Hindsight Markets Recaps Small-cap stocks on September 21, 2026
OPTX, September 21: a Schedule 13D/A and a gap that held
OPTX opened up 18% after a Schedule 13D/A and held near that level into the close.
News via Stock News API
What happened
Before the open
The news came first: a Schedule 13D/A at 7:45 a.m. Before the bell it reached $8.08, on 106K shares.
The open
It opened up 18%, at $8.01.
The close
It closed at $7.89, 8% under its high.
What to take from it: The gap was the move. After the open it went sideways.
The details
How it traded, step by step
Gap and hold. It gapped up 18.0% to $8.01 at the open and held near or above it, trading at $7.89 at 4:00 p.m.
| Time (ET) | What happened |
|---|---|
| 7:37 a.m. | News (GlobeNewsWire): Syntec Optics (NASDAQ: OPTX) Secures Landmark Order for U.S. Space Force and Reconnaissance |
| 7:43 a.m. | SEC filing 4: 4 |
| 7:45 a.m. | SEC filing SCHEDULE 13D/A: |
| 9:28 a.m. | Pre-market high, $8.08 |
| 9:30 a.m. | First trade 20% above the previous close of $6.79 |
| 9:30 a.m. | The open: $8.01, up 18.0% from the previous close |
| 9:49 a.m. | High of the day to the close, $8.55 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $7.89, 7.7% 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
- $6.79
- Open, 9:30 a.m.
- $8.01
- Gap at the open
- +18.0%
- Pre-market high
- $8.08 at 9:28 a.m.
- High, 4 a.m. to 4 p.m.
- $8.55 at 9:49 a.m.
- Low, 4 a.m. to 4 p.m.
- $6.81
- Close, 4 p.m.
- $7.89
- Change at 4 p.m.
- +16.2%
- After-hours high, 4 p.m. to 8 p.m.
- $8.05 at 4:17 p.m.
- Volume, 4 a.m. to 4 p.m.
- 518,548
- Volume after hours, 4 p.m. to 8 p.m.
- 51,240
- Relative volume by 8 p.m.
- 4.7×
- Float
- 10.36 million shares, from filings as of September 21, 2026
- Shares outstanding
- 40.28 million
- From news to the move: the first trade 20% above the previous close came 1 hour 44 minutes after the latest SEC filing before it (SCHEDULE 13D/A, 7:45 a.m.).
- Volume, from the one-minute bars: 105,806 shares before the 9:30 a.m. open (19%), 187,138 in the first 30 minutes (33%), and 276,844 in the rest of the day to 8 p.m. (49%).
- In our recaps, this is the only day OPTX met the small-cap rule.
On the day's lists: the pre-market gappers, gainers. It is here because it met the small-cap rule on the pre-market gappers: 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 OPTX 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 OPTX 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.