Hindsight Markets Small-cap stocks on August 13, 2026
GRDX on August 13, 2026: why it ran
On August 13, 2026, GRDX opened up 0.0% from the previous close of 3.29 and reached 4.10 at 12:45 p.m. ET. The exchange did not halt it.
- Previous close
- 3.29
- Open, 9:30 a.m.
- 3.29
- Gap at the open
- up 0.0%
- Pre-market high
- 3.29 at 9:09 a.m.
- High, 4 a.m. to 4 p.m.
- 4.10 at 12:45 p.m.
- Low, 4 a.m. to 4 p.m.
- 3.26
- After-hours high, 4 p.m. to 8 p.m.
- 3.91 at 4:34 p.m.
- Last trade before 4:00 p.m.
- 3.72
- Volume
- 256,932
- Relative volume
- 6.1x
- Float
- 6.92 million shares, from filings as of August 13, 2026
- Shares outstanding
- 7.08 million
- Halts
- none in the halt feed
Why it ran
News and SEC filings for GRDX published between the previous session's close and the first minute GRDX traded 20% above it, at 12:45 p.m. ET, newest first, from the same feeds the replay shows.
No news found before the move.
How it traded
Intraday run. It opened up 0.0% at 3.29, then ran from the open to the high of 4.10 in 195 minutes.
| Time (ET) | What happened |
|---|---|
| 9:09 a.m. | Pre-market high, 3.29 |
| 9:30 a.m. | The open: 3.29, up 0.0% from the previous close |
| 12:45 p.m. | First trade 20% above the previous close of 3.29 |
| 12:45 p.m. | High of the day to the close, 4.10 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 3.72, 9.3% 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: 4 shares before the 9:30 a.m. open (0%), 8 in the first 30 minutes (0%), and 256,920 in the rest of the day to 8 p.m. (100%).
Halts
The exchange's halt feed shows no halts for GRDX 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 GRDX on August 13, 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.