Korea — Kospi −5.9% breaks its 18-month uptrend; SK Hynix…

Korea — Kospi −5.9% breaks its 18-month uptrend; SK Hynix and Samsung about −8% on a China memory scare

Korea is the story this morning. The Kospi is down 5.9% at 6,007 at 05:44 UTC, after falling as far as about 5,914 and briefly below 6,000 — enough to trigger the exchange's sell-side curb on computer-driven trading for the first time in about two months. The two memory makers carry it: SK Hynix and Samsung Electronics traded down around 8%, as reported, after China's CXMT flagged progress on a new memory chip.

The Morning 10

Korea — Kospi −5.9% breaks its 18-month uptrend; SK Hynix and Samsung about −8% on a China memory scare

1 Korea — Kospi −5.9%, under 6,000 at the low; a sell-side curb for the first time in two months
2 Kospi chart — three failed tries at 7,200, then the break of the line from April 2025
3 Memory makers — SK Hynix and Samsung about −8% as China's CXMT flags a new memory chip
4 US memory and optics — Micron −3.9% to below $1,000, SanDisk −6.0%, Lumentum −9.8%
5 AI indices — Rubin −6.9% on the week, Agentic Winners +2.1%: the money moves from chips to software
6 Tokyo and Taiwan — Nikkei −2.0% back from its holiday, Taiex −1.9%; Hong Kong flat, Shanghai +0.3%
7 Wall Street — S&P 500 flat at 7,807, Nasdaq −0.4%; Meta +3.4%, energy fund +1.4%
8 Oil and rates — Brent −0.9% overnight after Monday's high close; the US bond market reopens after Columbus Day
9 Print Record — JPMorgan, Goldman Sachs and UnitedHealth report today; PepsiCo is scored at tonight's close
10 Europe and futures — DAX +0.8% on Monday; S&P 500 futures −0.1%, bitcoin +2.1%

The full Morning 10 →

On the tape

The permanent record of one trading day on Closelooknet — an investment research diary, not advice. Today's live view is the homepage.