This article is for informational purposes only and is not financial advice. TheGatBull may earn a commission from some links at no cost to you — see our disclosure and full disclaimer.
This is not financial advice.
Korea’s week in one line: a sell-side circuit breaker on Tuesday, a buy sidecar on Friday. The market slammed both brakes inside five sessions — and in between, it printed the biggest quarterly tech operating profit in history (Samsung, ₩89.4 trillion) and the biggest foreign-company listing in US history (SK hynix’s $26.5B — ≈₩40T — Nasdaq ADR). “Is AI demand cracking, or did crowded positioning just unwind?” — two very different diagnoses were both on trial this week. Here it is in seven numbers.
The scoreboard — seven numbers
| # | Number | What it is | Why it matters |
|---|---|---|---|
| 1 | ₩89.4T (~$60B) | Samsung Electronics (KRX: 005930) preliminary Q2 operating profit, announced Tuesday | The largest quarterly operating profit ever reported by a tech company — and the market fell 4.91% that same day |
| 2 | -4.91% → 7,656.31 | Tuesday’s KOSPI close (intraday ~-8%; the year’s 6th circuit breaker, only the 12th ever) | A sell-side halt on a record-earnings day — expectations, not fundamentals, broke first |
| 3 | +2.52% → 7,475.94 | Friday’s KOSPI close (spiked more than 5% intraday; the year’s 17th buy sidecar at 12:54 p.m.). The Kosdaq — Korea’s Nasdaq-style tech board — closed +5.47% at 837.43 after its own buy sidecar | The opposite brake, three sessions later |
| 4 | about -7.1% | The week: Monday’s close near 8,051 → Friday’s 7,475.94 | Even after Friday’s surge, the week closed firmly down |
| 5 | $26.5B | SK hynix (KRX: 000660) Nasdaq ADR raise — 177.9M ADSs at $149 | The largest foreign-company listing in US history, surpassing Alibaba’s 2014 debut (~$21.8B) |
| 6 | +12.8% | SKHYV’s first-day close at $168.01 (opened ~$170) | A double-digit pop on a deal priced in the middle of a crash week |
| 7 | ~₩1.7T (~$1.1B) | Institutions’ net buying on the main board by early Friday afternoon (Korea Exchange intraday data) | The hand that bought the rebound — while retail and foreigners sold into it |
₩/$ conversions at USD/KRW 1,500.29 (July 10, 2026 close). Flow figures as reported; see footnote 3.
Four footnotes — the story behind the numbers
1. What this week traded wasn’t direction — it was volatility itself. A sell halt (#2) and a buy sidecar (#3) — a sidecar is Korea’s milder brake: a five-minute pause on program trading, triggered here by a 5% jump in KOSPI 200 futures — in the same week means the market is digesting amplitude, not picking a trend. One of the fastest markets in the world — this is the land of ppalli-ppalli (“hurry-hurry”) — hit the brakes in both directions. Fundamentals don’t reverse twice in five sessions. Positioning does.
2. Interim verdict on the two diagnoses: the unwind case gained evidence, but nobody won. Friday’s catalysts were Micron expanding its US investment plan to roughly $250 billion through 2035 — a US memory peer confirming demand — and the crush of demand around the SKHY listing. Both feed the “demand is alive” column. But #4 stands: the week still closed down about 7%. The first half’s steep slope invited this giveback, and nothing yet says the giveback is finished.
3. The buyers changed by the day. Tuesday’s final tape: foreigners sold a net ₩2.93 trillion (~$2.0B) and retail bought ₩3.13 trillion (~$2.1B) while institutions were modest net sellers (₩391B). Friday flipped it: institutions net-bought about ₩1.7 trillion by early afternoon (#7) and led the bounce while retail and foreigners sold into it. Foreign → retail → institutional is a familiar rotation in a post-crash repair phase — and whether the institutional bid survives next week is the tell worth watching.
4. SKHY’s week is over; the spread’s week begins. Priced into the teeth of a crash, the deal still raised $26.5B (#5) and popped double digits (#6). The when-issued ticker SKHYV — the temporary symbol used until regular settlement begins — hands over to the permanent SKHY early this week. The debut pop priced access. From here, price discovery belongs to the ADR–Seoul (KRX: 000660) spread — the gap between the two prices of the same company — and the HBM cycle (high-bandwidth memory, the stacked chips AI accelerators run on) — we read what the listing filing actually promises in our SKHY prospectus breakdown.
🎩 Under the Gat — In a week that hit both brakes, asking “which direction?” is the wrong first question. Monday I’m watching two things: where the ADR–Seoul spread settles in the first regular sessions, and whether Friday’s institutional bid shows up again. Both answers live in the order book, not the headlines. — a view, not advice.
The one-line takeaway
A record profit, a record listing, and both brakes — all in one week that still closed down 7%. The “demand cracking vs. positioning unwind” trial didn’t reach a verdict, and that unresolved state is the price of this market right now.
Related reading
- Bigger than Alibaba — but read the filing first: SK hynix’s Nasdaq listing, decoded
- Why is the Kospi down today? The July 7 crash in 7 numbers
- EWY’s single-stock concentration risk
Sources
- DigitalToday — KOSPI surges, 17th buy sidecar of the year; intraday flows (July 10, 2026)
- Korea JoongAng Daily — buy-side sidecar as Kospi surges more than 5% (July 10, 2026)
- Korea Times — July 7 close, flows, circuit-breaker count
- Bloomberg — SKHYV first-day close $168.01; $26.5B raise; ticker switch
- CNBC — Micron expands US investment plan (~$250B through 2035)
— Mr. Gat 🐂
This is not financial advice. Closing prices, flow data, and listing figures are as reported by the Korea Exchange and financial media as of July 10–12, 2026, and should be rechecked against primary sources as of your trade date. FX conversions use USD/KRW 1,500.29 (July 10, 2026 close) unless dated otherwise. The author does not recommend buying or selling any security.
Frequently Asked Questions
Why did the KOSPI have both a circuit breaker and a buy sidecar in the same week?
Tuesday’s 8% intraday plunge tripped a 20-minute sell-side circuit breaker; Friday’s 5% surge triggered the year’s 17th buy sidecar. Same week, opposite brakes — a sign the market is digesting volatility and positioning, not a one-directional fundamental shift. Not financial advice.
How did the KOSPI end the week?
Down about 7%: from Monday’s close near 8,051 to Friday’s 7,475.94, even after Friday’s 2.52% rebound. The Kosdaq closed Friday up 5.47% at 837.43.
What drove Friday’s rebound?
Overnight strength in US chip stocks after Micron expanded its US investment plan to about $250 billion through 2035, plus demand around SK hynix’s record $26.5B Nasdaq ADR listing. Institutions were the net buyers by early afternoon; retail and foreign investors sold into the bounce.
Was SK hynix’s Nasdaq debut an IPO?
Not in the usual sense — SK hynix has been listed in Seoul for decades. The $26.5B deal listed American depositary receipts (ADRs) on Nasdaq and raised new capital, surpassing Alibaba’s 2014 debut as the largest foreign-company listing in US history.
This article is for informational purposes only and is not financial advice. TheGatBull may earn a commission from some links at no cost to you — see our disclosure and full disclaimer.