Hindsight Markets Recaps Small-cap stocks on September 4, 2026
BIAF, September 4: a quiet open, one halt, and $20.33
BIAF opened down 14% after news, then ran to $20.33 through one halt during the session.
News via Stock News API
What happened
A quiet start
The news, a conference listing, came after the $12.78 close. BIAF opened 14% lower at $11.05 and sat quiet for an hour.
Stop It's 11:04. BIAF is at $13.15 and has held between $12.49 and $13.38 for 20 minutes. More shares than the whole float have already traded. Would you buy here?
Press play: the real Level 2, tape and chart run from 11:01 a.m. and stop at 11:04 a.m. ET for your call.
The halt
It broke out. The 11:04 minute traded 81K shares. At 11:06:40 it was halted at $15.23, reopened at $15.18, and reached $19.35 by 11:57.
The $15.33 bid
A big bid sat far below the price. From 11:51 it showed up to 25K shares at $15.33, about 4% of the float.
Stop It's 12:09. BIAF is at $19.30, up from $18.19 at 12:04 and just under the $19.45 high from 12:07. A big bid has sat far below, at $15.33, since 11:51. Would you buy here?
Press play: the real Level 2, tape and chart run from 12:06 p.m. and stop at 12:09 p.m. ET for your call.
It ran to $20.33, the high of the day. At 12:10:01 the $15.33 bid was pulled without trading, and the 12:11 minute fell to $18.35.
It closed at $15.26 and fell to $10.18 after hours.
What to take from it: A quiet open did not mean a quiet day.
Replay BIAF's day
It starts at 10:59 a.m. ET with the real Level 2, time and sales and chart, from the same feed the replay plays, stops at 11:02 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
Intraday run. It opened down 13.5% at $11.05, then ran from the open to the high of $20.33 in 159 minutes through a halt.
| Time (ET) | What happened | Watch it |
|---|---|---|
| Sep 3, 4:30 p.m. | News (Business Wire): bioAffinity Technologies to Participate in the H.C. Wainwright 28th Annual Global Investment Conference | |
| 4:00 a.m. | Pre-market high, $12.65 | |
| 9:30 a.m. | The open: $11.05, down 13.5% from the previous close | |
| 10:46 a.m. | Volume since 4:00 a.m. passes the whole float, 594,922 shares | |
| 11:12 a.m. | First trade 20% above the previous close of $12.78 | |
| 12:09 p.m. | High of the day to the close, $20.33 | |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $15.26, 24.9% 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
- $12.78
- Open, 9:30 a.m.
- $11.05
- Gap at the open
- −13.5%
- Pre-market high
- $12.65 at 4:00 a.m.
- High, 4 a.m. to 4 p.m.
- $20.33 at 12:09 p.m.
- Low, 4 a.m. to 4 p.m.
- $10.90
- Close, 4 p.m.
- $15.26
- Change at 4 p.m.
- +19.4%
- After-hours high, 4 p.m. to 8 p.m.
- $15.85 at 4:01 p.m.
- Volume, 4 a.m. to 4 p.m.
- 8.69 million
- Volume after hours, 4 p.m. to 8 p.m.
- 725,110
- Relative volume by 8 p.m.
- 3.6×
- Float
- 594,922 shares, from filings as of September 4, 2026
- Shares outstanding
- 600,736
- From news to the move: the first trade 20% above the previous close came 18 hours 42 minutes after the latest news item before it (Business Wire, Sep 3, 4:30 p.m.).
- Volume, from the one-minute bars: 138,761 shares before the 9:30 a.m. open (1%), 186,560 in the first 30 minutes (2%), and 9.09 million in the rest of the day to 8 p.m. (97%).
- Float rotation, the volume since 4 a.m. against the float of 594,922 shares: past it once at 10:46 a.m., twice at 11:12 a.m., three times at 11:18 a.m.
- Other days BIAF met the small-cap rule in our recaps: 7, the latest on October 8, 2026.
On the day's lists: the intraday runners. It is here because it was in play on the intraday runners: up 30% or more on $3 million or more really traded, outside the small-cap rule's price, relative volume or float, 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 |
|---|---|---|---|---|---|---|---|
| 11:06 a.m. | 11:11 a.m. | 5 min 0 s | up 16.3% | $15.18, down 0.3% | up 8.2% | 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 BIAF on September 4, 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.