Hindsight Markets / Small-cap stocks on September 10, 2026

HCAI on September 10, 2026: why it ran

Published October 9, 2026 · By Hindsight Markets

On September 10, 2026, HCAI opened up 1.9% from the previous close of 4.18 and reached 5.03 at 4:00 a.m. ET. The exchange halted it 7 times.

Previous close

4.18

Open, 9:30 a.m.

4.26

Gap at the open

up 1.9%

Pre-market high

5.03 at 4:00 a.m.

High, 4 a.m. to 4 p.m.

5.03 at 4:00 a.m.

Low, 4 a.m. to 4 p.m.

2.25

After-hours high, 4 p.m. to 8 p.m.

2.79 at 4:00 p.m.

Last trade before 4:00 p.m.

2.45

Volume

478,106

Relative volume

6.7x

Float

7.53 million shares, from filings as of September 10, 2026

Shares outstanding

8.16 million

Halts

7

Why it ran

News and SEC filings for HCAI published between the previous session's close and the first minute HCAI traded 20% above it, at 4:00 a.m. ET, newest first, from the same feeds the replay shows.

1. September 9, 2026, 4:05 p.m. ET · GlobeNewsWire

   Huachen AI Parking Management Technology Holding Co., Ltd. Announces Strategic Cooperation with Beyinda Limited to Expand Precision Metal Components Market in China

News via Stock News API

How it traded

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 9, 4:05 p.m.).
• Volume, from the one-minute bars: 170,299 shares before the 9:30 a.m. open (36%), 67,931 in the first 30 minutes (14%), and 239,876 in the rest of the day to 8 p.m. (50%).
• The halt at 9:40 a.m.: down 11.8% in the 5 minutes into it, reopened at 3.11, down 5.5% from the last trade before it, then down 8.4% over the next 5 minutes.
• The halt at 9:53 a.m.: down 13.4% in the 5 minutes into it, reopened at 2.80, down 1.8% from the last trade before it, then up 3.9% over the next 5 minutes.
• The halt at 10:01 a.m.: up 2.1% in the 5 minutes into it, reopened at 3.20, up 10.0% from the last trade before it, then up 8.7% over the next 5 minutes.
• The halt at 10:13 a.m.: up 19.6% in the 5 minutes into it, reopened at 3.48, unchanged from the last trade before it, then down 6.3% over the next 5 minutes.
• The halt at 10:21 a.m.: down 6.3% in the 5 minutes into it, reopened at 3.06, down 6.1% from the last trade before it, then up 0.7% over the next 5 minutes.
• The halt at 3:42 p.m.: down 7.9% in the 5 minutes into it, reopened at 2.25, down 8.5% from the last trade before it.
• The halt at 3:47 p.m.: down 0.4% in the 5 minutes into it, reopened at 2.68, up 9.4% from the last trade before it, then down 6.7% over the next 5 minutes.
• Other days HCAI met the small-cap rule in our recaps: 1, the latest on September 9, 2026.

Halts

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.