Two Giants Buckled The Forest Followed

DAILY MARKET NOTE / 15 OCT 2026

U.S. Chip Rout
Trips Circuit Breakers

KOSPI -7.57% closed at 5,554.22 · Seventh consecutive decline · Lowest close since April 7 · Seven-session return from the October 2 close of 7,003.74: -20.7% · KOSDAQ also -7.65%Level-one circuit breakers were triggered on KOSDAQ at 12:23 p.m. and KOSPI at 12:38 p.m. · halted all trading for 20 minutes after declines exceeded 8% · First same-day halt in both markets since July 29Overnight, U.S. September CPI came in at 3.7%, above the 3.6% forecast, while concerns about AI data-center operator CoreWeave's debt burden intensified. The overnight toll: -4.30% · KOSPI opened -5.59%Samsung Electronics -9.48% · SK hynix -11.06% · The two accounted for roughly two-thirds of KOSPI's market-capitalization loss · Foreign investors sold a net KRW 3.624tn, about three times the prior session

Overnight inflation and AI financing fears hit semiconductor stocks. With two chipmakers accounting for half its market value, KOSPI fell harder than Japan's and Taiwan's markets.

MARKET PATH / 01

From a -5.6% Open to a Midday Trading Halt

When the selloff accelerated—and where it finally stopped

The session opened down 5.59% · A sell-side was triggered at 9:07 a.m. · By around 10:15 a.m., KOSPI was hovering just above the circuit-breaker threshold (-8%) · The breaker tripped at -8.00% at 12:38 p.m. · After trading resumed, the index rebounded toward 5,590 in the 1 p.m. hour, then hit 5,450.81 (-9.29%) around 2:50 p.m. · It recovered to the 5,550 area by the close

KOSPI · 09:00~15:30Opened at 5,673.01 → High of 5,751.45 around 9:05 a.m. → Trading halted at 12:38 p.m. → Low of 5,450.81 around 2:50 p.m. → Closed at 5,554.22

OPEN5,673.01-5.59%

HIGH5,751.45-4.28%

LOW5,450.81-9.29%

CLOSE5,554.22-7.57%

THE READ

Most of the day's losses were already reflected in the opening price. Korean investors had to absorb the overnight U.S. shock all at once, without a chance to trade while it developed.Both intraday recovery attempts, around 11 a.m. and 1 p.m., stalled near 5,600. The index repeatedly held just above the -8% threshold in the morning before crossing it at 12:38 p.m.A fresh low after trading resumed suggests the selling was not yet exhausted. The next question is whether the 1.9% rebound from the low into the close can carry over to the next session.

OPEN · MORNING

-5.59%The Open: Sell-Side Sidecar at 9:07 a.m.

KOSPI opened at 5,673.01, rose to an early high of 5,751.45 (-4.28%), then retreated. A sell-side KOSPI sidecar at 9:07 a.m. suspended program sell orders for five minutes; KOSDAQ followed at 9:12 a.m.Around 10:15 a.m., the index was near 5,550, just above the circuit-breaker threshold of 5,528.

MIDDAY

12:38 p.m.: Circuit Breaker Halts Trading for 20 Minutes

After rebounding toward 5,600 around 11:15 a.m., KOSPI fell back near 5,540. Level-one circuit breakers were triggered in KOSDAQ at 12:23 p.m. (757.88, -8.01%) and KOSPI at 12:38 p.m. (5,528.05, -8.00%).Trading resumed around 1 p.m. following a 20-minute halt and a 10-minute period.

AFTERNOON

A New Low Around 2:50 p.m.; 5,550 Regained Before the Close

The index hovered around 5,510 immediately after reopening, traded near 5,580–5,590 between 1:20 and 2 p.m., then fell again to an intraday low of 5,450.81 (-9.29%)KOSPI recovered the 5,550 level around 3:15 p.m. and closed at 5,554.22. Turnover totaled KRW 26.8661tn, or 1.21 times the five-session average.

The line traces KOSPI's five-minute intraday path; horizontal positions reflect actual times. Only the open, high, low, close and circuit-breaker trigger are exact plotted values; other levels are approximate. The dashed line marks the -8% circuit-breaker threshold of 5,528.10, calculated from the previous close of 6,008.81. The shaded area covers the trading halt and call auction, when continuous trading was suspended. The previous close lies above the chart's displayed range.

WHY / 02

U.S. Inflation, AI Debt Fears and a Concentrated Chip Market

Why Korean equities fell so sharply

IN PLAIN TERMSA hotter-than-expected U.S. inflation report raised concern about further U.S. rate hikes. At the same time, bond prices at a debt-funded AI data-center operator fell sharply, bringing the financing of AI infrastructure into question. U.S. chip stocks sold off overnight, and Korean chipmakers followed from the opening bell. Yet TSMC projected stronger fourth-quarter revenue, suggesting the day was less a clear signal of collapsing demand than a reassessment of the valuations attached to elevated expectations. Samsung Electronics and SK hynix account for roughly half KOSPI's market capitalization, so their losses had an outsized impact on the entire index.

Overnight in the U.S.: An Inflation Shock and AI Financing Worries

Inflation · U.S. September CPI rose 3.7% year on year (forecast 3.6%; August 3.4%) · rose 2.6% (forecast 2.5%) · Gasoline prices jumped 9.1% month on month · Futures-implied odds of an October rate hike rose from 22.1% the prior day to 51.5% immediately after the release, then eased into the 30% range later that dayAI financing · Shares in CoreWeave, which leases computing capacity from AI data centers, fell -15.46% · Yields on some of its bonds approached 15% · Debt-financed data-center projects came under scrutiny, weighing on AI and semiconductor valuations · The evidence points to financing concerns, not confirmed cancellations of capital spendingU.S. stocks · On October 14, the Nasdaq fell -1.88% · S&P500 -1.11% · The Philadelphia Semiconductor Index fell -4.30% · The Dow lost only -0.09%, highlighting the concentration of selling in AI and semiconductor sharesCounterpoint · In its earnings call, which began about 30 minutes before the Korean close, TSMC guided fourth-quarter revenue to $52.3bn–$54.3bn, approximately 14% above the third quarter and ahead of the market's $50.5bn estimate. CEO C.C. Wei said AI demand was “very robust” and that he saw no sign of slowing. In our reading, chip production expectations remained strong even as the financing of the infrastructure behind AI came under pressure. A outlook does not, however, guarantee demand for memory chips.

-4.30%Philadelphia Semiconductor Index · October 14, U.S. session

Supporting detail

U.S. September CPI was released at 9:30 p.m. KST on October 14 · Headline CPI rose +0.6% month on month; core CPI rose +0.3% (forecast +0.2%) · The Federal Reserve's Beige Book described rising Middle East-driven oil costs spreading through supply chains

The U.S. 10-year Treasury yield touched 5.33% intraday but closed around 5.19%, down 0.03 percentage points from the previous day (market quotes). Rate expectations shifted after the CPI surprise, but longer-term yields gave back their gains. Financing and valuation pressures had a separate, larger impact on AI and semiconductor equities (Snowshagal interpretation). The dollar index reached 102.94 intraday, its highest level in 18 months.

Some CoreWeave bonds reportedly fell to around 80% of face value. This does not mean the company's overall borrowing cost reached 15%. Its chief executive called the market response irrational.

TSMC's fourth-quarter outlook · Gross margin 65%–67% · Operating margin 56.5%–58.5% · Assumed exchange rate TWD 31.8 per U.S. dollar · CEO C.C. Wei also suggested that AI demand could grow faster than previously anticipated

Why Korea Fell Hardest: Two Chipmakers Represent Half the Market

Concentration · At the close, Samsung Electronics (including preferred shares) and SK hynix represented approximately 49.7% of KOSPI's market capitalization. The market lost KRW 375.9tn in value today; about KRW 255tn, or 67.8%, came from these two companies.Share prices · Samsung Electronics -9.48% (KRW 210,000) · SK hynix -11.06% (KRW 1,262,000) · Samsung Electro-Mechanics -15.36% · SK Square -10.21% · Hanmi Semiconductor -11.63%Regional comparison · Japan's Nikkei 225 -4.90% · Taiwan's equity market -3.4% (reported) · Selling in semiconductor and AI shares affected markets across Asia, but KOSPI's decline exceeded those in Japan and TaiwanBrokerage view · Daishin Securities strategist Lee Kyung-min attributed the decline to high-rate pressure, doubts about the sustainability of AI investment, intensifying memory competition, foreign selling and imbalanced domestic flows. CXMT's October 13 server-DRAM plans pose a medium-term competitive risk, but product specifications and mass-production capacity have not been disclosed. Their role in further depressing already weak memory-stock valuations is Snowshagal's interpretation.

Roughly two-thirdsOf KOSPI's market-cap loss came from Samsung Electronics and SK hynix

Supporting detail

Closing market capitalization · Samsung Electronics common shares KRW 1,227.7tn · Preferred shares KRW 127.7tn · SK hynix KRW 921.9tn · Combined KRW 2,277.3tn, or 49.7% of KOSPI's KRW 4,581.2tn total

One-day market-cap losses · Samsung Electronics common shares KRW 128.6tn · Preferred shares KRW 11.6tn · SK hynix KRW 114.7tn · Combined KRW 254.9tn, or 67.8% of KOSPI's KRW 375.9tn decline · Snowshagal calculation based on each stock's closing market capitalization and day-on-day share-price change

Period comparison · KOSPI closed at its lowest since April 7 (5,494.78). The return from its October 2 close of 7,003.74 was -20.7%, based on Korea Exchange closing data.

Japan · Nikkei 225 at 64,425.95 · SoftBank Group and Kioxia were among the AI and semiconductor names hit hard (reported)

MONEY / 03

Foreign Investors Net Sell KRW 3.6tn
Roughly Triple the Previous Day

Who moved the market today

Foreign net selling rose from KRW 1.180tn the previous session to more than KRW 3.6tn. Samsung Electronics and SK hynix drew the largest sales. Institutions and retail investors bought a combined net KRW 2.9tn, but could not arrest the decline. The won weakened as well.

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

-KRW 3.624tn

are included in the foreign-investor total · Preliminary tally immediately after the regular session · Approximately three times October 14's -KRW 1.180tnStock-level selling · Samsung Electronics foreign net flow: -KRW 1.4573tn · SK hynix -KRW 1.1112tn (reported) · Foreign net selling of electrical and electronics shares alone exceeded KRW 3.1tn (reported)Net buyers · Institutions +KRW 1.693tn · Retail investors +KRW 1.289tn · Combined net flow for the three categories was -KRW 642bn, offset by net buying from and other remaining investor categoriesUSD/KRW stood at 1,344.6 at 3:30 p.m., up KRW 6.3 from 1,338.3 at the same time on October 14 (a weaker won). Foreign equity selling coincided with won depreciation, in line with the dollar's overnight rise to an 18-month intraday high.Futures and program trades · Foreign investors bought a net KRW 1.210tn of futures, their fourth straight session of net buying · Program trading recorded net buying of KRW 514.4bn in and KRW 54.4bn in trades · Even as the cash market plunged, overall program flows were net positive

Net buyers of KOSPI sharesInstitutions · Retail investors · Other corporations

Net sellers of KOSPI sharesForeign investors

Detailed flow breakdown

Three principal investor groups · Foreign -KRW 3.624tn · Retail +KRW 1.289tn · Institutions +KRW 1.693tn · KRX Main Market tally at 3:38 p.m. (reported in KRW bn) · Foreign total includes 'other foreign investors' · News reports using KRW 100mn units gave foreign -KRW 3.6241tn, retail +KRW 1.2886tn and institutions +KRW 1.693tn · Other outlets reported foreign selling of -KRW 3.759tn or -KRW 4.8196tn without stating the scope, which may account for the difference
Preliminary cumulative flows · Sum of nine October trading sessions through the 3:38 p.m. tallies: foreign -KRW 18.365tn
Final-tally reporting · Including post-close transactions, KRX final data as cited in news reports show foreign net buying on October 1 followed by eight consecutive net-selling sessions starting October 2 · October total -KRW 17.8345tn · Samsung Electronics -KRW 4.8156tn and SK hynix -KRW 9.2902tn over the same period · These figures use a different scope from the preliminary cumulative total above
Stock-level figures · Today's Samsung Electronics and SK hynix amounts are from Segye Ilbo, which did not identify its tally basis · They are broadly consistent in magnitude with Snowshagal's immediately post-close collection · Because net buying in other stocks offsets some selling, these two amounts should not be interpreted as a simple share of the aggregate net-selling total

Total program trading+KRW 568.9bn

Non-arbitrage program trading+KRW 54.4bn

Institutional · KOSPI 200 futures-KRW 1.317tn

Retail · KOSPI 200 futures+KRW 171bn

Program trading, regular-session close (3:35 p.m.) · The published total of +KRW 568.9bn rounds +KRW 568.85bn calculated from the underlying won amount · Adding the separately rounded arbitrage and non-arbitrage figures yields +KRW 568.8bn · A 9:07 a.m. sell-side sidecar suspended program sell orders for five minutes · Foreign futures net buying does not necessarily signal a bullish directional bet: it may include futures purchased as a substitute for cash equities sold · Futures investor figures use KRX's 3:49 p.m. tally (KRW bn units) · KOSPI 200 cash index closed at 860.70 (-8.13%) versus the December futures contract at 861.30 · The closing spread was +0.60, though cash closed at 3:30 p.m. and futures at 3:45 p.m., so this is not a simultaneous-price comparison
Five-session total (October 8–15) · Foreign KOSPI cash equities -KRW 13.324tn · Institutions +KRW 2.409tn · Retail +KRW 7.575tn · Foreign KOSPI 200 futures +KRW 1.950tn (KRX tally; reported in KRW bn)
KOSDAQ · Foreign +KRW 216bn · Institutions -KRW 163bn · Retail -KRW 67bn (KRX tally, 3:38 p.m.)
Short selling · Value of short sales in KOSPI-listed stocks was KRW 1.2058tn, versus KRW 1.1323tn on October 14 · Combines the KRX regular session (ending 3:30 p.m.) and NEXTRADE main market (ending 3:20 p.m.) · Largest: SK hynix KRW 153.7bn; second, Hanmi Semiconductor KRW 107.8bn, or 35.4% of the stock's trading value · On KOSDAQ, Jusung Engineering KRW 75bn

SECTOR / 04

Where the Market Held Up—and Where It Broke

Breadth and relative strength, not just a ranking

IN PLAIN TERMSNearly nine in ten KOSPI stocks fell. Semiconductor shares and AI power-infrastructure stocks suffered losses of more than 10%. Pharmaceuticals, led by Samsung Biologics, and food and tobacco were among the few pockets of strength.

STRONG

Samsung BiologicsStock+5.50%

PharmaceuticalsKOSPI sector+2.65%

Food & TobaccoKOSPI sector+2.05%

WEAK

Samsung Electro-MechanicsStock-15.36%

Machinery & EquipmentKOSDAQ sector-11.72%

Semiconductor Top 15KRX thematic index-11.61%

AI Power InfrastructureKRX thematic index-10.40%

Electrical & ElectronicsKOSPI sector-10.13%

Even some rising sector indices had more decliners than advancers. Just 12.5% of KOSPI stocks rose, October's lowest reading (versus 18.2% on October 12); the KOSDAQ figure was 6.6%.Market breadth · KOSPI: 115 advancers (including two at the daily upper limit), 789 decliners and 15 unchanged; advancers accounted for 12.5%, versus 55.0% on October 14 · KOSDAQ: 6.6% advancers (115 up, 1,592 down)By size · KOSPI 200 -8.13% · KOSPI -7.57% · KOSDAQ -7.65% · Larger-cap shares fell more sharplySemiconductors · All constituents of both the Semiconductor Top 15 and AI Semiconductor indices declined · KOSDAQ equipment names Eugene Technology -16.57% · Wonik IPS -15.47% · Jusung Engineering -14.97%AI power equipment · KRX-Akros AI Power Infrastructure -10.40% (all 15 stocks down) · Questions about AI data-center spending spread beyond chipmakers to power-equipment suppliers (Snowshagal interpretation)Yesterday's leaders · Secondary Battery TOP 10 -6.43% (versus October 14's +3.81%); all 10 stocks declined · Defense TOP5+ -6.07% · Shipbuilding TOP10 -5.44%Relative resilience · Pharmaceuticals +2.65%, although only eight of 56 constituents rose; Samsung Biologics' large market capitalization likely drove most of the index gain (Snowshagal interpretation) · Food & Tobacco +2.05% (15 of 47 constituents up) · Financials -4.38%, also down less than KOSPI · KB Financial -1.57%

Sector returns are drawn from KOSPI and KOSDAQ industry indices, thematic returns from KRX thematic indices, and stock returns from individual closing prices. Their construction differs, so they should not be treated as one directly comparable ranking.

Sector-level evidence

Semiconductors · Semiconductor Top 15 -11.61% (all 15 declined) · KRX AI Semiconductor -11.52% (all 20 declined) · K-AISemiconductor TOP2+ -11.74% · KOSPI Electrical & Electronics -10.13% (2 of 80 advanced) · KOSDAQ Electrical & Electronics -9.65% · KOSDAQ Machinery & Equipment -11.72% (9 of 177 actively traded stocks advanced)
Versus the previous session · Semiconductor Top 15 -3.50% → -11.61% · AI Power Infrastructure +2.02% → -10.40% · Secondary Battery TOP 10 +3.81% → -6.43% · Shipbuilding TOP10 +1.38% → -5.44% · K-AIDefense TOP5+ +0.93% → -6.07%
KOSPI industries · Pharmaceuticals +2.65% · Food & Tobacco +2.05% · Entertainment & Culture +0.22% · Telecommunications -1.00% · General Services -1.82% · Non-Metals -1.84% · Real Estate -2.00% · Electric & Gas Utilities -2.06% · Transportation & Warehousing -2.41% · Textiles & Apparel -2.42% · Paper & Wood -2.58% · Chemicals -3.57% · IT Services -3.66% · Insurance -3.87% · Financials -4.38% · Transportation Equipment & Parts -4.51% · Metals -5.07% · Distribution -5.37% · Construction -5.97% · Securities -6.01% · Machinery & Equipment -8.44% · Manufacturing -8.61% · Medical & Precision Instruments -8.87% · Electrical & Electronics -10.13%
KOSDAQ industries · Publishing & Media Reproduction +16.79% (one of two stocks advanced) · Entertainment & Culture -1.09% · Pharmaceuticals -3.87% · IT Services -4.33% · Financials -6.55% · Chemicals -7.37% · Manufacturing -8.71% · Electrical & Electronics -9.65% · Non-Metals -11.66% · Machinery & Equipment -11.72%
Thematic indices · Bio TOP 10 0.00% (three of 10 stocks rose) · KOSPI High Dividend 50 -1.12% · KOSDAQ TOP 10 -9.19% (all 10 declined)
Top 10 stocks by market capitalization · Samsung Electronics -9.48% (KRW 210,000) · SK hynix -11.06% (KRW 1,262,000) · Samsung Electronics preferred -8.35% · SK Square -10.21% · LG Energy Solution -4.62% · Samsung Electro-Mechanics -15.36% · Hyundai Motor -5.74% · Samsung Biologics +5.50% · KB Financial -1.57% · Samsung Life -7.51%
Advancers and decliners · KOSPI: 2 limit-up, 113 additional gainers, 15 unchanged, 789 lower, none limit-down · KOSDAQ: 5 limit-up, 110 additional gainers, 33 unchanged, 1,591 lower, 1 limit-down
Share of advancers · KOSPI 12.5% (115/919) · KOSDAQ 6.6% (115/1,740) · Numerator includes both ordinary gainers and limit-up stocks; denominator includes all gainers, limit-up, unchanged, decliners and limit-down stocks
KOSDAQ turnover was KRW 6.5971tn, 0.96 times its five-session average
Constituent counts refer to stocks traded that day · KOSPI 200 finalized cash index: 860.70, versus 936.82 in the previous session
Industry returns are market-cap-weighted index changes, not net capital inflows by sector

CHANGE / 05

Yesterday's Questions, Today's Answers

Checking the tests set in the previous report

YESTERDAY → TODAY

01 U.S. inflation exceeded expectations · 02 Foreign net selling increased to roughly triple the previous day's level, failing both tests · 03 The KOSPI share of advancers fell to 12.5%, and the index declined for a seventh straight session, failing both testsScheduled results · TSMC's third-quarter revenue of $46.72bn exceeded the high end of its $45.8bn guidance · was 66.4%, within the company's 65%–67% forecast but below the previous quarter's 67.7% · Net profit beat the LSEG market estimate by roughly 2% · TSMC shares -2.01%Correction · The October 14 report described an SK hynix buyback completion around October 16 as a Daishin Securities estimate. That date actually came from a media calculation assuming purchases of 650,000 shares a day would continue. Daishin had reported only that 83% of the intended purchase amount had been completed as of October 6. The disclosed acquisition window runs through November 19.

U.S. September CPI, year on year · Actual versus forecast

3.6%

→

3.7%

Foreign KOSPI cash selling · Did it ease?

-KRW 1.180tn

→

-KRW 3.624tn

KOSPI share of advancers · Did it hold above 50%?

55.0%

→

12.5%

01: Forecast 3.6% → actual 3.7%, therefore 'above forecast'; core CPI 2.6% versus a 2.5% forecast · 02: KRX 3:38 p.m. tally; selling exceeded the first-stage benchmark of KRW 1.180tn, and flows did not turn positive, so both stages failed · 03: Failed the first-stage threshold of at least 50% advancing; KOSPI's seventh consecutive decline also failed stage two

NEXT / 06

What to Watch Next Session

Three tests for tonight and October 16

Can U.S. Chip Stocks Bounce After One Day?

Judge by the October 15 U.S. close of the Philadelphia Semiconductor Index · Stage 1: finish higher · Stage 2: regain at least half the points lost on October 14, reaching 11,946.6 or above (+2.24%)

Will Foreign Net Selling Ease?

Today's foreign net selling was KRW 3.624tn · Stage 1: October 16 selling is smaller than today's · Stage 2: turn to net buying · Use the KRX 3:38 p.m. tally

Will KOSPI Hold Today's Intraday Low?

Today's low was 5,450.81 · Stage 1: October 16 intraday low stays above that level · Stage 2: meet stage one and close higher for the first time in eight sessions

Upcoming dates

Oct. 22 · Bank of Korea Monetary Policy Board · 10/27~28U.S. Federal Reserve meeting

The market made another low even after circuit breakers halted trading. The next clues are tonight's U.S. semiconductor reaction and whether KOSPI can hold 5,450.81 on October 16.

Sources and Data Conventions

Reference date: October 15, 2026 · Index, industry and individual stock closes are from the Korea Exchange regular session 09:00~15:30data
International news and indicators · Only information released before 8 p.m. KST on October 15 is included
Domestic flows · KRX regular-session tally as of 3:38 p.m. · No post-close alternative-market flows are mixed in
Indices · KOSPI open 5,673.01 · High 5,751.45 · Low 5,450.81 · Close 5,554.22 · KOSDAQ open 784.45 · High 788.69 · Low 745.43 · Close 760.82 · Final regular-session values collected by Snowshagal · Lowest close since April 7 and seventh straight decline also covered by Infostock Daily
Sidecar and circuit breakers · Trigger times and index levels reported by Korea JoongAng Daily · eToday · Sidecar times additionally from Alpha Economy · Asia Economy
Intraday chart · Traces the KOSPI five-minute regular-session path; x-axis placement follows actual times · Only OHLC values and the circuit-breaker trigger level are exact data labels; other intervals are approximate
Investor flows · KRX Main Market tally at 3:38 p.m.; foreign total includes 'other foreign investors' · Closing figures in KRW 100mn units and Daishin Securities strategist Lee Kyung-min's comments reported by Asia Economy · Alternative figures published by Infostock Daily⁠·⁠NewsPim · Stock-level and Electrical & Electronics sector selling from Segye Ilbo · Consecutive selling days and October cumulative flows based on the final tally from Gangwon Domin Ilbo
Futures and program trading · KRX investor-level KOSPI 200 futures tally as of 3:49 p.m. · Regular-session program trading tally as of 3:35 p.m. · Five-session totals use KRX data · Preliminary October cumulative flows are Snowshagal calculations summing the 3:38 p.m. tallies
USD/KRW · Both rates observed at 3:30 p.m., matching the same time on consecutive Korean equity trading days · October 15 rate of KRW 1,344.6 reported by NewsPim · October 14 rate of KRW 1,338.3 from Newsis (republished by Segye Ilbo)
Turnover · KOSPI KRW 26.8661tn · Five-session average KRW 22.1895tn · Ratio 1.21 times · KRX tally at 3:38 p.m.
Market capitalization · KOSPI aggregate and one-day decline from NewsPim · Individual market-cap figures collected by Snowshagal using regular-session closing prices
Short selling · Combines the Korea Exchange regular session and NEXTRADE main market · KRX tally at 3:38 p.m.
Market breadth · Final KRX counts of advancing and declining stocks · Limit-up stocks are counted separately from ordinary advancers
Industries and themes · Closing returns of KRX industry and thematic indices, along with constituent advancer/decliner counts · Individual-stock returns from Alpha Economy · Infostock Daily
U.S. markets · Nasdaq, S&P 500, Dow, Philadelphia Semiconductor Index and U.S. 10-year Treasury yield use October 14 U.S. closing figures collected by Snowshagal · CPI, rate-hike probabilities, dollar index and CoreWeave reporting from Jungang Economy News · Monthly CPI figures and the Beige Book from Infostock Daily · CoreWeave bonds from TradingKey
Asia · Nikkei 225 close and Taiwan-market performance from News1
TSMC · Third-quarter results and Taiwan-market share performance from Infostock Daily · Fourth-quarter outlook and comments by CEO C.C. Wei from Investing.com (earnings-call transcript) · Fourth-quarter consensus estimate from Hugging News · Net-profit comparison with market expectations from Report citing Reuters
Calendar · U.S. CPI from Bureau of Labor Statistics release schedule · BOK monetary-policy meeting from Bank of Korea schedule · SK hynix buyback window and Daishin Securities completion estimate from NoCut News · October 16 completion estimate assuming 650,000 shares purchased daily from Sisa Journal e (September 15)