---
title: "Pre-market hot trades in US stocks: Opendoor Tech pre-market down 8.66%, active trading, sector trends trigger volatility attention"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/267835344.md"
description: "Opendoor Tech Series Z - CW26 pre-market down 8.66%; SMX Security Matters pre-market up 59.54%; HeartBeam pre-market up 42.21%; K Wave Media pre-market up 36.83%"
datetime: "2025-11-28T12:01:39.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/267835344.md)
  - [en](https://longbridge.com/en/news/267835344.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/267835344.md)
---

# Pre-market hot trades in US stocks: Opendoor Tech pre-market down 8.66%, active trading, sector trends trigger volatility attention

**Popular Pre-Market Trades in US Stocks**

Opendoor Tech Series Z - CW26, down 8.66% in pre-market, with no significant news recently. Trading is active, and capital flow is evident. Considering the sector and industry trends, the stock shows significant volatility, and the specific reasons need further observation.

**Top Gainers in Pre-Market US Stocks**

SMX Security Matters, up 59.54% in pre-market, with no significant news recently. Trading is active, and capital flow is evident. Considering the sector and industry trends, the stock shows significant volatility, and the specific reasons need further observation.

HeartBeam is up 42.21% in pre-market. Based on recent key news:

1.  On November 26, HeartBeam updated the regulatory pathway for its 12-lead electrocardiogram synthesis software application. This update followed the FDA's decision, indicating that the company has made progress in product development and market promotion, driving the stock price up.
    
2.  The HeartBeam system is a portable non-invasive recorder designed to record, store, and transmit patients' three-lead electrocardiograms. This device can be used in clinical or home settings, and while it does not perform cardiac analysis, it can be used in conjunction with electrocardiogram viewing software systems for manual interpretation of non-life-threatening arrhythmias by doctors or healthcare professionals. The market potential and application prospects of this product have attracted investor attention, further driving the stock price up.
    
3.  HeartBeam published relevant content through Business Wire and is responsible for the accuracy of the information. This transparency and information disclosure have enhanced market confidence, supporting the stock price increase. The medical device industry has performed strongly recently, with evident capital inflow.
    

K Wave Media, up 36.83% in pre-market, with no significant news recently. Trading is active, and capital flow is evident. Considering the sector and industry trends, the stock shows significant volatility, and the specific reasons need further observation

### Related Stocks

- [OPENZ.US](https://longbridge.com/en/quote/OPENZ.US.md)

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