Hindsight Markets Small-cap stocks on September 28, 2026
CSAI on September 28, 2026: why it ran
On September 28, 2026, CSAI opened up 9.1% from the previous close of 3.53 and reached 5.12 at 9:58 a.m. ET. The exchange halted it 4 times.
- Previous close
- 3.53
- Open, 9:30 a.m.
- 3.85
- Gap at the open
- up 9.1%
- Pre-market high
- 3.86 at 4:00 a.m.
- High, 4 a.m. to 4 p.m.
- 5.12 at 9:58 a.m.
- Low, 4 a.m. to 4 p.m.
- 2.36
- After-hours high, 4 p.m. to 8 p.m.
- 2.97 at 4:52 p.m.
- Last trade before 4:00 p.m.
- 2.50
- Volume
- 756,182
- Relative volume
- 37.4x
- Float
- 864,504 shares, from filings as of September 28, 2026
- Shares outstanding
- 867,282
Why it ran
News and SEC filings for CSAI published between the previous session's close and the first minute CSAI traded 20% above it, at 9:52 a.m. ET, newest first, from the same feeds the replay shows.
No news found before the move.
How it traded
Intraday run. It opened up 9.1% at 3.85, then ran from the open to the high of 5.12 in 28 minutes through a halt.
| Time (ET) | What happened |
|---|---|
| 4:00 a.m. | Pre-market high, 3.86 |
| 9:30 a.m. | The open: 3.85, up 9.1% from the previous close |
| 9:52 a.m. | First trade 20% above the previous close of 3.53 |
| 9:53 a.m. | Halted: LULD pause (limit up-limit down). Trading resumes at 9:58 a.m. |
| 9:58 a.m. | High of the day to the close, 5.12 |
| 9:59 a.m. | Halted: LULD pause (limit up-limit down). Trading resumes at 10:04 a.m. |
| 10:05 a.m. | Halted: LULD pause (limit up-limit down). Trading resumes at 10:10 a.m. |
| 3:35 p.m. | Halted: LULD pause (limit up-limit down). Trading resumes at 3:40 p.m. |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 2.50, 51.2% 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
- Volume, from the one-minute bars: 5,350 shares before the 9:30 a.m. open (1%), 263,313 in the first 30 minutes (35%), and 487,519 in the rest of the day to 8 p.m. (64%).
- The halt at 9:53 a.m.: up 10.6% in the 5 minutes into it, reopened at 4.65, up 3.3% from the last trade before it, then down 4.7% over the next 5 minutes.
- The halt at 9:59 a.m.: down 1.6% in the 5 minutes into it, reopened at 4.30, down 2.9% from the last trade before it, then down 17.7% over the next 5 minutes.
- The halt at 10:05 a.m.: down 20.1% in the 5 minutes into it, reopened at 3.53, down 0.3% from the last trade before it, then down 7.1% over the next 5 minutes.
- The halt at 3:35 p.m.: down 17.4% in the 5 minutes into it, reopened at 2.45, up 2.9% from the last trade before it, then up 6.1% over the next 5 minutes.
- In our recaps, this is the only day CSAI met the small-cap rule.
Halts
| Halted | Resumed | Length | Reason in the feed |
|---|---|---|---|
| 9:53 a.m. | 9:58 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 9:59 a.m. | 10:04 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 10:05 a.m. | 10:10 a.m. | 5 min 0 s | LULD pause (limit up-limit down) |
| 3:35 p.m. | 3:40 p.m. | 5 min 0 s | LULD pause (limit up-limit down) |
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 CSAI on September 28, 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.