Hindsight Markets Recaps Small-cap stocks on September 21, 2026
AVX, September 21: a gap that held
AVX opened up 13% and held near that level into the close.
What happened
Before the open
We found no news or filing before the move. Before the bell it reached $4.70, on 123K shares.
The open
It opened up 13%, at $4.40.
The close
It closed at $4.38, 9% under its high.
What to take from it: The gap was the move. After the open it went sideways.
The details
How it traded, step by step
Gap and hold. It gapped up 13.1% to $4.40 at the open and held near or above it, trading at $4.38 at 4:00 p.m.
| Time (ET) | What happened |
|---|---|
| 9:26 a.m. | First trade 20% above the previous close of $3.89 |
| 9:27 a.m. | Pre-market high, $4.70 |
| 9:30 a.m. | The open: $4.40, up 13.1% from the previous close |
| 11:17 a.m. | High of the day to the close, $4.83 |
| 3:59 p.m. | Last trade before the 4:00 p.m. close, $4.38, 9.4% below the high |
The shape's name comes from a fixed rule, not a judgement (how shapes are named). Halts are in the halt table below.
The day in numbers
- Previous close
- $3.89
- Open, 9:30 a.m.
- $4.40
- Gap at the open
- +13.1%
- Pre-market high
- $4.70 at 9:27 a.m.
- High, 4 a.m. to 4 p.m.
- $4.83 at 11:17 a.m.
- Low, 4 a.m. to 4 p.m.
- $4.25
- Close, 4 p.m.
- $4.38
- Change at 4 p.m.
- +12.5%
- After-hours high, 4 p.m. to 8 p.m.
- $4.65 at 6:40 p.m.
- Volume, 4 a.m. to 4 p.m.
- 881,945
- Volume after hours, 4 p.m. to 8 p.m.
- 20,171
- Relative volume by 8 p.m.
- 14.9×
- Float
- 6.60 million shares, from filings as of September 21, 2026
- Shares outstanding
- 7.40 million
- Volume, from the one-minute bars: 123,403 shares before the 9:30 a.m. open (14%), 278,306 in the first 30 minutes (31%), and 500,407 in the rest of the day to 8 p.m. (55%).
- Other days AVX met the small-cap rule in our recaps: 1, the latest on September 24, 2026.
On the day's lists: the pre-market gappers, gainers. It is here because it met the small-cap rule on the pre-market gappers: price $2 to $20, up 10% or more, relative volume 5× or more, float under 20 million shares, its high reached $1 or more and it started the day at $20 or under (the rule every page uses).
Halts (none)
The exchange's halt feed shows no halts for AVX that day.
Halt bands that day: the LULD plan's Amendment 18 rules (what that means, LULD calculator).
How we read the data, name a day's shape and pick the stocks: methodology.
Trade this day
Replay AVX on September 21, 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.