🇰🇷 KOREA OPEN BRIEF · MAY 13, 2026 (WED) · 07:30 KST
Korea Open May 13 Trading the CPI Aftershock
Semis gap down -1~3% · Battery names gap up on TSLA +3.9% · Per-stock entry plan
SEMIS GAP DOWNBATTERY GAP UPENERGY · DEFENSE10Y 4.46%WTI $103
📌 Korea open brief · Published 07:30 KST, May 13, 2026
90 minutes before the 09:00 KOSPI open. Built from the US 5/12 close + overnight ADR/futures flow.
Not a recommendation; gap estimates are conditional on overnight data.
📌 These figures are a snapshot fixed at publication on 2026-05-13. Not a live quote. See live price →
POSITIONING: Last night's US CPI +3.8% shock and 10Y to 4.46% 1-yr high drove S&P -0.67%, Nasdaq -1.11%.
Especially the May parabolic winners — INTC -10%, AMD -5%, QCOM -12% — got hit hard by profit-taking.
In contrast, NVDA +2%, MU +6.5%, TSLA +3.9% decoupled to the upside — KR open on 5/13 is firmly a sector-divergence day.
Semis gap-down is unavoidable, but HBM names (SKH, Samsung) get partial buffer from NVDA/MU strength.
Batteries (LG Energy Solution, Samsung SDI) gap up on TSLA.
KOSPI entered 5/13 from a ~7,800 record-high zone — the day pits profit-taking momentum vs decoupling-name demand.
▸ Overnight US Close & Futures
S&P FUT OVN
7,340
-0.31%
FURTHER WEAK
NASDAQ FUT
25,860
-0.47%
TECH HEAVY
USDKRW
1,358
+0.7%
USD STRONG
10Y US
4.46%
+11BP
1Y HIGH
WTI OIL
$103.2
+5.1%
IRAN RISK
VIX
19.8
+9.3%
VOL UP
▸ Overnight US Drivers → KR Impact Matrix
NVDA$219.44
+2.0%
GPU dominator decoupled higher during the chip sell-off. → HBM momentum intact → buffers SKH / Samsung gap-down
MUMicron
+6.5%
Only memory name to hold strength. → HBM decoupling signal — direct positive for SKH and Samsung memory franchise
INTC$116.50
-10.0%
Down 10% after a 5-day +35% run. → Negative read-across for Samsung Foundry (direct competitor), KR equipment names (HMI, DB HiTek)
AMD$436.14
-5.4%
Profit-taking after a +34% week. → MI350 HBM3E SKH supply momentum intact, short-term sentiment hit
TSLA$444.94
+3.9%
Autonomy day + Robotaxi expansion. → LG Energy Solution, Samsung SDI, LG Chem battery group gap up
QCOMQualcomm
-12.0%
Worst day since 2020. → Mobile SoC group weak — short-term pressure on Samsung System LSI
XOM$103 oil
+5.2%
WTI past $103, energy + defense rally. → SK Innovation, S-Oil gap up; Hanwha Aerospace, LIG Nex1 defense names gap up
▸ Per-Stock Gap Setup · 09:00 KST Open
005930Samsung Electronics
-1.5 ~ -2.5%
Prev close ₩291,000 est. INTC -10% foundry read-across + US chip sell-off. But HBM3E 12-Hi NVDA qualification + MU +6.5% decoupling provide buffer. Gap-down to ₩285,000 is the first support; ₩282,000 zone becomes short-term buy candidate.
000660SK hynix
-2.0 ~ -3.5%
Prev close ₩1,976,000 est (after +5.11% premarket on 5/12). 1Y +898% cumulative + memory profit-taking pressure. But MU +6.5% / NVDA +2% keep HBM thesis intact. Below ₩1,917,000 starts becoming a short-term buy zone.
373220LG Energy Solution
+1.5 ~ +2.5%
TSLA +3.9% autonomy/Robotaxi momentum strengthens battery-cell demand thesis. Share-gain narrative vs Panasonic/CATL intact. Entries within +1% recommended over chasing the gap.
006400Samsung SDI
+1.0 ~ +2.0%
TSLA strength + ongoing US IRA subsidy = US cell business positive. Sympathy move with LGES. Possible profit-taking after the gap-up.
012450Hanwha Aerospace
+1.5 ~ +3.0%
Iran Hormuz tension + US LMT/RTX +2.5% = global defense bid. K9 howitzer Poland/Egypt export narrative reinforced. Be mindful of profit-taking risk given YTD already strong.
096770SK Innovation
+2.0 ~ +3.5%
WTI $103 + Brent $105 = refining margin expansion. SK On battery business also benefits from TSLA strength. The cleanest double-tailwind name on the KR open today.
▸ Key News · KR Impact
MACRO · FX
USDKRW Breaks 1,358 — Direct Hit From 1-Yr High US Yield
10Y US yield at 4.46% 1Y high → USD strength → KRW weakness. Likely amplifies foreign-investor sell pressure on KRX.
However, the SKH ADR listing pursuit (NYSE-targeted) effect may keep some foreign bid in memory names.
KRW weakness is a tailwind for export-heavy names: LG Energy Solution, Samsung SDI.
MU +6.5% Solo Strength — Potential HBM Memory Differentiation
Among the broad chip sell-off, Micron's lone +6.5% is a clear HBM-decoupling signal.
Direct positive for Korean memory (SKH, Samsung). The 5/13 KR open's central question: can the HBM3E 12-Hi momentum offset broader memory + foundry weakness.
Citi 5/12 note: Samsung target ₩460,000, SKH ₩3,100,000 (+60% / +58% upside).
Source: Seoul Economic Daily · CNBC · Citi (May 12, 2026)
FOREIGN FLOW
Foreign Sellers -₩5.97T YTD May, Retail +₩4.60T, Institutional +₩1.87T
The May KOSPI record-high run was driven by retail and institutional buying — not foreigners.
Foreigners net sold ₩5.97T in May. With 1-yr high US yield + KRW weakness today, foreign selling risk may amplify — but the 7,800+ record-high zone has its own attractiveness.
The 5/13 vortex: can retail FOMO (₩12.8T in 3 days) sustain momentum vs foreign selling triggering profit-taking.
Source: Seoul Economic Daily · KRX (May 12, 2026)
▸ Today's KR Trading Schedule
📅 Key events today (KST)
09:00
KOSPI / KOSDAQ open — first 30 minutes decide gap-fill vs continuation
10:00
China April industrial production — consensus +5.4%. A miss adds to KR semis pressure
11:30
China April retail sales — consensus +4.8%. KR cosmetics / duty-free read
15:30
KOSPI / KOSDAQ close — daily recap to be published at 16:00 KST
US regular session opens — INTC/AMD follow-through decision time
BOTTOM LINE · KR OPEN POSITIONING
US CPI shock + 10Y 1Y high + WTI $103 = the macro triple-shock transmits to KR. The dominant theme today is sector divergence:
semis −, batteries / defense / energy + simultaneously.
Simple playbook:
① Don't chase semis gap-down to the short side — NVDA / MU buffer the HBM thesis.
② Cap battery/defense/oil gap-up chases at +1% — historical pattern shows post-gap consolidation.
③ SK Innovation is the cleanest setup with the double tailwind (oil + battery).
④ KOSPI at 7,800+ record-high zone → if foreign selling intensifies, additional profit-taking is on the table; keep 30%+ in cash.
Tonight at 22:30 KST US open: INTC -10% follow-through / 10Y breaking 4.50% / CSCO earnings will set the tone for 5/14 KR session.