---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/topics/100000000973296.md"
description: "South Korea's KOSPI just plunged 8.5% and trading was haltedA first-level circuit breaker froze the market for 20 minutes from just after 9 a.m. Seoul time after the index fell 459 points to 4,925New orders stopped. Only cancellations went throughWall Street's AI rout overnight lit the fuse. Nasdaq -5.5% and S&P -4.4% as blue wave fears hit data center buildoutsSamsung Electronics -10% and SK Hynix -11.7% led the drop. Memory and chips are the core of the KOSPIUS traders see it in $EWY. When Asia's open needs a circuit breaker to catch a Wall Street session, the AI selloff is no longer a one-market storySource: StockMarket.News"
datetime: "2026-11-06T01:58:48.000Z"
locales:
  - [en](https://longbridge.com/en/topics/100000000973296.md)
  - [zh-CN](https://longbridge.com/zh-CN/topics/100000000973296.md)
  - [zh-HK](https://longbridge.com/zh-HK/topics/100000000973296.md)
author: "[StockMarket.News](https://longbridge.com/en/profiles/21806507.md)"
generator: "portal-rs"
---

# South Korea's KOSPI just plunged 8.5% and trading …


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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**