Hindsight Markets Small-cap stocks on September 17, 2026
RUBI on September 17, 2026: why it ran
On September 17, 2026, RUBI opened down 1.4% from the previous close of 1.47 and reached 2.15 at 9:55 a.m. ET. The exchange halted it once.
- Previous close
- 1.47
- Open, 9:30 a.m.
- 1.45
- Gap at the open
- down 1.4%
- Pre-market high
- 1.55 at 4:46 a.m.
- High, 4 a.m. to 4 p.m.
- 2.15 at 9:55 a.m.
- Low, 4 a.m. to 4 p.m.
- 1.13
- After-hours high, 4 p.m. to 8 p.m.
- 1.45 at 4:00 p.m.
- Last trade before 4:00 p.m.
- 1.44
- Volume
- 1.10 million
- Relative volume
- 38.5x
- Float
- 1.79 million shares, from filings as of September 17, 2026
- Shares outstanding
- 1.79 million
Why it ran
News and SEC filings for RUBI published between the previous session's close and the first minute RUBI traded 20% above it, at 9:55 a.m. ET, newest first, from the same feeds the replay shows.
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Rubico Announces Stock Dividend of 0.50 Common Shares for Each Outstanding Common Share with a Record Date of September 28, 2026
News via Stock News API
How it traded
Intraday run. It opened down 1.4% at 1.45, then ran from the open to the high of 2.15 in 25 minutes through a halt.
| Time (ET) | What happened |
|---|---|
| 4:46 a.m. | Pre-market high, 1.55 |
| 9:30 a.m. | The open: 1.45, down 1.4% from the previous close |
| 9:45 a.m. | News (GlobeNewsWire): Rubico Announces Stock Dividend of 0.50 Common Shares for Each Outstanding Common Share with a Record Date of September 28, 2026 |
| 9:45 a.m. | Halted: LULD pause (limit up-limit down). Trading resumes at 9:55 a.m. |
| 9:55 a.m. | First trade 20% above the previous close of 1.47 |
| 9:55 a.m. | High of the day to the close, 2.15 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 1.44, 33.0% 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 10 minutes after the latest news item before it (GlobeNewsWire, 9:45 a.m.).
- Volume, from the one-minute bars: 1,348 shares before the 9:30 a.m. open (0%), 335,247 in the first 30 minutes (30%), and 768,402 in the rest of the day to 8 p.m. (70%).
- The halt at 9:45 a.m.: up 21.4% in the 5 minutes into it, reopened at 1.98, up 12.5% from the last trade before it, then down 15.2% over the next 5 minutes.
- Other days RUBI met the small-cap rule in our recaps: 2, the latest on October 6, 2026.
Halts
| Halted | Resumed | Length | Reason in the feed |
|---|---|---|---|
| 9:45 a.m. | 9:55 a.m. | 10 min 0 s | LULD pause (limit up-limit down) |
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 RUBI on September 17, 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.