Foreigners Dump 6.95T Won for 19th Day, KOSPI -1.84% Yet KOSDAQ +2.31%

Hey, Dongchun here.

KOSPI closed -1.84% and KOSDAQ +2.31% on June 04, 2026. Here is what moved the Korean stock market today and what foreign investors should watch for tomorrow.

DONGCHUN'S TAKE

The single most important fact today is that KOSPI fell -1.84% while KOSDAQ rose +2.31% in the same session. Why it matters: foreigners dumped 6.95 trillion won of large-caps for a 19th straight day, gutting Samsung and SK Hynix, while institutions and foreigners rotated into KOSDAQ growth names on stimulus hopes. Watch whether the won breaking 1,534 and a looming US payrolls report pull foreigners into a 20th day of selling at tomorrow's open.

Previous post: Read it →

1. KOSPI and KOSDAQ Close: Korean Stock Market Today

KOSPI closed -1.84% at 8,639.41 on June 4, sliding back to the 8,600 zone just four sessions after intraday breaking 8,900 for the first time. KOSDAQ moved the opposite way, gaining +2.31% to 1,049.73 for its first up day in six sessions. Within one market, large-caps and small-caps decoupled completely.

The single biggest driver was relentless foreign selling. Concerns over collapsed US-Iran peace talks and an overnight Wall Street drop pushed foreigners to net sell over 1 trillion won on KOSPI within the first ten minutes of trading. The selloff persisted all session.

Breadth was split rather than uniform. The KOSPI loss was narrow and large-cap driven — Samsung and SK Hynix alone accounted for more than half of it. VIX rose +1.68% to 16.33, still in the calm sub-20 zone but ticking up.

IndexCloseChangeVolume
KOSPI8,639.41-1.84%Heavy foreign selling
KOSDAQ1,049.73+2.31%Foreign/institution buying

2. Foreign Investor Flow in Korean Stocks

Foreigners net sold 6.95 trillion won on KOSPI, extending an unusual selling streak to a 19th consecutive session since May 7. The selling concentrated in the largest caps — Samsung Electronics and SK Hynix — signaling foreign conviction remains firmly risk-off on Korean blue chips.

Retail investors absorbed the supply again, net buying 5.01 trillion won, while institutions bought 1.81 trillion won; program trades were net sellers at 3.81 trillion won. On KOSDAQ the pattern flipped — foreigners and institutions were net buyers while retail sold, a rotation into growth names on stimulus expectations.

The combined pattern leaves tomorrow hostage to whether foreigners hit a 20th day of large-cap selling. US overnight futures and USD/KRW at 1,534.48 are the leading indicators to watch tonight.

InvestorKOSPI NetKOSDAQ NetTrend
Foreigners-6,953 B KRWNet buying19-day selling streak
Institutions+1,814 B KRWNet buyingDip absorber
Retail+5,012 B KRWNet sellingKOSPI defender

3. Korean Sector Breakdown: Today's Movers

The dominant theme was a large-cap KOSPI selloff led by semiconductors, decoupled from a KOSDAQ growth rally driven by government stimulus hopes. The Financial Services Commission's emergency meeting on KOSDAQ revitalization rotated foreign and institutional money into small-cap growth names.

The laggards were KOSPI blue chips. Samsung Electronics (005930) -2.50% and SK Hynix (000660) -2.63% drove more than half the index drop, with Hyundai Motor (005380) -3.98%, LG Energy Solution (373220) -4.63%, NAVER (035420) -4.63%, and Samsung Life (032830) -11.67% all sharply lower.

The gainers were KOSDAQ biotech and growth. Jusung Engineering surged +9.95%, EcoPro +6.11%, Samchundang Pharm +5.96%, Kolon TissueGene +4.81%, EcoPro BM +3.54%, and Alteogen +2.10%. Watch whether the policy bid sustains the KOSDAQ tomorrow.

SectorDirectionKey StockChangeReason
Semiconductors▼ WeakSamsung (005930)-2.50%Foreign large-cap dumping
Autos▼ WeakHyundai (005380)-3.98%Risk-off, FX
2차전지▼ WeakLG Energy (373220)-4.63%Cyclical pressure
Bio/Growth▲ StrongJusung Eng+9.95%KOSDAQ stimulus hopes
Bio/Growth▲ StrongEcoPro+6.11%Policy-driven rotation

4. Korean Stocks on My Radar

TickerPriceSession %Key Event
BMNR$16.90-5.95%ETH-treasury play pulls back with crypto despite 5.42M ETH / $11.6B holdings
SMCI$47.42-5.48%High-beta AI-server name falls with tech selloff; Mizuho target $44 caps it
ASTS$107.73-8.83%Deutsche Bank cut to Hold, target $106; mid-June BlueBird 8/9/10 Falcon 9 launch ahead
POET$15.38+11.29%AI optical-interconnect momentum on Lumilens order, up ~70% in a week
RBLX$43.68-2.93%Full-year bookings guidance cut on age-verification drag still weighs

POET +11.29% was the standout again, as the AI optical-interconnect and photonics theme kept the high-beta small-cap running on a $50M Lumilens order that could scale to $500M over five years. ASTS -8.83% fell hardest after the Deutsche Bank downgrade lingered, though its mid-June BlueBird 8/9/10 launch on a Falcon 9 keeps the 45-satellite year-end network plan on track.

SMCI -5.48% and BMNR -5.95% slid with the broad tech and crypto selloff. RBLX -2.93% remained pressured by its earlier full-year bookings guidance cut tied to age-verification headwinds.

5. KOSPI Tomorrow: Korean Market Outlook for Next Session

US overnight futures are mixed — Nasdaq -0.38%, S&P 500 -0.21%, Dow +0.22% — a step up from the prior session's steep drop but not a turn higher. That implies a roughly flat-to-soft semiconductor gap for tomorrow's KOSPI open, with foreign direction the real swing factor.

No major chip or big-tech earnings drop tonight; Samsara (IOT) and DocuSign report after the close but carry limited Korea linkage. The cleanest read-through tomorrow runs through whether foreign large-cap selling in Samsung Electronics (005930) and SK Hynix (000660) hits a 20th straight day.

The bigger macro overhang is Friday's US May jobs report. Tonight brings weekly jobless claims (forecast 211K) plus Fed speakers Daly and Barkin, while VIX at 16.33 signals risk appetite is cautious but not panicked.

ScenarioTrigger ConditionKOSPI Target
BullNasdaq futures rebound, foreign selling cools, USD/KRW holds 1,530Retests 8,700
NeutralMixed futures absorbed, foreign selling persists but KOSDAQ strength balances8,550–8,700 range
BearPre-payrolls caution, USD/KRW breaks 1,540, 20th day of foreign sellingTests below 8,500

Base case: KOSPI trades the 8,550–8,700 lane, with the Samsung foreign-flow signal and the USD/KRW level as the two binary inputs ahead of Friday's US payrolls. International readers without KRX access can track Korea exposure via EWY (iShares MSCI Korea ETF) or the Samsung Electronics GDR.

DONGCHUN'S WRAP

Large-caps collapsed while KOSDAQ growth names surged in the same tape. Read where the policy expectation pushed the money, not the headline index drop.

So — where does this leave us going into tomorrow?

That's the PM breakdown for June 04, 2026. Trade safe.

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