Hindsight Markets Recaps Small-cap stocks on September 18, 2026
MGN, September 18: a run to $5.60
MGN opened near its previous close, then ran to $4.21 during the session.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $5.60, on 2M shares.
The open
It opened near its previous close, at $3.69. It ran to $4.21 by 1:24 p.m.
The close
It closed at $3.84, 31% 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 down 0.8% at $3.69, then ran from the open to the high of $4.21 in 234 minutes.
| Time (ET) | What happened |
|---|---|
| 8:14 a.m. | First trade 20% above the previous close of $3.72 |
| 8:24 a.m. | Pre-market high, $5.60 |
| 8:24 a.m. | High of the day to the close, $5.60 |
| 8:25 a.m. | Volume since 4:00 a.m. passes the whole float, 871,833 shares |
| 9:30 a.m. | The open: $3.69, down 0.8% from the previous close |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $3.84, 31.4% 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
- $3.72
- Open, 9:30 a.m.
- $3.69
- Gap at the open
- −0.8%
- Pre-market high
- $5.60 at 8:24 a.m.
- High, 4 a.m. to 4 p.m.
- $5.60 at 8:24 a.m.
- Low, 4 a.m. to 4 p.m.
- $3.54
- Close, 4 p.m.
- $3.84
- Change at 4 p.m.
- +3.2%
- After-hours high, 4 p.m. to 8 p.m.
- $4.10 at 4:25 p.m.
- Volume, 4 a.m. to 4 p.m.
- 2.46 million
- Volume after hours, 4 p.m. to 8 p.m.
- 20,089
- Relative volume by 8 p.m.
- 3.7×
- Float
- 871,833 shares, from filings as of September 18, 2026
- Shares outstanding
- 1.23 million
- Volume, from the one-minute bars: 2.03 million shares before the 9:30 a.m. open (82%), 148,124 in the first 30 minutes (6%), and 304,542 in the rest of the day to 8 p.m. (12%).
- Float rotation, the volume since 4 a.m. against the float of 871,833 shares: past it once at 8:25 a.m., twice at 8:39 a.m.
- Other days MGN met the small-cap rule in our recaps: 2, the latest on October 28, 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 MGN 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 MGN on September 18, 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.