AI-powered contentSome parts of this article are powered by AI.
Share this article
Summary
Micron Technology (MU) closed down 3.88% and SK Hynix (SKHY) down 4.02% on Monday after China's CXMT announced progress on a denser memory-cell design, per Yahoo Finance and Nasdaq.
The Kospi sank 6.55% to 5,966.15 on Tuesday morning as foreign investors net sold 1.9823 trillion won, according to BloomingBit.
SK Hynix plunged 9.10% and Samsung Electronics dropped 7.09% in Seoul, and the slide triggered the first sell-side trading curb in about two months.
Gotrade News - Micron Technology (MU) and SK Hynix (SKHY) closed down 3.88% and 4.02% respectively on October 12 after Chinese rival CXMT flagged a denser memory design, per Yahoo Finance, and on Tuesday the Kospi sank below 6,000 as foreign investors dumped Samsung Electronics and SK Hynix.
As reported by KED Global, the Korean benchmark dropped more than 6% in late morning trading on October 13 on fresh China chip fears, triggering a sell-side trading curb for the first time in about two months.
Regular-session close on October 12, 2026, New York time. Prices and changes: Yahoo Finance, cross-checked against Nasdaq's official close. Market cap: Nasdaq, as of October 12, 2026.
ChangXin Memory Technologies, or CXMT, announced "significant progress in a new memory-cell design aimed at increasing storage density," according to Yahoo Finance. CXMT president Cao Kanyu said the company aims to "introduce a new server memory product built on the architecture by the end of 2026."
Per BloomingBit, citing Korea Exchange data, the progress in DRAM technology development and the plan to unveil a new server memory product later this year dampened investor sentiment toward Korean semiconductor stocks.
Micron Technology (MU): Shares Drop 3.88% on China Rival's Design Progress
Micron fell as much as 3% during Monday's session, according to Yahoo Finance, and closed down 3.88% at $989.04, about 21% below its 52-week high of $1,255.00.
The decline came despite strong quarterly results the company posted in September, as Yahoo Finance reported. The CXMT news put the focus on competition in server memory, the product category the Chinese company says it is targeting.
SK Hynix (SKHY): 9.10% Slide in Seoul After a 4.02% US Drop
SK Hynix's US-listed shares closed down 4.02% on Monday, while Samsung Electronics tumbled 4% in Seoul, per Yahoo Finance.
The selling deepened in Korea on Tuesday. As of 10:43 a.m. local time, SK Hynix had plunged 9.10% and Samsung Electronics had dropped 7.09%, according to BloomingBit. Foreign selling focused on the two memory-chip heavyweights, as reported by KED Global.
Kospi Falls 6.55% Below 6,000 as Foreign Investors Sell 1.98 Trillion Won
The Kospi stood at 5,966.15 at 10:43 a.m. on October 13, down 392.30 points or 6.55% from the previous session, according to BloomingBit. The tech-heavy Kosdaq was at 809.40, down 39.79 points or 4.69%.
Foreign investors were net sellers in the first hour and a half of trading, while individuals and institutions were net buyers. BloomingBit reported the following investor flows on the Kospi market for that window:
Investor group
Net position, first 1.5 hours (Oct 13)
Foreign investors
Net sold 1.9823 trillion won
Individuals
Net bought 1.4271 trillion won
Institutions
Net bought 518.5 billion won
Foreign investors also sold a net 191.9 billion won of Kospi 200 futures, per BloomingBit. KED Global said the drop below 6,000 triggered the first sell-side trading curb in nearly two months.
This article is for education and information only and is not investment advice. Investment decisions are yours to make after your own research.
Gotrade is the trading name of Gotrade Securities Inc., which is registered with and supervised by the Labuan Financial Services Authority (LFSA). This content is for educational purposes only and does not constitute financial advice. Always do your own research (DYOR) before investing.
M. Alfathan Rahman is a content writer with over 3 years of experience developing digital content strategies across various industries, including fintech. He has experience producing content for tax-related websites and financial education platforms registered with Kominfo (Indonesia's Ministry of Communication and Informatics). His focus areas include data research, and crafting financial articles that are informative, accurate, and accessible to investors of all experience levels.
Hendrie Saputra holds a Master of Business Administration (MBA) with a concentration in Business Risk & Finance, along with professional experience in finance, marketing, and project management. He is experienced in analyzing market data and developing research-driven business strategies.
