Three Days of Pressure Released All at Once

DAILY MARKET NOTE / 12 OCT 2026

The Chip Selloff
Met a Thinning Bid

KOSPI -3.65% at 6,384.24 · fourth straight loss · opened -0.72% and extended its losses into the close · KOSDAQ -4.83% at 849.19U.S. chip index down a combined -3.78% across two sessions · OpenAI revenue reports reignited questions about returns on AI investment · Samsung Electronics -4.39% · SK hynix -4.52%Foreign investors sold roughly KRW 2tn of KOSPI cash equities, concentrated in Samsung Electronics and SK hynix · concerns that the buyback-supported bid was fadingJust 18.2% of KOSPI stocks advanced · Brent above $100 amid weekend Middle East tensions · semiconductor exports +170.9% year on year, yet stocks fell

Chip exports were surging. Investors were asking when the money spent on AI would turn into earnings.

MARKET PATH / 01

Each Rebound Set a Lower High

Where the market turned — and where selling finally stopped

THE SHORT VERSIONOpened 0.7% lower and was down more than 3% by midmorning · each rebound stalled below the last · the close was near the session low

KOSPI · 09:00~15:30Opened at 6,578.17 → slipped toward 6,417 in the morning → bounced to around 6,500 near 11 a.m. → broke lower after 2 p.m. to 6,368.49 → closed at 6,384.24

OPEN6,578.17-0.72%

LOW6,368.49-3.89%

HIGH6,589.69-0.55%

CLOSE6,384.24-3.65%

THE READ

KOSPI opened at -0.72% and closed at -3.65% as selling intensified after the bell · most of the day's decline occurred during Korean trading hours · U.S. chip weakness alone cannot explain the worsening intraday selloffSelling had twice stopped around the same level, in the morning and near 1 p.m. · that floor gave way after 2 p.m. · each interim rebound had peaked below the previous oneThe bounce from the low was brief, and the index finished back near the bottom of its rangeKOSDAQ pared its early losses before falling further in the afternoon and closing just above its low · weakness spread beyond chips to AI power infrastructure and batteries

OPEN · MORNING

-0.72%A Lower Open, Then Losses Beyond 3%

Opened at 6,578.17 · briefly reached its high of 6,589.69 around 9:25 a.m.Fell toward 6,417 during the morning, reaching -3.15% intraday

AFTERNOON

The Floor Broke After 2 p.m.

Recovered toward 6,500 around 11 a.m., then fell back toward its morning low around 1 p.m.Broke below that level after 2 p.m. and reached 6,368.49 around 2:45 p.m.

Below 6,400 at the Close

Rebounded toward 6,430, then slipped to 6,384.24 · first close below 6,400 since Aug. 11, roughly two months earlierKOSPI trading value: KRW 21.3299tn · 1.14 times the trailing five-session average

The line follows a five-minute KOSPI chart; horizontal positions reflect actual times · confirmed values are the open, high, low and close, plus a reported morning low of 6,417.13 · other levels are approximate · dashed line: previous close of 6,625.93, which even today's high failed to reach.

WHY / 02

A Shock from Abroad, a Selloff Made Worse at Home

What drove today's decline

THE SHORT VERSIONU.S. chip stocks fell on both days while Korea was closed, and Korean semiconductor heavyweights caught up on Oct. 12 · domestic trading flows deepened the losses · weekend Middle East tensions made a rebound harder

The Outside Shock · U.S. Chips Fell While Korea Was Closed

What was reported · On Oct. 8, the Financial Times reported that OpenAI had told investors its was nearing $50bn · roughly $20bn below the previously cited $70bn · the $70bn figure had been constructed by investors for a direct comparison with Anthropic, and the companies account for revenue from cloud partners differentlyThe follow-up · Bloomberg reported on Oct. 9 that OpenAI expected its annualized run rate to exceed $70bn by year-end · the earlier comparison mixed its end-September pace with a year-end forecast and different accounting methods · it did not mean $20bn in actual revenue had vanishedMarket reaction · concerns revived over when money already invested in AI would translate into sales and profits · the : -3.39% · Nvidia -2.94% · Micron -4.79% · SK hynix's -4.35%The Oct. 9 tech rebound favored software and mega-cap names such as Microsoft and Amazon · Philadelphia Semiconductor Index -0.41% · SK hynix ADR -0.86% · semiconductors did not participate in the reboundThe Korean impact · with the KRX shut for Hangul Day on Oct. 9, domestic stocks absorbed both U.S. sessions on Oct. 12 · Samsung Electronics -4.39% · SK hynix -4.52% · fears that AI capital spending could slow appeared to weigh on semiconductor and power-equipment stocks (Snowshagal interpretation)

-3.78%Philadelphia Semiconductor Index · combined Oct. 8–9 change, U.S. sessions

Show the evidence

U.S. session, Oct. 8 · Nasdaq -1.25%(27,193.34) · S&P500 -0.47% · Dow +0.10% · Broadcom -4.35% · AMD -3.90% · the Nasdaq's biggest one-day slide since mid-August

U.S. session, Oct. 9 · Nasdaq +0.64%(27,366.17) · S&P500 +0.59% · Dow +0.83% · Nvidia -0.52% · AMD -2.03% · Intel -2.22% · Sandisk -1.72%

Philadelphia Semiconductor Index · 13,066.15 on Oct. 7 → 12,623.71 on Oct. 8 → 12,572.42 on Oct. 9

Mirae Asset Securities attributed weakness in Korean chip heavyweights to renewed AI 'bubble' concerns stemming from OpenAI (intraday report)

The Domestic Amplifier · Foreign Selling and a Weaker Bid

Kiwoom Securities strategist Han Ji-young argued that 'today's plunge must be explained by domestic factors' · the selloff continued after Samsung Electronics' strong Oct. 8 earnings release, as did foreign net selling, heightening caution ahead of earnings seasonConcern over fading buyback support · Samsung Electronics was reported to have completed KRW 15tn in share repurchases by Oct. 6, while SK hynix was nearing the end of its program · Daishin Securities strategist Lee Kyung-min said the disappearance of those purchases weakened the market's downside supportPossible ETF rebalancing (brokerage interpretation) · Hana Securities analyst Lim Seung-mi cited in semiconductor-focused ETFs and concerns that buybacks by the two chipmakers were nearing completion · ETF-specific sale volumes and timing have not been disclosedThe counter-evidence · Korea Customs Service data showed $26.1bn of exports from Oct. 1–10, with total exports up +102.0% · were factored in: the daily average rose +28.5% · semiconductor exports reached $12.2bn, up +170.9% · slowing recent chip exports therefore cannot readily explain today's market drop · investors were more focused on whether AI capital spending would endure than on current shipments (Snowshagal interpretation)

KRW 15tnSamsung Electronics buybacks · reportedly completed by Oct. 6

Show the evidence

Exports · 5.5 working days versus 3.5 a year earlier · $4.75bn per working day · semiconductors accounted for 46.7% of exports, up 11.9 percentage points YoY · imports $22.3bn · trade surplus $3.8bn

Working-day-adjusted semiconductor export growth was approximately +72%: a simple calculation dividing $12.2bn by 5.5 days versus about $4.5bn by 3.5 days a year earlier (using the overall working-day counts)

Yuanta Securities analyst Lee Jae-won: 'The greatest concern in Korea's stock market right now is foreign investor flows, not semiconductor earnings'

Daishin Securities strategist Lee Kyung-min expected stronger rebound potential if the U.S. September CPI eased rate concerns and TSMC and ASML results reaffirmed the semiconductor cycle

A Difficult Backdrop for a Rebound · Middle East Tensions and Oil Above $100

On Oct. 10 local time, Yemen's Houthi militants attacked Riyadh's international airport in Saudi Arabia, killing at least 12, according to reports · the Houthis threatened further attacks · reports also described strikes on vessels near the Strait of HormuzBrent topped $105 early in Oct. 12 Asian trading · WTI was $91.26 at 4:10 p.m. KST, -0.64% versus its Oct. 9 close · there was no fresh intraday oil-price spike during Korean market hoursYonhap News linked tech weakness to concerns that a widening Middle East conflict could disrupt energy supplies, fuel inflation and complicate the Fed's inflation fight · the U.S. 10-year yield stood at 5.244% on Oct. 9, above 5% · markets were awaiting U.S. September CPI on the evening of Oct. 14 KSTThe precise contribution of these factors to the KOSPI drop cannot be isolated · we treat them as obstacles to a rebound rather than the immediate cause of the selloff

$104.72Brent · Oct. 9 close, before the weekend attack

Show the evidence

President Trump said the U.S. would consider intervening and would respond very quickly (reported on the morning of Oct. 12)

Brent: +0.7% early in Oct. 12 Asian trading, topping $105 (reported 8:52 a.m. KST) · WTI had closed at $91.85 on Oct. 9

MONEY / 03

Ten Days of Foreign Selling — Over KRW 1tn in SK hynix Alone

Who moved today's market

THE SHORT VERSIONForeign investors sold more than KRW 2tn in Korean equities, including over KRW 1tn in SK hynix · retail investors bought into the decline, but purchases by KRX's 'other corporations' category, which can include share buybacks, were far smaller than in late September

Foreign investors · KOSPI cash equities · KRX tally at 3:38 p.m.

−KRW 2.019tn

are included in KRX's foreign-investor aggregate · tenth straight net-selling session since Sep. 23 · slightly more than the −KRW 1.988tn recorded on Oct. 8Institutions −KRW 111bn · sharply lower than −KRW 1.671tn on Oct. 8 · retail investors +KRW 1.467tnThe intraday shift · At 1:32 p.m., reported foreign selling was −KRW 1.317tn and institutions were net buyers of +KRW 93.6bn · after 1:30 p.m., foreign selling accelerated and institutions turned net sellers · the index's second leg down came during this periodForeign sales by stock · SK hynix −KRW 1.0431tn · Samsung Electronics −KRW 533.1bn · electrical and electronics sector −KRW 1.708tn · notable foreign net buys included ISU Petasys, Samsung Electro-Mechanics and Daeduck Electronics +KRW 648.5bn · down from about KRW 1.6tn on Sep. 21–22 and from +KRW 763.1bn on Oct. 8 · these are reported closing figures and must not be added to the above KRX tally · nor do they represent the buybacks of the two chipmakers aloneFutures went the other way · foreign investors shifted into net buying of futures · program trades remained net sellers for a ninth session · the datasets measure different activity and must not be added togetherUSD/KRW stood at 1,335.1 at 3:30 p.m., down KRW 3.4 from 1,338.5 at the same time on Oct. 8, the previous Korean trading day · the won strengthened despite large foreign equity outflows · exporters, including chipmakers, reportedly sold dollars and helped contain upward pressure on the exchange rate · equity flows and the currency did not move in tandem

KOSPI net buyersRetail investors

KOSPI net sellersForeign investors · institutions

Detailed flow breakdown

Three investor groups · foreign −KRW 2.019tn · retail +KRW 1.467tn · institutions −KRW 111bn · KRX 3:38 p.m. tally (KRW 1bn units) · foreign total includes 'other foreign investors' · closing media reports: foreign −KRW 2.0186tn · retail +KRW 1.4674tn · institutions −KRW 110.7bn
Other corporations · Oct. 12 net buying of KRW 648.5bn is from a closing report (which recorded foreign selling of KRW 2.025tn) · Oct. 8 net buying was KRW 763.1bn in a separate closing report · Sep. 21–22 buying of roughly KRW 1.6tn refers to the Sep. 22 Snowshagal edition (precise KRW 100mn units differ across sources)
Net-selling streak check · foreign net buying of KRW 75.6bn was reported for Sep. 22 from the KRX close · every session from Sep. 23 through Oct. 12 — ten trading days — then recorded foreign net selling
Reported intraday tallies · around 11:40 a.m.: foreign −KRW 535.2bn, institutions +KRW 77.4bn, retail +KRW 289.5bn · at 1:32 p.m.: foreign −KRW 1.317tn, institutions +KRW 93.6bn, retail +KRW 732.2bn
Stock and sector flows · closing-media figures in KRW 100mn units · electrical and electronics: institutional −KRW 569bn, retail +KRW 1.624tn · excludes independently collected after-hours-inclusive datasets

Total program trading−KRW 1.0638tn

Arbitrage program trading+KRW 92.7bn

Institutions · KOSPI 200 futures−KRW 705bn

Retail · KOSPI 200 futures−KRW 22bn

Non-arbitrage program trading −KRW 1.1564tn, 3:34 p.m. tally · total program selling of KRW 1.0638tn is rounded from the won-level sum (summing the separately rounded arbitrage and non-arbitrage values gives −KRW 1.0637tn) · futures from the KRX 3:49 p.m. tally (KRW 1bn units) · KOSPI 200 spot at 1,004.92, December futures at 1,008.25, or a 3.33-point futures premium
Five-session total, Oct. 2–12 · KOSPI foreign −KRW 8.500tn · institutions −KRW 2.071tn · retail +KRW 5.950tn · foreign KOSPI 200 futures −KRW 182bn (KRX tallies, KRW 1bn units)
Versus the previous session · retail buying +KRW 2.906tn → +KRW 1.467tn · KOSDAQ foreign +KRW 60bn → −KRW 27bn · KRX 3:38 p.m. tallies (KRW 1bn units)
KOSDAQ · foreign −KRW 27bn · institutions −KRW 223bn · retail +KRW 249bn (KRX 3:38 p.m. tally)
USD/KRW · Yonhap compared Oct. 12 with a separate prior reference of 1,342.8 and reported a KRW 7.7 decline · that benchmark time differs from the same-time KRW 3.4 comparison used above · opened Oct. 12 at 1,342.5 · Infostock Daily reported a KRW 6.9 decline from the prior overnight close
Short selling · regular-session KOSPI short-sale turnover of KRW 1.600tn · SK hynix ranked first at KRW 383.7bn (KRW 288.4bn on Oct. 8) · Samsung Electronics second at KRW 191.6bn (KRW 365.1bn on Oct. 8)

SECTOR / 04

Where the Market Held Up — and Where It Did Not

A map of winners and losers, not one blended ranking

THE SHORT VERSIONFewer than one in five KOSPI stocks rose · AI power-equipment stocks fell even harder than semiconductors, while shipping benefited from higher freight rates

STRONG

HMMStock+4.81%

Transportation & WarehousingKOSPI industry index+2.29%

InsuranceKOSPI industry index+0.42%

WEAK

LG InnotekStock-16.17%

AI Power InfrastructureKRX thematic index-7.49%

KOSDAQ Top 10KOSDAQ index-6.86%

Machinery & EquipmentKOSPI industry index-6.72%

Semiconductor Top 15KRX thematic index-5.11%

Shipping gained on higher freight rates; AI power infrastructure underperformed even semiconductors.Fourteen of the 15 AI power-infrastructure constituents fell · major equipment names including Hyosung Heavy Industries and Doosan Enerbility lost more than the semiconductor heavyweightsEvery constituent of the Semiconductor Top 15 and Secondary Battery Top 10 declined · no single confirmed, sector-wide catalyst was identified for batteries that dayLG Innotek faced a company-specific earnings concern · brokerage forecasts pointed to a substantial third-quarter miss as a stronger won squeezed profitability in its optical-solutions businessShipping stood out · Daishin Securities described record very-large crude carrier freight rates as the start of a shipping 'supercycle' · insurance and food, beverage & tobacco indices edged higher · advancers accounted for 18.2% of KOSPI and 13.1% of KOSDAQ stocks

Industry measures are KOSPI/KOSDAQ industry indices; themes are KRX thematic indices; individual names show closing stock returns · different methodologies make a single cross-category ranking misleading

Sector evidence and underlying figures

AI power equipment · Hyosung Heavy Industries −10.10% · Doosan Enerbility −8.33% · LS ELECTRIC −6.09% · KOSPI machinery & equipment −6.72% (28 of 29 traded constituents declined) · one AI power-infrastructure constituent was unchanged · Daishin Securities also cut its LS ELECTRIC target price to KRW 300,000 that day, a separate stock-specific factor
Semiconductors · K-AI Semiconductor TOP2+ −5.28% · KOSPI electrical and electronics −4.51% (76 of 80 traded names fell)
Batteries, robotics and shipbuilding · Secondary Battery TOP 10 −3.20% · EcoPro BM −10.25% · POSCO Future M −8.34% · Rainbow Robotics −8.86% · Shipbuilding TOP 10 −4.84% (nine of ten names fell) · Hanwha Ocean −6.53%
LG Innotek · Yuanta Securities projected Q3 operating profit at KRW 78.7bn versus the FnGuide consensus of KRW 202.9bn · weaker optical-solutions margins · target price reduced from KRW 1.4mn to KRW 1.2mn
Areas of relative strength · 10 of 26 transportation and warehousing stocks advanced · 7 of 13 insurers rose · KT&G +1.58%
KOSPI 200 −3.79%, slightly worse than KOSPI's −3.65% · all ten KOSDAQ Top 10 constituents declined
Compared with the prior session · Semiconductor Top 15 −0.27% → −5.11% · Secondary Battery TOP 10 +1.30% → −3.20% · AI Power Infrastructure −3.06% → −7.49% · Shipbuilding TOP 10 −3.86% → −4.84% · K-AI Defense TOP5+ −4.31% → −3.72% · Technology Transfer Bio −6.86% → −4.26%
KOSPI industries · transportation & warehousing +2.29% · food, beverage & tobacco +1.08% (14 of 47 traded names advanced) · insurance +0.42% · textiles & apparel −0.74% · distribution −0.80% · pharmaceuticals −0.96% · financials −1.87% · transportation equipment & parts −2.70% · securities −3.29% · telecommunications −3.81% · chemicals −4.17% · electrical and electronics −4.51% · construction −4.54% · machinery & equipment −6.72%
KOSDAQ industries · non-metallic minerals +0.07% was the only gainer · pharmaceuticals −3.95% · machinery & equipment −4.99% · transportation equipment & parts −5.73% · financials −5.96% · electrical and electronics −6.45%
KRX themes · KOSPI 200 Financial High Dividend TOP 10 +0.11% was the only positive theme cited · Gaming TOP 10 −1.47% · Bio TOP 10 −2.27% · Korea Sovereign AI −3.96% · AI Semiconductor −4.34% · K-AI Secondary Battery −4.99%
Ten largest stocks by market capitalization · Samsung Electronics −4.39% (KRW 250,500) · SK hynix −4.52% (KRW 1,605,000) · Samsung Electronics preferred −3.71% · SK Square −6.29% · Samsung Electro-Mechanics −3.82% · LG Energy Solution −0.75% · Hyundai Motor −1.39% · KB Financial 0.00% · Samsung Biologics −1.48% · Samsung Life Insurance −0.56%
Advancers and decliners · KOSPI: 1 limit-up, 166 higher, 32 unchanged, 720 lower, 0 limit-down · KOSDAQ: 5 limit-up, 223 higher, 45 unchanged, 1,465 lower, 1 limit-down
Share of advancers · KOSPI 18.2% (167/919) · KOSDAQ 13.1% (228/1,739) · Oct. 8: 27.7% and 36.0% · numerator includes advancers and limit-up names; denominator includes limit-up, higher, unchanged, lower and limit-down names
KOSDAQ trading value KRW 6.4216tn · 0.79 times the trailing five-session average
Constituent counts reflect names traded that day · KOSPI 200 spot index: 1,004.92 collected at 4:08 p.m. KST (previous session: 1,044.52)
Industry returns are market-cap-weighted index returns, not net cash inflows into sectors · one day's price changes cannot establish a rotation of capital

CHANGE / 05

The Questions from Oct. 8 — Answered Today

Checking the conditions we set last session

THE SHORT VERSIONForeign selling increased slightly; institutional selling eased sharply · only their combined net sales declined · the chip heavyweights failed to rebound

YESTERDAY → TODAY

Only the combined total shrank · foreign net selling: −KRW 1.988tn → −KRW 2.019tn (an increase) · institutional net selling: −KRW 1.671tn → −KRW 111bn (a sharp decrease) · the combined total fell, yet the index decline deepenedStrength in semiconductor equipment did not spread to the two chip heavyweights; instead, equipment shares joined their decline · Jusung Engineering on Oct. 8 +8.08% → today -5.42% · LEENO +3.17% → -11.15%Brent stayed above $100, while the U.S. 10-year yield remained below 5.3% · both are Oct. 9 U.S.-session closes, before the weekend Houthi attack

Combined KOSPI foreign and institutional net sales · did they shrink?

−KRW 3.659tn

→

−KRW 2.130tn

Samsung Electronics and SK hynix · did they rebound?

-2.42%
-2.44%

→

-4.39%
-4.52%

Brent · did it stay above $100?

$104.28

→

$104.72

U.S. 10-year yield · did it exceed 5.3%?

5.231%

→

5.244%

Item 01 uses the KRX 3:38 p.m. tally: foreign −KRW 2.019tn plus institutional −KRW 111bn · items 03 and 04 compare the Oct. 8 and Oct. 9 U.S. closes

NEXT / 06

What to Watch Next

Three tests for tonight and the Oct. 13 session

Can U.S. Semiconductors Break a Two-Day Losing Streak on Oct. 12?

Philadelphia Semiconductor Index · Oct. 8 -3.39% · Oct. 9 -0.41% · Korea's chip heavyweights absorbed both sessions today · the test is whether the index finishes the Oct. 12 U.S. session above or below its prior close

Will Foreign Investors Sell KOSPI Cash Equities for an Eleventh Session?

Today's −KRW 2.019tn marked ten straight selling sessions · Hana Securities identified a return to foreign cash-equity net buying as a condition for a rebound · test the sign of foreign flows in the KRX's 3:38 p.m. Oct. 13 tally

Can the Decline Stop Spreading Across the Market?

KOSPI's share of advancers has been below half for four straight sessions since Oct. 6: 46.3% → 36.5% → 27.7% → 18.2% · our Oct. 13 threshold is a recovery to the Oct. 8 level of 27.7% · a broad-based rebound would mean more stocks rising than falling

Remaining events this week

Oct. 14 · ASML Q3 results (around 2 p.m. KST) · U.S. September CPI at 9:30 p.m. KST · Bank of America and Morgan Stanley earnings
Oct. 15 · TSMC Q3 earnings call at 3 p.m. KST · U.S. September PPI at 9:30 p.m. KST
Oct. 16 · estimated end of SK hynix's buyback program, according to Daishin Securities
Oct. 22 · Bank of Korea monetary policy decision · Oct. 27–28 · U.S. Federal Reserve meeting

Fewer than two in ten stocks rose today. The next tests arrive with U.S. inflation data on Oct. 14 and TSMC's results on Oct. 15.

Sources · Data Conventions

Reference date: Oct. 12, 2026 · index, industry and stock closing prices refer to the KRX regular session, 9:00 a.m.–3:30 p.m. KST
Overseas news and market indicators · only information published before 8 p.m. KST on Oct. 12 is included
Korean investor flows · KRX regular-session 3:38 p.m. tally · excludes subsequent after-hours trading
Indices · KOSPI open 6,578.17 · high 6,589.69 · low 6,368.49 · close 6,384.24 · KOSDAQ open 885.53 · high 891.79 · low 849.07 · close 849.19 · final regular-session figures (collected independently) · open/high/low align with the Infostock Daily closing report · the first sub-6,400 KOSPI close since Aug. 11 is noted by NewsPim's closing market report
Intraday chart · follows five-minute KOSPI readings during the regular session; horizontal positions represent actual times · all segments other than the confirmed open/high/low/close are rounded to nearby index levels · the reported morning low of 6,417.13 (−3.15%) and flows around 11:40 a.m. came from Sankyeong Today (11:40 a.m.) · the 1:32 p.m. investor-flow figures came from Edaily
Investor totals · KRX 3:38 p.m. tally · closing-report numbers from MoneyToday (3:45 p.m.) and NewsPim
Futures and programs · KRX KOSPI 200 futures investor tally at 3:49 p.m. · regular-session program-trading close at 3:34 p.m. · five-session totals from KRX tallies
Stock and industry investor flows · SK hynix and Samsung Electronics foreign net sales, the electrical and electronics sector by investor class, and other-corporation buying of KRW 648.5bn from Sankyeong Today (4:13 p.m.) · Oct. 8 other-corporation buying of KRW 763.1bn from Economic Times (Oct. 8, 4:32 p.m.) · Sep. 21–22 other-corporation and Sep. 22 foreign figures from Snowshagal's Sep. 22 edition · leading foreign net buys from Pinpoint News (3:56 p.m.)
USD/KRW · 3:30 p.m.-to-3:30 p.m. comparison with the previous Korean trading day · Oct. 12 level of 1,335.1 reported by MoneyToday · KRW 7.7 decline against a different previous reference of 1,342.8 reported by Yonhap News (carried by The Korea Herald) · exporters' dollar sales discussed by Digital Times · opening quote from BetaNews · Oct. 8 daytime close from MoneyToday · comparison with previous overnight close from Infostock Daily
Trading value · KOSPI KRW 21.3299tn, 1.14 times the trailing five-session average of KRW 18.7882tn · 3:38 p.m. tally
Short selling · regular-session short-sale turnover by stock, aggregated across KRX and NXT, in the 3:38 p.m. tally
Market breadth · advancer/decliner counts collected at 4:10 p.m. from KRX · limit-up names counted separately from ordinary advancers
Industry and themes · closing changes and constituent breadth from KRX industry and thematic indices · individual share changes from Infostock Daily · HMM and KT&G from Yonhap News · LG Innotek from Maeil Shinmun · eToday · POSCO Future M's stock-specific catalyst checked against JKN · LS ELECTRIC target price from CBC News · shipping rates and Daishin's assessment from Infostock Daily
Brokerage commentary · Kiwoom and Daishin Securities from iNews24 (4:02 p.m.) · Hana Securities' Lim Seung-mi from Yonhap News · Yuanta Securities and Hana Securities' Kim Du-eon from Financial News · Mirae Asset Securities from Sankyeong Today · report of Samsung Electronics' completed buyback from Herald Economy (Oct. 8)
Exports · Korea Customs Service's Oct. 1–10 trade data from The Korea Economic Daily · approximately +72% working-day-adjusted semiconductor export growth calculated by Snowshagal
Overseas markets · Nasdaq, S&P 500, Dow, Philadelphia Semiconductor Index and U.S. 10-year yield (CBOE 10-year yield index) use independently collected Oct. 8 and 9 U.S. closes · OpenAI revenue-run-rate coverage and Oct. 8 stock returns from NewDaily · Bloomberg's Oct. 9 follow-up via Infostock Daily · nature of the $70bn figure and differences in company revenue-accounting methods from TechCrunch (citing the Financial Times) · Oct. 9 stock performance from Infostock Daily's opening brief
Middle East and oil · Riyadh airport attack and Oct. 9 Brent close from Edaily (Oct. 12, 7:48 a.m. KST) · Oct. 8 Brent close from Financial News · early Oct. 12 Asian-session oil prices from News1 (8:52 a.m. KST) · WTI at 4:10 p.m. KST independently collected · the inflation risks of wider Middle East conflict discussed by Yonhap News
Calendar · U.S. bond-market closure based on SIFMA's recommended holiday schedule · ASML (release around 2 p.m. KST) and TSMC earnings from company investor relations · U.S. inflation releases from the BLS calendar · Bank of Korea policy date from BOK calendar · estimated end of SK hynix buybacks from Daishin Securities

Three Days of PressureReleased All at Once

Each Rebound Set a Lower High

-0.72%A Lower Open, Then Losses Beyond 3%

The Floor Broke After 2 p.m.

Below 6,400 at the Close

A Shock from Abroad, a Selloff Made Worse at Home

The Outside Shock · U.S. Chips Fell While Korea Was Closed

The Domestic Amplifier · Foreign Selling and a Weaker Bid

A Difficult Backdrop for a Rebound · Middle East Tensions and Oil Above $100

Ten Days of Foreign Selling — Over KRW 1tn in SK hynix Alone

Where the Market Held Up — and Where It Did Not

STRONG

WEAK

The Questions from Oct. 8 — Answered Today

What to Watch Next

Three Days of Pressure
Released All at Once