Hindsight Markets Small-cap stocks on September 1, 2026
AMBR on September 1, 2026: why it ran
On September 1, 2026, AMBR opened up 20.7% from the previous close of 1.16 and reached 1.60 at 4:45 a.m. ET. The exchange did not halt it.
- Previous close
- 1.16
- Open, 9:30 a.m.
- 1.40
- Gap at the open
- up 20.7%
- Pre-market high
- 1.60 at 4:45 a.m.
- High, 4 a.m. to 4 p.m.
- 1.60 at 4:45 a.m.
- Low, 4 a.m. to 4 p.m.
- 0.8603
- After-hours high, 4 p.m. to 8 p.m.
- 1.14 at 7:28 p.m.
- Last trade before 4:00 p.m.
- 0.8800
- Volume
- 8.67 million
- Relative volume
- 377.6x
- Float
- 152.67 million shares, from filings as of September 1, 2026
- Shares outstanding
- 188.11 million
- Halts
- none in the halt feed
Why it ran
News and SEC filings for AMBR published between the previous session's close and the first minute AMBR traded 20% above it, at 4:08 a.m. ET, newest first, from the same feeds the replay shows.
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Amber Premium Transforms into AMBR, Dedicated to Building Specialized AI Agents for Finance, Enterprise, and Growth
News via Stock News API
How it traded
Gap and fade. It gapped up 20.7% to 1.40 at the open and traded below the open by 4:00 p.m., at 0.8800.
| Time (ET) | What happened |
|---|---|
| 3:30 a.m. | News (PRNewsWire): Amber Premium Transforms into AMBR, Dedicated to Building Specialized AI Agents for Finance, Enterprise, and Growth |
| 4:08 a.m. | First trade 20% above the previous close of 1.16 |
| 4:45 a.m. | Pre-market high, 1.60 |
| 4:45 a.m. | High of the day to the close, 1.60 |
| 9:30 a.m. | The open: 1.40, up 20.7% from the previous close |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, 0.8800, 45.0% 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 38 minutes after the latest news item before it (PRNewsWire, 3:30 a.m.).
- Volume, from the one-minute bars: 7.12 million shares before the 9:30 a.m. open (82%), 534,287 in the first 30 minutes (6%), and 1.02 million in the rest of the day to 8 p.m. (12%).
Halts
The exchange's halt feed shows no halts for AMBR 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 AMBR on September 1, 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.