Hindsight Markets Recaps Small-cap stocks on August 19, 2026
ZNB, August 19: a 7:00 filing, one halt, and $5.03
ZNB opened up 19%, ran to $3.20 through one halt, then fell below its open by the close.
What happened
Draft for review. Not published.
Pre-market spike
With a float of just 261K shares, ZNB ran from $2.27 at 4:02 a.m.
Stop It's 4:20. ZNB is at $4.01, up from the $2.23 previous close, and over 2 million shares have already traded in a stock with a 261,000-share float. Would you buy here?
Press play: the real Level 2, tape and chart run from 4:17 a.m. and stop at 4:20 a.m. ET for your call.
It hit $5.03, the high of the day, the next minute. Within three minutes it was back at $3.87.
The $4.20 bid
By 5:23 a 28K-share bid sat at $4.20.
Stop It's 5:24. ZNB is at $4.25. About 28,000 shares are bid at $4.20, just below. The high so far is $5.03. Would you buy here?
Press play: the real Level 2, tape and chart run from 5:21 a.m. and stop at 5:24 a.m. ET for your call.
Sellers hit it at 5:24:11. In 5 seconds, 23K shares traded there and the bid was gone.
After a 7:00 a.m. 6-K filing, it slid to $2.58 by 8:07.
Afternoon halt
An afternoon run topped at $3.20 at 2:49 p.m. At 2:55:27 a volatility pause froze it at $2.16.
Stop It's 3:00. ZNB was halted at 2:55 with a last trade of $2.16, after falling from $3.20 in six minutes. The halt is about to end. Would you buy the reopen?
Press play: the real Level 2, tape and chart run from 2:57 p.m. and stop at 3:00 p.m. ET for your call.
It reopened 5% higher at $2.26, then hit the day's low, $1.78, at 3:07. It closed at $2.23, exactly the prior close.
What to take from it: Every push after the $5.03 top stopped lower, and the gap was gone by the close.
Replay ZNB's day
It starts at 2:27 p.m. ET with the real Level 2, time and sales and chart, from the same feed the replay plays, stops at 2:30 p.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 19.3% to $2.66 at the open, ran from the open to the high of $3.20 in 319 minutes, then gave back 180% of that move by 4:00 p.m., trading at $2.23, below the open.
| Time (ET) | What happened | Watch it |
|---|---|---|
| 4:07 a.m. | First trade 20% above the previous close of $2.23 | |
| 4:09 a.m. | Volume since 4:00 a.m. passes the whole float, 261,441 shares | |
| 4:21 a.m. | Pre-market high, $5.03 | |
| 4:21 a.m. | High of the day to the close, $5.03 | |
| 9:30 a.m. | The open: $2.66, up 19.3% from the previous close | |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $2.23, 55.7% 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
- $2.23
- Open, 9:30 a.m.
- $2.66
- Gap at the open
- +19.3%
- Pre-market high
- $5.03 at 4:21 a.m.
- High, 4 a.m. to 4 p.m.
- $5.03 at 4:21 a.m.
- Low, 4 a.m. to 4 p.m.
- $1.78
- Close, 4 p.m.
- $2.23
- Change at 4 p.m.
- +0.0%
- After-hours high, 4 p.m. to 8 p.m.
- $2.41 at 6:31 p.m.
- Volume, 4 a.m. to 4 p.m.
- 18.08 million
- Volume after hours, 4 p.m. to 8 p.m.
- 120,364
- Relative volume by 8 p.m.
- 105.6×
- Float
- 261,441 shares, from filings as of August 19, 2026
- Shares outstanding
- 262,082
- Volume, from the one-minute bars: 15.66 million shares before the 9:30 a.m. open (86%), 404,760 in the first 30 minutes (2%), and 2.13 million in the rest of the day to 8 p.m. (12%).
- Float rotation, the volume since 4 a.m. against the float of 261,441 shares: past it once at 4:09 a.m., twice at 4:10 a.m., three times at 4:13 a.m.
- Other days ZNB met the small-cap rule in our recaps: 2, the latest on November 3, 2026.
On the day's lists: the pre-market gappers, 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 |
|---|---|---|---|---|---|---|---|
| 2:55 p.m. | 3:00 p.m. | 5 min 0 s | down 23.4% | $2.26, up 4.6% | down 2.2% | 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 ZNB on August 19, 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.