Hindsight Markets Small-cap stocks on September 18, 2026
CPOP on September 18, 2026: why it ran
On September 18, 2026, CPOP opened up 27.1% from the previous close of 3.71 and reached 5.98 at 4:28 a.m. ET. The exchange halted it once.
- Previous close
- 3.71
- Open, 9:30 a.m.
- 4.72
- Gap at the open
- up 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
- After-hours high, 4 p.m. to 8 p.m.
- 4.35 at 7:41 p.m.
- Last trade before 4:00 p.m.
- 4.18
- Volume
- 4.00 million
- Relative volume
- 50.5x
- Float
- 628,324 shares, from filings as of September 18, 2026
- Shares outstanding
- 937,977
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 day, step by step
- Small cap
- Momentum
- Main move: pre-market
- Gap, run and fade
- Lower high
- Halted once
- Float traded 6x
The day before
On September 17, CPOP traded between $3.05 and $4.93 and closed at $3.71. Its last trade of that evening was $4.84, well above the close.
Pre-market: the float traded by 4:34 a.m.
The first trades on the 18th were at $4.35, already above the $3.71 close. Until 4:27 it drifted between about $4.22 and $4.80 on thin volume.
At 4:27 a.m. it started to move, from $4.57. In the next minute it ran to $5.98, the high so far, at 4:28 a.m., up 61% from the previous close. That one minute traded 128,682 shares. The next minute it dropped to $4.23.
It tried again. At 4:34 a.m. it pushed to $5.58, a lower high under the $5.98 top. By 4:43 it was at $4.71 and still falling.
By the end of the 4:34 minute, more shares had traded than exist in the whole float (628,324). That was seven minutes after the first spike began.
There was a third push at 8:37 a.m. It reached $5.15 at 8:39. At 8:39:14 one buy order swept 13,208 shares from $4.96 to $5.00 across 5 levels. The next minute it touched $5.18, then dropped to $4.66. A smaller try at 8:47 reached $5.04. 2.89 million shares traded before the bell.
The open and the push after 9:30
It opened at $4.72, up 27% from the previous close. The first minutes went nowhere. At 9:34 it started up, and it reached $5.35 at 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, time and sales and chart stop at 10:07 a.m. ET for your call, then show what happened. The clip starts at 10:04 a.m. ET.
At 10:07:01 one buy order swept 10,538 shares from $5.36 to $5.43 across 6 levels. $5.43 was the high since the open. By the end of that minute it was back at $5.11. At 10:11 it dropped to $4.78.
The slide from $5.43
From 10:11 on it slid. $4.57 at 10:22. $4.29 at 10:26. Then it fell through $4.20.
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, time and sales and chart stop at 10:28 a.m. ET for your call, then show what happened. The clip starts at 10:25 a.m. ET.
At 10:28:27 it was halted (a volatility pause) with the last trade at $4.00. It reopened ten minutes later, at 10:38:27. The first print was 11,173 shares at $3.99.
The reopen was not the bottom. At 10:41 it fell to $3.70, and at 10:44 it hit $3.38, the low of the day. That is 43% under the $5.98 high.
The rest of the day
It bounced at 11:00 and traded above $4 for a minute or two. Then it settled into a thin range, mostly between $3.70 and $4.25 for the rest of the session. Many minutes had no trades at all.
It closed at $4.18, 30% under the $5.98 high. That high came before the bell, at 4:28 a.m., 27% above where it opened.
Pre-market and the regular session together traded 3.94 million shares, about 6 times the float. The regular session was 1.05 million of that. The whole day ran at about 51 times normal volume.
What to take from it
- After the top, the next push stopped lower. $5.98 at 4:28 a.m., then $5.58 at 4:34 a.m.
- A halt reopen is not a floor. CPOP reopened at $3.99 and still fell another 61 cents. A buy right at the reopen also paid more than the screen showed.
- The float traded over early in pre-market. By the end of the 4:34 a.m. minute, more shares had traded than the float holds, and the biggest spike of the day was already done.
Why it ran
News and SEC filings for CPOP published between the previous session's close and the first minute CPOP traded 20% above it, at 4:00 a.m. ET, newest first, from the same feeds the replay shows.
No news found before the move.
How it traded
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.
| 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 | |
| 10:28 a.m. | Halted: LULD pause (limit up-limit down). Trading resumes at 10:38 a.m. | |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 4.18, 30.1% 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: 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.
- The halt at 10:28 a.m.: down 12.1% in the 5 minutes into it, reopened at 3.99, down 0.2% from the last trade before it, then down 13.0% over the next 5 minutes.
- Other days CPOP met the small-cap rule in our recaps: 1, the latest on September 17, 2026.
Halts
| Halted | Resumed | Length | Reason in the feed |
|---|---|---|---|
| 10:28 a.m. | 10:38 a.m. | 10 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 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.