Hindsight Markets Small-cap stocks on August 31, 2026
GPRK on August 31, 2026: why it ran
On August 31, 2026, GPRK opened up 4.4% from the previous close of 9.83 and reached 11.21 at 1:05 p.m. ET. The exchange did not halt it.
- Previous close
- 9.83
- Open, 9:30 a.m.
- 10.26
- Gap at the open
- up 4.4%
- Pre-market high
- 10.42 at 8:09 a.m.
- High, 4 a.m. to 4 p.m.
- 11.21 at 1:05 p.m.
- Low, 4 a.m. to 4 p.m.
- 10.00
- After-hours high, 4 p.m. to 8 p.m.
- 11.18 at 4:48 p.m.
- Last trade before 4:00 p.m.
- 11.00
- Volume
- 1.13 million
- Relative volume
- 6.4x
- Float
- 17.39 million shares, from filings as of August 31, 2026
- Shares outstanding
- 51.75 million
- Halts
- none in the halt feed
Why it ran
News and SEC filings for GPRK published between the previous session's close and the open, newest first, from the same feeds the replay shows.
No news found before the move.
How it traded
| Time (ET) | What happened |
|---|---|
| 8:09 a.m. | Pre-market high, 10.42 |
| 9:30 a.m. | The open: 10.26, up 4.4% from the previous close |
| 1:05 p.m. | High of the day to the close, 11.21 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 11.00, 1.8% 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: 19,514 shares before the 9:30 a.m. open (2%), 219,951 in the first 30 minutes (19%), and 892,045 in the rest of the day to 8 p.m. (79%).
Halts
The exchange's halt feed shows no halts for GPRK that day.
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 GPRK on August 31, 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.