Hindsight Markets Recaps Small-cap stocks on September 18, 2026
CPOP, September 18: a 4:28 a.m. spike to $5.98, one halt, and $4.18
CPOP opened up 27%, ran to $5.43 through one halt, then fell below its open by the close.
What happened
Draft for review. Not published.
A 4 a.m. spike
The day's top came before dawn. At 4:28 a.m. CPOP hit $5.98, the high of the day, up 61% from the $3.71 close. The next minute it fell to $4.23. By the end of the 4:34 minute, more shares had traded than the whole 628K float.
The push after the open
It opened at $4.72 and climbed to $5.35 by 9:43.
Stop It's 10:07. CPOP is at $5.34, up from $4.93 three minutes ago. The pre-market high is $5.98. Would you buy here?
Press play: the real Level 2, tape and chart run from 10:04 a.m. and stop at 10:07 a.m. ET for your call.
One buy order swept it to $5.43, the high since the open. By 10:11 it was back at $4.78.
The slide from $5.43
From there it kept sliding, to $4.29 at 10:26.
Stop It's 10:28. CPOP is at $4.23, down from $5.43 at 10:07. It opened at $4.72. Would you buy this dip?
Press play: the real Level 2, tape and chart run from 10:25 a.m. and stop at 10:28 a.m. ET for your call.
At 10:28:27 a volatility pause froze it at $4.00. It reopened at 10:38:27 at $3.99.
The reopen was not the bottom. It hit $3.38 at 10:44 and closed at $4.18.
What to take from it: On CPOP, the halt reopen was not a floor: it fell another 61 cents after it.
Replay CPOP's day
It starts at 8:21 a.m. ET with the real Level 2, time and sales and chart, from the same feed the replay plays, stops at 8:24 a.m. and asks what you would do. Or press Play on any moment in How it traded.
The details
How it traded, step by step
Gap, run and fade. It gapped up 27.1% to $4.72 at the open, ran from the open to the high of $5.43 in 37 minutes, then gave back 176% of that move by 4:00 p.m., trading at $4.18, below the open.
| Time (ET) | What happened | Watch it |
|---|---|---|
| 4:00 a.m. | First trade 20% above the previous close of $3.71 | |
| 4:28 a.m. | Pre-market high, $5.98 | |
| 4:28 a.m. | High of the day to the close, $5.98 | |
| 4:34 a.m. | Volume since 4:00 a.m. passes the whole float, 628,324 shares | |
| 9:30 a.m. | The open: $4.72, up 27.1% from the previous close | |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $4.18, 30.1% 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
- $3.71
- Open, 9:30 a.m.
- $4.72
- Gap at the open
- +27.1%
- Pre-market high
- $5.98 at 4:28 a.m.
- High, 4 a.m. to 4 p.m.
- $5.98 at 4:28 a.m.
- Low, 4 a.m. to 4 p.m.
- $3.38
- Close, 4 p.m.
- $4.18
- Change at 4 p.m.
- +12.5%
- After-hours high, 4 p.m. to 8 p.m.
- $4.35 at 7:41 p.m.
- Volume, 4 a.m. to 4 p.m.
- 3.94 million
- Volume after hours, 4 p.m. to 8 p.m.
- 51,523
- Relative volume by 8 p.m.
- 50.5×
- Float
- 628,324 shares, from filings as of September 18, 2026
- Shares outstanding
- 937,977
- Volume, from the one-minute bars: 2.89 million shares before the 9:30 a.m. open (72%), 403,261 in the first 30 minutes (10%), and 699,511 in the rest of the day to 8 p.m. (18%).
- Float rotation, the volume since 4 a.m. against the float of 628,324 shares: past it once at 4:34 a.m., twice at 4:45 a.m., three times at 5:47 a.m.
- Other days CPOP met the small-cap rule in our recaps: 1, the latest on September 17, 2026.
On the day's lists: the pre-market gappers, gainers, intraday runners. 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 (1)
| Halted | Resumed | Length | The 5 minutes into it | Reopened at, against the last trade | The 5 minutes after | Reason in the feed | Watch it |
|---|---|---|---|---|---|---|---|
| 10:28 a.m. | 10:38 a.m. | 10 min 0 s | down 12.1% | $3.99, down 0.2% | down 13.0% | LULD pause (limit up-limit down) |
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 CPOP 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.