minute bars: 11.57 million shares before the 9:30 a.m. open (60%), 1.18 million in the first 30 minutes (6%), and 6.54 million in the rest of the day to 8 p.m. (34%).
- Float rotation, the volume since 4 a.m. against the float of 2.71 million shares: past it once at 4:19 a.m., twice at 5:07 a.m., three times at 6:41 a.m.
- Other days YMAT met the small-cap rule in our recaps: 9, the latest on October 26, 2026.
On the day's lists: the gainers, intraday runners. It is here because it met the small-cap rule on the gainers: price $2 to $20, up 10% or more, relative volume 5× or more, float under 20 million shares, 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 YMAT 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 YMAT on September 9, 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.