Hindsight Markets Recaps Small-cap stocks on September 24, 2026
YMAT, September 24: an EFFECT notice and $2.11
YMAT opened up 13% after an EFFECT notice, ran to $2.11, then gave back most of the run by the close.
What happened
Before the open
The news came first: an EFFECT notice at 12:15 a.m. Before the bell it reached $2.07, on 9.9M shares.
The open
It opened up 13%, at $1.45. It ran to $2.11 by 10:48 a.m.
The close
It closed at $1.41, 33% 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 $1.45 at the open, ran from the open to the high of $2.11 in 78 minutes, then gave back 106% of that move by 4:00 p.m., trading at $1.41, still above the open.
| Time (ET) | What happened |
|---|---|
| 12:15 a.m. | SEC filing EFFECT: |
| 7:11 a.m. | First trade 20% above the previous close of $1.28 |
| 7:18 a.m. | Volume since 4:00 a.m. passes the whole float, 2.70 million shares |
| 7:20 a.m. | Pre-market high, $2.07 |
| 9:30 a.m. | The open: $1.45, up 13.3% from the previous close |
| 10:48 a.m. | High of the day to the close, $2.11 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $1.41, 33.2% 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
- $1.28
- Open, 9:30 a.m.
- $1.45
- Gap at the open
- +13.3%
- Pre-market high
- $2.07 at 7:20 a.m.
- High, 4 a.m. to 4 p.m.
- $2.11 at 10:48 a.m.
- Low, 4 a.m. to 4 p.m.
- $1.20
- Close, 4 p.m.
- $1.41
- Change at 4 p.m.
- +10.2%
- After-hours high, 4 p.m. to 8 p.m.
- $1.57 at 7:59 p.m.
- Volume, 4 a.m. to 4 p.m.
- 15.77 million
- Volume after hours, 4 p.m. to 8 p.m.
- 96,766
- Relative volume by 8 p.m.
- 14.1×
- Float
- 2.70 million shares, from filings as of September 24, 2026
- Shares outstanding
- 4.01 million
- From news to the move: the first trade 20% above the previous close came 6 hours 55 minutes after the latest SEC filing before it (EFFECT, 12:15 a.m.).
- Volume, from the one-minute bars: 9.95 million shares before the 9:30 a.m. open (63%), 1.43 million in the first 30 minutes (9%), and 4.49 million in the rest of the day to 8 p.m. (28%).
- Float rotation, the volume since 4 a.m. against the float of 2.70 million shares: past it once at 7:18 a.m., twice at 7:23 a.m., three times at 7:32 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 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 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 24, 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.