Good News Became a Reason to Sell · an autumn tree shedding golden leaves in the wind · Samsung Electronics posts record profit but shares sell off · KOSPI 6,625.93 -2.62% · KOSDAQ 892.27 -0.69%
2026.10.08
Snowshagal Daily

Good News Became
a Reason to Sell

KOSPI6,625.93 -2.62%
KOSDAQ892.27 -0.69%
TODAY IN ONE LINE Samsung: record profit, then sell-the-news
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SNOWSHAGAL · DAILY
MARKET RESEARCH
2026.10.08 · THU
KRX CLOSE 15:30
DAILY MARKET NOTE / 08 OCT 2026

Record KRW 107tn Profit,
KOSPI Closes at the Day's Low

KOSPI -2.62% at 6,625.93 · down for a third straight session · the open was near the high and the close was the day's low · KOSDAQ -0.69% at 892.27Samsung Electronics posted record Q3 operating profit of KRW 107.4tn · only modestly above recently lowered market expectations, turning the release into a profit-taking trigger · shares -2.42%Options expiry · semiconductor ETF rebalancing · pre-holiday caution all hit on the same day · foreign investors -KRW 1.988tn  · institutions -KRW 1.671tn net sellers as wellShare of advancers: KOSPI 27.7% · weakness spread to financials, pharmaceuticals, autos and defense

KRW 107tn was not too small; flows and the discount rate simply mattered more today.
MARKET PATH / 01

The First Five Minutes Set the High; the Close Set the Low

Where the direction changed, and where the decline stopped

IN PLAIN ENGLISHThe market opened slightly higher but turned lower within the first five minutes · it rebounded once in the morning and once in the afternoon, but each rebound topped out below the previous one · another push lower in the closing auction left the index at its low of the day

KOSPI · 09:00~15:30Open 6,808.68 (high 6,810.83) → 6,730 area at 09:55 → rebound to 6,790 area at 10:45 → 6,650 area at 12:55 → rebound to 6,725 area at 14:05 → 6,660 area at 15:15 → closed at the low in the closing auction
6,803.90 09:00 12:00 15:30
OPEN6,808.68+0.07%
LOW6,625.93-2.62%
HIGH6,810.83+0.10%
CLOSE6,625.93-2.62%
THE READ

Post-earnings optimism ended at the open · the index had already turned lower in the first five-minute barTwo rebounds · around 6,790 at 10:45 and 6,725 at 14:05 · the second rebound peaked below the firstThe decline that had paused around 6,650 at 12:55 broke below that level in the closing auction · options expiry and ETF rebalancing overlapped, but the final leg lower cannot be cleanly attributed to any single flow bucketKOSDAQ fell as low as 883.85 intraday before closing at 892.27 · roughly one-quarter of the KOSPI's decline

OPEN · MORNING

+0.07% start; turned lower within five minutes

Opened at 6,808.68, 4.78 points above the previous close · first five-minute bar set the high at 6,810.8309:05 6,777.41 · 09:10 around 6,755 · rebound to around 6,785 at 09:15 · 6,730–6,740 area from 09:40 to 09:55Rebounded from 10:15 to around 6,790 at 10:45

MIDDAY · AFTERNOON

Below 6,700 around midday; around 6,650 at 12:55

11:10 around 6,750 · 11:50–12:05 around 6,725–6,73012:10 around 6,700 · rebound to around 6,720 at 12:25, then lower again12:40 around 6,670 · 12:55 around 6,650

CLOSE

Rebound to 6,725 around 14:05; the close was the low

Rebounded from 13:25 to around 6,725 at 14:05 · turned lower again after 14:25, reaching around 6,665 at 14:5515:00–15:15 around 6,660–6,670 · and finished at the day's lowKOSPI turnover KRW 23.1954tn · 1.29× the five-session average

The line follows the KOSPI five-minute chart · horizontal positions reflect actual times · only the open, high, low, close and the reported 09:05 level are exact numeric observations · the high came in the first five minutes · the low was the close · the 6,650 area at 12:55 was the low during continuous trading · the dashed line marks the previous close at 6,803.90.
WHY / 02

Flows and the Discount Rate Overwhelmed KRW 107tn

Why the market fell today

IN PLAIN ENGLISHSamsung Electronics delivered record profit, but only modestly beat recently lowered expectations, turning the release into a profit-taking trigger · options expiry, semiconductor-fund rebalancing and the next-day holiday converged, with foreign investors and institutions both selling · U.S. equity declines overnight were small, but long-term Treasury yields reached levels not seen in 24 years

01

A record, but only modestly above expectations · the release became a profit-taking trigger

Samsung Electronics Q3   · revenue KRW 195tn · operating profit KRW 107.4tn, a quarterly recordStill, the result was only modestly above recently lowered market expectations of KRW 105.5–106.9tn, depending on the source · Meritz Securities called it a solid beat of a KRW 104tn market bar and roughly in line with its own KRW 106.1tn estimate · the preliminary release does not include business-segment figuresKiwoom Securities said the market's focus is shifting from this year's numbers to whether earnings can remain strong into next year and beyondThe shares rose as high as KRW 270,000 early in the session before closing -2.42% at KRW 262,000 · Daishin Securities said selling emerged · in other words, the release became a catalyst for profit-taking (interpretation)

-2.42%Samsung Electronics · day of KRW 107.4tn operating-profit release
SHOW EVIDENCE
Samsung Electronics release · revenue KRW 195tn · operating profit KRW 107.4tn · q/q revenue +13.70% · q/q operating profit +20.01% · y/y revenue +126.59% · y/y operating profit +782.50%
Meritz Securities · a solid result modestly above a KRW 104tn market bar and close to its own KRW 106.1tn estimate · memory was estimated to have contributed KRW 2.2tn more than recent forecasts
Early session · 09:05 Samsung Electronics KRW 269,000 (+0.19%) · SK hynix KRW 1,732,000 (+0.52%) · intraday high of KRW 270,000 based on closing reports
Close · SK hynix -2.44%(KRW 1,681,000) · SK Square -8.06%  · reports said there was no company disclosure or management-related announcement
02

Options expiry · ETF rebalancing · pre-holiday caution · foreign and institutional selling converged

October   · seven semiconductor ETFs with roughly KRW 19tn in AUM were scheduled to on the same day · the first event day after Samsung Electronics completed its share buybackThe next day was the Hangul Day market holiday, creating a three-day break · Daishin Securities said caution ahead of the holiday amplified the declineDaishin Securities said net selling continued from foreign investors and institutions, especially financial investment firms · foreign investors were net sellers for a ninth straight session · institutional net selling more than doubled from the previous session

-KRW 3.659tnCombined foreign + institutional KOSPI net selling · KRX 15:38 tally
SHOW EVIDENCE
Calculation · foreign investors KRW 1.988tn + institutions KRW 1.671tn = KRW 3.659tn net selling · retail investors bought KRW 2.906tn on the same tally · separate other-corporation and other-foreign-investor categories mean the three headline figures do not sum to zero
Goldman Sachs had flagged Oct. 8 as a Samsung Electronics-centered short-term volatility event because earnings, ETF rebalancing, options expiry and the end of the buyback coincided (reported in the previous session)
03

Long-Term Yields at a 24-Year High · FOMC Minutes Reaffirm Another-Hike Path

On Oct. 7 U.S. time, the 10-year Treasury yield reached 5.36% intraday, the highest since 2002 · strong demand at the 10-year auction pulled it back to around 5.28% by the close · the 30-year yield reached 5.73% intradaySeptember FOMC minutes · most participants judged that one additional increase by year-end would likely be appropriate · more a reaffirmation of the higher-rate path than a new signal (interpretation)U.S. index declines were small · S&P 500 -0.22%  · Nasdaq -0.22%  · Philadelphia Semiconductor Index -1.15%  · KOSPI -2.62% · the widening gap to KOSPI's decline suggests domestic flow events amplified the move (interpretation)

5.36%U.S. 10-year intraday high · Oct. 7 local time
SHOW EVIDENCE
Oct. 7 local close · Nasdaq 27,538.69 · S&P 500 7,801.77 · Dow -0.66%  · Nvidia -0.74% · AMD -0.55%  · SK hynix ADR -2.36% ($178.25) · Micron +4.06%
10-year Treasury auction · $39bn · high yield 5.3% · bid-to-cover 2.77×, highest since 2016 · 10-year close 5.277% (CBOE 10-Year Treasury Note Yield Index)
Brent traded in the $102/bbl area intraday amid Middle East tensions · WTI was in the $91 area on the afternoon of Oct. 8 Korea time
MONEY / 03

Foreign Selling Extends to Nine Sessions; Institutions Sell KRW 1tn+

Who moved the index today

IN PLAIN ENGLISHForeign selling eased from the previous session, but institutions sold more than KRW 1.6tn · both groups concentrated selling in electrical & electronics, home to Samsung Electronics and SK hynix · retail investors bought KRW 2.9tn · the won actually strengthened modestly

FOREIGN · KOSPI CASH · KRX 15:38 TALLY
-KRW 1.988tn

included in the foreign total · nine straight sessions of net selling since Sep. 23 · smaller than the previous session's -KRW 2.598tnInstitutions -KRW 1.671tn  · previous session -KRW 668.0bn → net selling widened · retail +KRW 2.906tnStock-level foreign flows · SK hynix -KRW 853.6bn  · SK Square -KRW 353.9bn  · Samsung Electronics -KRW 290.7bn , in that orderStock-level institutional flows · Samsung Electronics -KRW 1.0779tn  · Samsung Electro-Mechanics -KRW 159.7bn  · Hanwha Aerospace -KRW 95.5bn , in that order · at Samsung Electronics, institutional selling exceeded foreign sellingBy sector, in KOSPI electrical & electronics alone, foreign investors sold -KRW 1.5038tn  · institutions -KRW 1.3013tnSame-direction flows · foreign investors were net sellers of index futures for a third straight session · both arbitrage and program trading were net sellers · figures come from different datasets and are not added togetherThe onshore USD/KRW close was KRW 1,338.5 per dollar, down KRW 1.9 · that makes it difficult to describe the foreign selling as capital flight accompanied by a sharp FX move (interpretation)

KOSPI NET BUYERSRetail investors
KOSPI NET SELLERSForeign investors · institutions
FLOW DETAILS
Three investor groups · foreign -KRW 1.988tn · retail +KRW 2.906tn · institutions -KRW 1.671tn · KRX 15:38 tally (KRW 1bn units) · foreign total includes other foreign investors · closing reports: foreign -KRW 1.9907tn · retail +KRW 2.9027tn · institutions -KRW 1.6659tn
Stock- and sector-level flows · KRX/Yonhap Infomax regular-session closing tallies (reported) · values rounded to KRW 100mn units · internally collected figures that mix in after-market trades are not used
Other corporations +KRW 763.1bn · based on closing report · scope differs from the three figures above, so they are not added together
Total program trading-KRW 1.1236tn
Arbitrage program-KRW 245.5bn
KOSPI 200 futures · foreign-KRW 1.247tn
KOSPI 200 futures · institutions+KRW 1.400tn
Non-arbitrage program -KRW 878.1bn · -KRW 211.2bn → -KRW 1.2586tn → -KRW 1.9003tn → -KRW 878.1bn · eighth straight session of net selling · KOSPI 200 futures retail -KRW 146.0bn · futures based on KRX 15:49 tally (KRW 1bn units)
Five-session total (Oct. 1–8) · KOSPI foreign -KRW 7.029tn · institutions -KRW 1.625tn · retail +KRW 3.052tn · KOSPI 200 futures foreign -KRW 1.042tn (KRX tally · KRW 1bn units)
Versus previous session · retail +KRW 2.557tn → +KRW 2.906tn · KOSDAQ foreign -KRW 261.0bn → +KRW 60.0bn · all based on KRX 15:38 tally (KRW 1bn units)
KOSDAQ · foreign +KRW 60.0bn · institutions -KRW 107.0bn · retail +KRW 51.0bn (KRX 15:38 tally)
Short-selling turnover: No. 1 Samsung Electronics KRW 365.1bn · No. 2 SK hynix KRW 288.4bn · both rose from KRW 192.6bn and KRW 253.8bn respectively in the previous session · No. 3 SK Square KRW 87.9bn
SECTOR / 04

Where the Market Was Strong · Where It Was Weak

Today’s distribution of strength mattered more than a ranking

IN PLAIN ENGLISHFewer than three in ten KOSPI stocks advanced · financials, insurance, securities, pharmaceuticals/biotech, autos, defense and shipbuilding all sold off sharply · only parts of semiconductor equipment and secondary batteries rose, with LG Energy Solution providing an earnings catalyst for batteries

Semiconductor equipment and secondary batteries held up, while financials, biotech and autos sold off sharply.Secondary batteries had an earnings catalyst · LG Energy Solution Q3 revenue reached a quarterly record KRW 9.6434tn · operating profit KRW 756.0bn, far above the KRW 339.3bn market consensus compiled by Yonhap Infomax · LG Energy Solution +2.56% had a direct catalyst · KRX Secondary Battery TOP 10 also +1.30% (6 of 10 constituents higher)KOSPI Financials -4.11% (116 of 141 constituents lower) · Insurance -3.23% (12 of 13 lower) · Securities -3.19% (27 of 29 lower) · KB Financial Group -3.38%  · Samsung Life Insurance -4.27%Pharma & biotech · KOSPI Pharmaceuticals -3.69% (44 of 55 lower) · KRX Technology Transfer Bio -6.86% (all 15 constituents lower) · Samsung Biologics -4.54%Autos · defense · shipbuilding · Transportation Equipment & Parts -3.94%  · Hyundai Motor -3.42%  · KRX K-AI Defense TOP5+ -4.31%  · Shipbuilding TOP10 -3.86%  · all 10 constituents fell in both indicesOnly the mega-cap end of semiconductors was weak · KRX Semiconductor Top 15 -0.27% yet 10 of 15 constituents rose · Jusung Engineering +8.08%  · LEENO Industrial +3.17%  · Wonik IPS +1.98%  · KOSDAQ Machinery & Equipment +1.49% (96 of 178 constituents higher) · by contrast, K-AI Semiconductor TOP2+ -2.97%  · SK Square -8.06% -2.71% versus KOSPI -2.62% · a slightly larger declineShare of advancers: KOSPI 27.7% · KOSDAQ 36.0% · KOSPI fell further from 36.5% in the previous session

STRONG

LG Energy SolutionStock+2.56%
Machinery & EquipmentKOSDAQ sector+1.49%
Secondary Battery TOP 10KRX theme index+1.30%

WEAK

Technology Transfer BioKRX theme index-6.86%
K-AI Defense TOP5+KRX theme index-4.31%
FinancialsKOSPI sector-4.11%
Transportation Equipment & PartsKOSPI sector-3.94%

Sectors use KOSPI/KOSDAQ industry indices · themes use KRX theme indices · stocks use individual closing returns · methodologies differ, so they are not combined into a single ranking

SECTOR DETAILS
Versus previous session · Semiconductor Top 15 -3.65% → -0.27% · K-AI Secondary Battery -2.70% → +0.92% · K-AI Defense TOP5+ -5.37% → -4.31% · Shipbuilding TOP10 -3.84% → -3.86% · Game TOP 10 +1.71% → -4.60%
KOSPI sectors · Textile & Apparel +0.09% · Real Estate +0.02% · Chemicals -0.35% · Medical & Precision Instruments -0.69% · Electrical & Electronics -2.28% · Machinery & Equipment -2.36% · Electricity & Gas -2.69% · Securities -3.19% · Insurance -3.23% · Distribution -3.42% · Pharmaceuticals -3.69% · Transportation Equipment & Parts -3.94% · Financials -4.11%
KOSDAQ sectors · Publishing & Media Reproduction +2.00% · Machinery & Equipment +1.49% · Non-metallic Minerals +1.34% · Electrical & Electronics +0.58% · Medical & Precision Instruments -1.60% · General Services -3.22% · Pharmaceuticals -3.47%
Themes · KRX K-AI Biotech KOSDAQ -6.64% (19 of 20 constituents lower) · KRX Bio TOP 10 -4.07% · KRX-Akros AI Power Infrastructure -3.06% · KRX Blue Chip 25 -3.03% · KOSDAQ 150 Governance +1.46% (6 of 22 constituents higher)
Top 10 by market cap · Samsung Electronics -2.42% (KRW 262,000) · SK hynix -2.44% (KRW 1,681,000) · Samsung Electronics Preferred -2.02% · SK Square -8.06% · Samsung Electro-Mechanics -3.62% · LG Energy Solution +2.56% · Hyundai Motor -3.42% · KB Financial Group -3.38% · Samsung Biologics -4.54% · Samsung Life Insurance -4.27%
Advancers/decliners · KOSPI: 3 limit-up, 252 higher, 40 unchanged, 625 lower, 0 limit-down · KOSDAQ: 13 limit-up, 618 higher, 88 unchanged, 1,031 lower, 1 limit-down
Share of advancers · KOSPI 27.7% (255/920) · KOSDAQ 36.0% (631/1,751) · numerator = advancers + limit-up stocks; denominator = limit-up + higher + unchanged + lower + limit-down
KOSDAQ turnover KRW 7.6341tn · 0.95× the five-session average
LG Energy Solution · y/y operating profit +25.7% · revenue +59.0% · operating profit includes an estimated KRW 416.9bn of U.S. production tax credits · operating profit excluding the credit: KRW 339.1bn
Constituent counts reflect stocks traded that day · KOSPI 200 cash index collected from KRX at 16:08: 1,044.52 (previous session 1,073.63)
Sector returns are market-cap-weighted index changes, not net inflow amounts · a single day’s move is not enough to conclude that money rotated into or out of a sector
CHANGE / 05

Answers to Yesterday’s Questions

Checking yesterday’s conditions against today’s close

IN PLAIN ENGLISHSamsung Electronics beat expectations but its shares fell · foreign selling eased, but institutional selling increased · the semiconductor index slipped, yet 10 of 15 constituents rose

YESTERDAY → TODAY

Earnings question: YES · share-price reaction: the opposite directionForeign selling eased, but institutional selling increased by more, leaving the two groups with larger combined net sellingThe semiconductor index stayed negative, but most stocks outside the two mega-caps rebounded

01
Samsung Electronics Q3 operating profit · versus market expectations
KRW 105.5–106.9tn
→
KRW 107.4tn
02
Foreign KOSPI cash net selling · did it ease?
-KRW 2.598tn
→
-KRW 1.988tn
03
KRX Semiconductor Top 15 · did the decline continue?
-3.65%
→
-0.27%
NEXT / 06

What to Watch Next Session

Three checks for the Oct. 12 close
Options expiry is over, but ETF rebalancing remains on Oct. 12: does foreign + institutional selling ease?

Today the two groups sold a combined KRW 3.659tn · Kiwoom Securities said another ETF rebalancing is scheduled for Oct. 12 · score it on whether their combined net selling in the KRX 15:38 tally is smaller than today

Does strength in semiconductor equipment spread to the two mega-caps?

Today 10 of 15 KRX Semiconductor Top 15 constituents rose, yet Samsung Electronics closed -2.42% and SK hynix -2.44% · score it on the sign of the two stocks' closing returns

Do oil and U.S. rate pressures intensify over the holiday?

After today's close Brent moved into the $104 area · U.S. 10-year closed at 5.277% on Oct. 7 local time · score it on the Oct. 9 local close: Brent above $100 and the 10-year above 5.3%

Flows mattered more than KRW 107tn · on Oct. 12, the remaining ETF rebalancing will meet three days of accumulated moves in oil and rates.

Full index, FX, rates and commodities data are in MARKETThe Daily keeps only the numbers needed to explain today’s session.
MARKET ↗
SOURCES · DATA BASIS
Reference date: 2026.10.08 · index, sector and individual-stock closes use the KRX regular session, 09:00–15:30
Overseas news and indicators · only information released by 20:00 KST on Oct. 8 is included
Domestic flows · KRX regular-session tally as of 15:38 · after-market flows are excluded
Indices · KOSPI open 6,808.68 · high 6,810.83 · low 6,625.93 · close 6,625.93 · KOSDAQ open 898.19 · high 903.12 · low 883.85 · close 892.27 · confirmed regular-session values (internal collection) · open, high and close match the Digital Daily closing report
Intraday chart · path read from the KOSPI regular-session five-minute chart, with horizontal positions representing actual times · outside the four confirmed OHLC values, intermediate levels are shown only as ranges · the 09:05 level of 6,777.41 and early-session stock prices come from the NewsPim opening-market report
Investor totals · KRX 15:38 tally · closing-report figures from Digital Daily (16:19) · reports including Nextrade figures (NewsPim) use a different scope and are not mixed with the KRX-only tally
Futures & program trading · KOSPI 200 futures investor data from KRX 15:49 tally · regular-session program-trading closing tally at 15:37 · five-session totals use KRX data
Stock- and sector-level flows · foreign stock-level data from Yonhap News  · institutional stock-level data from Yonhap News  · foreign/institutional flows in Electrical & Electronics and semiconductor-equipment stock returns from Yonhap News (KRX/Yonhap Infomax regular-session closing tally) · other corporations +KRW 763.1bn from Economic Times (16:32) · USD/KRW close from NewsPim closing report
Turnover · KOSPI KRW 23.1954tn · five-session average KRW 17.9130tn · 1.29× · 15:38 tally
Short selling · stock-level short-selling turnover from 15:38 regular-session tally (KRX + Nextrade combined)
Market breadth · KRX counts of advancing/declining issues collected at 16:10 · limit-up stocks are counted separately from ordinary advancers
Sectors & themes · KRX industry-index and theme-index closing returns and constituent advance/decline counts
Samsung Electronics · Q3 preliminary results from Samsung Electronics release  · market-expectation range uses the same reports as the previous issue (eToday · NewsPim) · sell-the-news, pre-holiday caution and financial-investment-firm selling commentary from Daishin Securities (NewsPim closing report · iNews24) · KRW 270,000 intraday high and Kiwoom Securities commentary from Digital Daily  · SK Square from JKN
Oct. 8 schedule · rebalancing of seven semiconductor ETFs with roughly KRW 19tn in AUM, options expiry, end of buyback and Goldman Sachs analysis from EBN (Oct. 7) · same-day rebalancing of seven ETFs from ChosunBiz (15:10) · additional Oct. 12 ETF rebalancing schedule (Kiwoom Securities) from NewsPim Morning Report (08:08) · Economic Times  · Meritz Securities assessment from NewsPim report briefing (10:02)
LG Energy Solution · Q3 preliminary results and U.S. production tax-credit estimate from BizTribune  · quarterly-record revenue from Today Newspaper  · market consensus of KRW 339.3bn (Yonhap Infomax compilation) from Yonhap News  · operating profit excluding the production tax credit from Yonhap News
Overseas · Nasdaq, S&P 500, Dow, Philadelphia Semiconductor Index and U.S. 10-year (CBOE 10-Year Treasury Note Yield Index) use Oct. 7 local closes · intraday highs in the 10-year/30-year and oil from MoneyToday  · 10-year auction from Block Media  · semiconductor-stock returns from News1  · SK hynix ADR close from TopStarNews  · September FOMC minutes from Federal Reserve minutes · NewDaily  · post-close oil from Financial News (17:24 · prices as of 16:45 KST)
Calendar · Hangul Day closure based on KRX holiday calendar · Oct. 12 ETF rebalancing per Kiwoom Securities
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