Hindsight Markets Recaps Small-cap stocks on August 28, 2026
RDIB, August 28: a run to $23.96
RDIB opened near its previous close, then ran to $23.96 during the session.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $16.03, on 23K shares.
The open
It opened near its previous close, at $15.13. It ran to $23.96 by 3:08 p.m.
The close
It closed at $18.14, 24% under its high.
What to take from it: The move came during the session, not at the open.
The details
How it traded, step by step
Intraday run. It opened down 1.8% at $15.13, then ran from the open to the high of $23.96 in 338 minutes.
| Time (ET) | What happened |
|---|---|
| 8:32 a.m. | Pre-market high, $16.03 |
| 9:30 a.m. | The open: $15.13, down 1.8% from the previous close |
| 1:42 p.m. | First trade 20% above the previous close of $15.40 |
| 3:08 p.m. | High of the day to the close, $23.96 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $18.14, 24.3% 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
- $15.40
- Open, 9:30 a.m.
- $15.13
- Gap at the open
- −1.8%
- Pre-market high
- $16.03 at 8:32 a.m.
- High, 4 a.m. to 4 p.m.
- $23.96 at 3:08 p.m.
- Low, 4 a.m. to 4 p.m.
- $14.51
- Close, 4 p.m.
- $18.14
- Change at 4 p.m.
- +17.8%
- After-hours high, 4 p.m. to 8 p.m.
- $18.68 at 4:02 p.m.
- Volume, 4 a.m. to 4 p.m.
- 254,384
- Volume after hours, 4 p.m. to 8 p.m.
- 12,451
- Relative volume by 8 p.m.
- 1.1×
- Float
- 521,602 shares, from filings as of August 28, 2026
- Shares outstanding
- 22.89 million
- Volume, from the one-minute bars: 22,849 shares before the 9:30 a.m. open (9%), 551 in the first 30 minutes (0%), and 243,435 in the rest of the day to 8 p.m. (91%).
- Other days RDIB met the small-cap rule in our recaps: 1, the latest on August 26, 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 (none)
The exchange's halt feed shows no halts for RDIB that day.
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 RDIB on August 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.