Trump Scraps Iran Strike, Oil Crashes -4.6%, SOX Explodes +7.91% — Chip Gap-Up Setup
Hey, Dongchun here.
KOSPI and KOSDAQ open on June 12, 2026 after US markets closed with Nasdaq +2.54% and S&P 500 +1.75%. Here is the Korean stock market preview for foreign investors.
The only thing that matters today is that geopolitical fear lifted and chips exploded. Trump scrapping the Iran strike crushed oil -4.62%, and on top of that the SOX surged +7.91% with Intel +10.3% on a BofA upgrade and Micron +11%, snapping risk appetite back in a single session. This matters because the two weights that crushed Korea recently — an oil-driven inflation scare and foreign chip selling — both just reversed.
Watch one signal: whether the US SOX +7.91% transmits into Samsung and SK Hynix and pulls foreign buyers back to memory.
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1. US Market Close: Impact on Korean Stocks
US equities rallied broadly on June 11, with the S&P 500 up +1.75% to 7,394.30, the Nasdaq +2.54% to 25,809.66, the Dow +1.86% to 50,848.75, and the small-cap Russell 2000 leading at +3.02% to 2,921.03. The Russell outperforming the megacaps signals breadth — the move was a market-wide risk-on, not a narrow handful of names.
The single biggest catalyst was geopolitical relief. President Trump cancelled threatened strikes on Iran after earlier vowing very hard attacks, which collapsed the Middle East supply premium and sent WTI crude down -4.62%. That removed the inflation scare that had driven the prior session's selloff.
Semiconductors were the engine. The SOX exploded +7.91% as Micron jumped about 11%, AMD about 8%, Lam Research +12.7%, and Intel +10.3% after a BofA upgrade citing surging CPU orders. Falling 10-year yields (down to 4.46%) and a softer dollar added fuel, while the VIX collapsed -12.51% to 19.44, back below the calm threshold.
Adobe beat with non-GAAP EPS of $5.96 and record revenue of $6.62B, topping estimates, yet shares slipped after hours — a reminder that good prints alone do not lift AI-software multiples.
| Index | Close | Change |
|---|---|---|
| S&P 500 | 7,394.30 | +1.75% |
| Nasdaq | 25,809.66 | +2.54% |
| Dow Jones | 50,848.75 | +1.86% |
| Russell 2000 | 2,921.03 | +3.02% |
2. KOSPI and KOSDAQ Today: Korean Market Opening Outlook
Korea's most recent close was heavy. The KOSPI fell -4.52% to 7,730.82 and the KOSDAQ slipped -1.67% to 951.63, weighed down by quarterly futures-and-options expiry and profit-taking after a prior melt-up. The drop was mechanical rather than structural, with key support now near 7,700.
The notable feature was memory resilience. SK Hynix rose +2.59% against the falling index on intact HBM4 demand, while Samsung Electronics fell only -1.16%, a quarter of the index decline. The names that dragged the index were expiry flows and non-chip large caps, not the memory twins.
The setup flips today. The US SOX +7.91% blowout lands on top of that expiry shock, so the leading signal is whether foreigners return to Samsung and SK Hynix at the open. If chip buying resumes, the prior selloff could prove a short give-back.
| Index | Prev Close | Change | Key Level |
|---|---|---|---|
| KOSPI | 7,730.82 | -4.52% | support 7,700 / resistance 7,800 |
| KOSDAQ | 951.63 | -1.67% | support 950 / resistance 1,000 |
| Investor | KOSPI Net | KOSDAQ Net | Trend |
|---|---|---|---|
| Foreigners | Net sell, large-cap | Mixed | Expiry-day profit-taking |
| Institutions | Net sell, program | Mixed | Triple-witching unwind |
| Retail | Mixed | Net buy | Rotating into KOSDAQ |
3. Korean Sector Breakdown: What is Moving Today
The dominant theme was a semiconductor blowout sparked by geopolitical relief and a BofA upgrade of Intel, not by earnings or policy. Falling oil and yields amplified the chip rally across memory, logic, and equipment names.
For Korea, the top read-through sector is semiconductors. Samsung Electronics (005930) and SK Hynix (000660) are directly exposed to the US chip surge, with Micron +11% the clearest memory tailwind; SK Hynix already closed +2.59% in the prior session. Internet was the other relative bright spot, with Kakao (035720) up +3.01%.
The pressured groups were domestic large caps and energy-linked names. Hyundai Motor (005380) fell -0.83% and NAVER (035420) -1.32% in the prior session's expiry unwind, while LG Energy Solution (373220) held at -0.26%. Today's focus is whether the chip read-through lifts these names off the expiry lows.
| Sector | US Session | Korea Stock | Korea Move | Watch |
|---|---|---|---|---|
| Semiconductors | ▲ SOX +7.91% | Samsung (005930), SK Hynix (000660) | +2.59% (Hynix) | KODEX Semiconductor |
| Internet | ▲ Mixed | Kakao (035720) | +3.01% | KODEX Internet |
| Autos | ▼ Soft | Hyundai (005380) | -0.83% | KRX Autos |
| 2차전지 | ▼ Soft | LG Energy (373220) | -0.26% | TIGER 2차전지 |
4. Korean Stocks on My Radar
Risk-on lifted every position; all five closed green. Facts only, no buy/sell advice.
| Ticker | Price | Session % | Key Event |
|---|---|---|---|
| BMNR | $16.52 | +5.63% | Crypto risk-on; ETH treasury tops 5.5M ETH (4.59% of supply) |
| SMCI | $31.97 | +9.22% | $7B financing closed for $39B AI-server backlog; chip-rally lift |
| ASTS | $97.56 | +11.73% | June 17 BlueBird 8/9/10 launch; FCC SCS authorization |
| POET | $11.25 | +2.46% | AI optical-interconnect theme; Lumilens deal, $400M raise |
| RBLX | $43.49 | +4.80% | $3B buyback; Russia ban lifted; class-action overhang |
ASTS led at +11.73% as its June 17 BlueBird 8/9/10 launch from Cape Canaveral drew attention, with FCC Supplemental Coverage from Space authorization and a 98.9 Mbps in-orbit speed cited as competitive proof points.
SMCI rebounded +9.22% after closing its roughly $7B equity and equity-linked financing to fund a $39B AI-server backlog; the stock sat in its $27.81–$30.73 support zone, and Raymond James lifted its target to $45 from $35.
BMNR rose +5.63% on crypto risk-on as its Ethereum treasury surpassed 5.5 million ETH, about 4.59% of circulating supply. RBLX gained +4.80% on a $3B buyback and Russia lifting its ban, though a class-action suit lingers; POET added +2.46% on its AI optical-interconnect roadmap, backed by the Lumilens collaboration and a $400M raise.
5. How to Trade KOSPI Today: Setup and Levels
This is the most actionable section. After a -4.52% expiry-day drop, the KOSPI faces a far friendlier backdrop: Nasdaq futures +3.48%, S&P futures +1.81%, and Dow futures +1.90% overnight, on top of a SOX +7.91% blowout. That combination raises the odds of a gap-up open, with semiconductors as the primary driver.
The single most important indicator to watch is foreigners' net buy or sell in Samsung Electronics (005930) in the first five minutes of the 9:00 AM KST open. Samsung is the largest KOSPI weight and the most liquid foreign vehicle, so its opening flow typically leads index direction; a clear foreign net buy would confirm the US chip rally is transmitting into Korea.
The two sectors to focus on are semiconductors — Samsung Electronics (005930) and SK Hynix (000660), the direct beneficiaries of Micron +11% and the SOX surge — and internet, led by Kakao (035720) after its +3.01% prior close.
| Scenario | Trigger Condition | KOSPI Target |
|---|---|---|
| Bull | Foreign net buy in Samsung > +200B KRW, chip read-through holds | Reclaims 7,800+ |
| Neutral | Gap-up fades as US strength is pre-priced, foreigners flat | 7,700–7,900 range |
| Bear | Oil rebounds or foreign selling persists post-expiry | Tests 7,700 support |
Base case is a gap-up that tries to digest the expiry shock, with follow-through hinging on whether foreigners return to chips. International readers without KRX access can track the move via the EWY (iShares MSCI South Korea ETF) or Samsung Electronics GDRs.
Today was the day fear lifted, not the day a trend broke. On a stage cleared of Iran risk and lit up by a chip blowout, the one line that writes the session is whether foreigners come back to Samsung Electronics.
So — which way does Korea swing at the open today?
That's the AM breakdown for June 12, 2026. Trade safe.
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