Hindsight Markets Small-cap stocks on September 21, 2026
OPTX on September 21, 2026: why it ran
On September 21, 2026, OPTX opened up 18.0% from the previous close of 6.79 and reached 8.55 at 9:49 a.m. ET. The exchange did not halt it.
- Previous close
- 6.79
- Open, 9:30 a.m.
- 8.01
- Gap at the open
- up 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
- After-hours high, 4 p.m. to 8 p.m.
- 8.05 at 4:17 p.m.
- Last trade before 4:00 p.m.
- 7.89
- Volume
- 569,788
- Relative volume
- 4.7x
- Float
- 10.36 million shares, from filings as of September 21, 2026
- Shares outstanding
- 40.28 million
- Halts
- none in the halt feed
Why it ran
News and SEC filings for OPTX published between the previous session's close and the first minute OPTX traded 20% above it, at 9:30 a.m. ET, newest first, from the same feeds the replay shows.
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Syntec Optics (NASDAQ: OPTX) Secures Landmark Order for U.S. Space Force and Reconnaissance
News via Stock News API
How it traded
Gap and fade. It gapped up 18.0% to 8.01 at the open and traded below the open by 4:00 p.m., at 7.89.
| 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 is a fixed rule, not a judgement: gapped 10% or more at the open, ran 10% or more from the open to the high, and faded if it gave back 30% or more of that move by the close.
The day in numbers
- 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.
Halts
The exchange's halt feed shows no halts for OPTX that day.
On this date the LULD plan ran under Amendment 18, in force from February 24, 2020: no band doubling at the open, and the closing doubling only for Tier 1 stocks and Tier 2 stocks whose previous close was at or below three dollars. See LULD halts or work out a band with the LULD calculator.
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.