Hindsight Markets Small-cap stocks on September 11, 2026
XRTX on September 11, 2026: why it ran
On September 11, 2026, XRTX opened up 7.8% from the previous close of 2.18 and reached 2.78 at 4:01 a.m. ET. The exchange did not halt it.
- Previous close
- 2.18
- Open, 9:30 a.m.
- 2.35
- Gap at the open
- up 7.8%
- Pre-market high
- 2.78 at 4:01 a.m.
- High, 4 a.m. to 4 p.m.
- 2.78 at 4:01 a.m.
- Low, 4 a.m. to 4 p.m.
- 2.14
- After-hours high, 4 p.m. to 8 p.m.
- 2.35 at 4:35 p.m.
- Last trade before 4:00 p.m.
- 2.31
- Volume
- 995,651
- Relative volume
- 21.6x
- Float
- 4.85 million shares, from filings as of September 11, 2026
- Shares outstanding
- 4.90 million
- Halts
- none in the halt feed
Why it ran
News and SEC filings for XRTX published between the previous session's close and the first minute XRTX traded 20% above it, at 4:00 a.m. ET, newest first, from the same feeds the replay shows.
-
XORTX Announces Initiation of Clinical and Commercial Manufacturing of XORLO™
News via Stock News API
How it traded
| Time (ET) | What happened |
|---|---|
| Sep 10, 4:05 p.m. | News (GlobeNewsWire): XORTX Announces Initiation of Clinical and Commercial Manufacturing of XORLO™ |
| 4:00 a.m. | First trade 20% above the previous close of 2.18 |
| 4:01 a.m. | Pre-market high, 2.78 |
| 4:01 a.m. | High of the day to the close, 2.78 |
| 9:30 a.m. | The open: 2.35, up 7.8% from the previous close |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 2.31, 16.9% 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
- From news to the move: the first trade 20% above the previous close came 11 hours 55 minutes after the latest news item before it (GlobeNewsWire, Sep 10, 4:05 p.m.).
- Volume, from the one-minute bars: 643,214 shares before the 9:30 a.m. open (65%), 95,516 in the first 30 minutes (10%), and 256,921 in the rest of the day to 8 p.m. (26%).
- Other days XRTX met the small-cap rule in our recaps: 5, the latest on October 9, 2026.
Halts
The exchange's halt feed shows no halts for XRTX 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 XRTX on September 11, 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.