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Market wrap · Tuesday, October 13, 2026

KOSPI falls 5.5% as China's CXMT DRAM threat and foreign selling hit Samsung, SK hynix

KOSPI−5.5%KOSDAQ−1.4%KOSPI 200−6.3%

KOSPI closed down 5.5% at 6,035.35, with chipmakers at the center. Sources attribute the drop to China's CXMT saying it would unveil next-generation server DRAM, raising worries about Korean memory makers' market share and pricing power. A sell-side sidecar was triggered in the morning, and the index fell as low as 5,911 intraday before institutions and buybacks by other corporates trimmed the loss. The end of Samsung Electronics' buyback, with SK hynix's nearing completion, was also cited as removing demand to absorb foreign selling. SK hynix fell 10.1%, Samsung Electronics 7.4%, SK Square 12.9% and Samsung Electro-Mechanics 8.3%.

The chip drop spread to HBM and AI chip names, foundry and design, and equipment. Overnight, the Philadelphia semiconductor index fell 2.7%, and comments from Broadcom and Intel executives on funding burdens raised doubts about AI data center spending. Outside chips, LG Energy Solution rose 3.0%. Separately, APR fell 19.6% after brokerages cut earnings expectations and target prices, and Shinhan Financial's deal to buy Lotte Non-Life Insurance lifted the target by 7.9%.

Why the market moved

KOSPI fell on worries after China's CXMT said it would unveil next-generation server DRAM, heavy foreign selling and the end of Samsung Electronics' buyback.1234

Top themes

Cybersecurity

AI hacking at financial firms lifts security demand hopes12

  • Ahnlab, Security demand hopes after bank breaches+10.51%
  • RaonSecure, Security stocks rose together+6.06%

Chip equipment names

Select equipment makers rose despite chip selloff12

Banks

Shinhan Financial to acquire 77% of Lotte Non-Life Insuranc…123

The big stories

KOSPI falls 5.46% as CXMT server DRAM threat hits chip giants

KOSPI closed down 5.46% at 6,035 as foreigners net sold about ₩4.5 trillion, after China's CXMT announced next-generation server DRAM and global chip stocks weakened; the end of Samsung Electronics' buyback also removed a source of demand. SK hynix closed down 10.09% and Samsung Electronics down 7.39%, while LG Energy Solution rose 3.02%.123456789101112

Directly affected

Next in line

Further out

APR plunges about 20% on earnings downgrades

APR closed down 19.6% after brokerages including Daol Investment & Securities and SK Securities cut target prices on profitability concerns tied to its European expansion. Kyobo Securities said FX is a burden but expects a stronger fourth-quarter main season.1234567

Further out

Shinhan Financial to acquire 77% of Lotte Non-Life Insurance for ₩693.3B

Shinhan Financial agreed to buy a 77.04% stake in Lotte Non-Life Insurance from JKL Partners for ₩693.3 billion, with plans to acquire the remaining 22.96% later. Lotte Non-Life rose 7.94% at close, while Shinhan Financial fell 0.8%.123456

Directly affected

Next in line

Hyundai Motor's domestic hybrid sales fall while EVs surge 75%

Chosun Biz reported Hyundai's hybrid push posted its first domestic year-on-year decline while electric vehicle sales rose 75%. Hyundai Motor closed down 1.56%, and Yuanta Securities said FX rather than earnings is the near-term risk.12

Directly affected

Next in line

Further out

The market

KOSPI fell 5.5% to 6,035.35, KOSDAQ 1.4% to 837.03 and KOSPI 200 6.3% to 942.07. Decliners (1,881) far outnumbered advancers (669), with 212 unchanged. Trading value was about ₩35.7 trillion versus a recent average of about ₩29.2 trillion. Foreigners net sold about ₩4.6 trillion on KOSPI and bought about ₩135.2 billion on KOSDAQ. Sources said the won weakened on foreign outflows; USD/KRW was 1,335.8 in the data. KTB 3-year yield was 3.857 and the US 10-year 5.21. The S&P 500 was little changed (-0.0%), Nasdaq 100 ETF -0.3%, US chips ETF -0.2%, and Nikkei 225 -1.8%. Brent was 105.69 (-0.9%).

KOSPIDaily closes · shaded: this wrap6,035.35
6,5007,000
Aug 31Sep 11Sep 28Oct 13
KOSDAQDaily closes · shaded: this wrap837.03
800850900
Aug 31Sep 11Sep 28Oct 13

669 stocks rose, 1,881 fell · trading value ₩36T

USD/KRW1,335.8−0.2%
KTB 3y3.86-6bp
UST 10y5.21-3bp
S&P 5007,805.450.0%
Nasdaq 100 (QQQ ETF)−0.3%
US chips (SOXX ETF)−0.2%
Nikkei 22567,777.52−1.8%
Brent oil105.69−0.9%
Gold4,177.3−0.3%
Copper (CPER ETF)−0.4%

Themes investors follow

HBM & AI chips fell 2.8% on average, foundry & chip design 2.9%, and semiconductor equipment & materials 1.2%. On-device AI fell 5.3%, glass substrates 3.1%, and robots 2.7%, with Samsung Electronics weighing on the last. K-beauty fell 2.6% and aesthetics 3.4%, led by APR. Obesity drugs fell 3.2%. Gainers within chips included Systems Technology (+9.8%), PSK Holdings (+7.2%) and SFA Semicon (+4.4%). Cybersecurity was nearly flat (-0.1%), but Ahnlab rose 10.5% and RaonSecure 6.1%; a source tied this to hopes for security spending after AI-driven hacking incidents at financial firms. Power-related names such as Samwha Electric (+15.8%) and Gaon Cable (+4.9%) rose with no clear reason reported. Defense fell 1.7% and shipbuilding 1.1%.

Popular themes

Best themes

  • Ageing & low birth rate+0.9%Corentec +4.5% · Agabang&Company +3.5% · Dentium +1.8%
  • Lithium & rare metals+0.7%Hydro Lithium +4.6% · POSCO International +3.3% · Daejoo Electronic Materials +2.7%
  • Pet care+0.5%Kbio Labs +5.5% · Hyundai Feed 0.0% · Harim Holdings −0.4%
  • Banks0.0%JB Financial Group +1.3% · KakaoBank +1.0% · BNK Financial Group +0.5%
  • Zinc & non-ferrous metals−0.1%Daiyang Metal +19.8% · Namsun Aluminium +0.1% · Korea Zinc −0.1%
  • Tires−0.1%Kumho HT +5.7% · Nexen Tire +1.9% · DYP +0.6%

Worst themes

  • On-device AI−5.3%Lumens Bios −19.7% · Samsung Electro-Mechanics −8.3% · Jeju Semiconductor −7.4%
  • Aesthetics & botox−3.4%APR −19.6% · RecensMedical −8.4% · PharmaResearch −8.1%
  • Obesity drugs−3.2%G2GBIO −11.6% · Peptron −7.4% · D&D Pharmatech −6.4%
  • Glass substrates−3.1%Samsung Electro-Mechanics −8.3% · Samsung Electro-Mechanics Pref. −6.9% · GO Element −3.6%
  • Foundry & chip design−2.9%Iron Device −11.8% · SK hynix −10.1% · Dongwoon Anatech −8.5%
  • HBM & AI chips−2.8%Hmnex −14.7% · SK Square −12.9% · Jntc −11.7%

The biggest companies

Samsung Electronics fell 7.4% and SK hynix 10.1%; sources cited CXMT competition fears and a supply gap after buybacks. SK Square fell 12.9%, and a source said it fell about twice as much as Hynix. Samsung Electro-Mechanics fell 8.3%, Samsung Life 4.3% and Samsung C&T 4.6%. LG Energy Solution rose 3.0%, with sources noting its sodium-ion battery expansion into North American ESS and a raised target price. Hyundai Motor fell 1.6%; Yuanta said FX rather than earnings is the near-term risk. KB Financial fell 0.3%, Shinhan Financial 0.8%, Samsung Biologics rose 0.4%, Kia 0.2%, Samsung SDI fell 0.2%, Doosan Enerbility 1.8% and Hanwha Aerospace 2.7%.

Who was buying and selling

Foreigners net sold SK hynix by about ₩2.4 trillion and Samsung Electronics by about ₩1.4 trillion, plus Samsung Electro-Mechanics (about ₩196.8 billion) and SK Square (about ₩177.4 billion). Their top buys were VM (about ₩36.8 billion), HD Hyundai Heavy Industries (about ₩30.6 billion) and Silicon 2 (about ₩23.5 billion). Institutions bought SK hynix (about ₩613.7 billion), Samsung Electronics (about ₩239.7 billion) and LG Energy Solution (about ₩91.0 billion). Retail bought Samsung Electronics (about ₩1.2 trillion), SK hynix (about ₩1.2 trillion) and SK Square (about ₩210.3 billion). Pension funds bought LG Energy Solution (about ₩55.3 billion) and sold SK Square (about ₩53.6 billion). A source said margin debt passed ₩34 trillion.

Foreign investors

Net bought

  1. 1VM+₩37B−1.6%
  2. 2HD Hyundai Heavy Industries+₩31B+0.3%
  3. 3Silicon 2+₩23B−6.7%
  4. 4Alteogen+₩20B−3.0%
  5. 5PharmaResearch+₩18B−8.1%
  6. 6Samwha Capacitor+₩17B−4.9%
  7. 7Mirae Asset Securities+₩16B−3.5%
  8. 8Lotte Shopping+₩15B−3.9%
  9. 9Hyundai Engineering & Construction+₩14B−2.0%
  10. 10Fadu+₩13B−7.2%
  11. 11Hanmi Pharm+₩12B−4.5%
  12. 12KEPCO Engineering & Construction+₩12B−3.1%
  13. 13Hyundai Mobis+₩12B−1.7%
  14. 14HD Construction Equipment+₩9.8B−1.6%
  15. 15Korea Aerospace Industries+₩9.5B−2.9%

Net sold

  1. 1SK hynix−₩2.4T−10.1%
  2. 2Samsung Electronics−₩1.4T−7.4%
  3. 3Samsung Electro-Mechanics−₩197B−8.3%
  4. 4SK Square−₩177B−12.9%
  5. 5Samsung Electronics Pref.−₩150B−6.7%
  6. 6Samsung SDI−₩85B−0.2%
  7. 7LG Energy Solution−₩74B+3.0%
  8. 8APR−₩33B−19.6%
  9. 9KB Financial Group−₩30B−0.3%
  10. 10SK−₩30B−7.4%
  11. 11DB Insurance−₩27B+0.9%
  12. 12Hanmi Semiconductor−₩27B−7.9%
  13. 13POSCO Holdings−₩26B0.0%
  14. 14Hyundai Motor−₩22B−1.6%
  15. 15HPSP−₩21B+1.0%

Institutions

Net bought

  1. 1SK hynix+₩614B−10.1%
  2. 2Samsung Electronics+₩240B−7.4%
  3. 3LG Energy Solution+₩91B+3.0%
  4. 4Hyundai Motor+₩46B−1.6%
  5. 5KB Financial Group+₩37B−0.3%
  6. 6Samsung Electronics Pref.+₩36B−6.7%
  7. 7Samsung SDI+₩30B−0.2%
  8. 8DB Insurance+₩28B+0.9%
  9. 9SK+₩28B−7.4%
  10. 10SK Innovation+₩28B+2.6%
  11. 11Hyundai Mobis+₩25B−1.7%
  12. 12Samsung Electro-Mechanics+₩24B−8.3%
  13. 13Pan Ocean+₩24B+1.6%
  14. 14POSCO Holdings+₩23B0.0%
  15. 15Meritz Financial Group+₩20B+2.2%

Net sold

  1. 1APR−₩54B−19.6%
  2. 2SK Square−₩45B−12.9%
  3. 3VM−₩41B−1.6%
  4. 4Silicon 2−₩32B−6.7%
  5. 5Simmtech−₩26B−2.8%
  6. 6PharmaResearch−₩24B−8.1%
  7. 7Hanwha Engine−₩20B−3.9%
  8. 8Samwha Capacitor−₩14B−4.9%
  9. 9Robotis−₩12B−2.5%
  10. 10Doosan−₩11B−4.8%
  11. 11Kolmar Korea−₩9.2B−7.7%
  12. 12Mirae Asset Securities−₩8.7B−3.5%
  13. 13HD Construction Equipment−₩8.5B−1.6%
  14. 14Tokai Carbon Korea−₩8B−5.5%
  15. 15POSCO Future M−₩7.9B+0.1%

Retail investors

Net bought

  1. 1Samsung Electronics+₩1.2T−7.4%
  2. 2SK hynix+₩1.2T−10.1%
  3. 3SK Square+₩210B−12.9%
  4. 4Samsung Electro-Mechanics+₩167B−8.3%
  5. 5Samsung Electronics Pref.+₩95B−6.7%
  6. 6APR+₩85B−19.6%
  7. 7Samsung SDI+₩51B−0.2%
  8. 8Hanmi Semiconductor+₩26B−7.9%
  9. 9L&C Bio+₩20B+2.3%
  10. 10Simmtech+₩19B−2.8%
  11. 11Hyosung Heavy Industries+₩13B−4.0%
  12. 12LG Electronics+₩12B−3.6%
  13. 13Hanwha Engine+₩12B−3.9%
  14. 14Ecopro BM+₩11B−2.1%
  15. 15Jusung Engineering+₩11B+3.6%

Net sold

  1. 1HD Hyundai Heavy Industries−₩43B+0.3%
  2. 2Hyundai Mobis−₩37B−1.7%
  3. 3Alteogen−₩27B−3.0%
  4. 4HYBE−₩25B+4.4%
  5. 5Celltrion−₩23B−0.4%
  6. 6Hyundai Motor−₩23B−1.6%
  7. 7LG Energy Solution−₩18B+3.0%
  8. 8NAVER−₩18B−1.4%
  9. 9SK Innovation−₩18B+2.6%
  10. 10Kctech−₩17B+3.6%
  11. 11Korea Aerospace Industries−₩16B−2.9%
  12. 12Hanwha Ocean−₩16B−0.3%
  13. 13HMM−₩16B+1.2%
  14. 14Korean Air Lines−₩15B−1.9%
  15. 15Korea Electric Power−₩15B+2.1%

Pension funds

Net bought

  1. 1LG Energy Solution+₩55B+3.0%
  2. 2Samsung Electronics+₩28B−7.4%
  3. 3SK hynix+₩27B−10.1%
  4. 4Pan Ocean+₩21B+1.6%
  5. 5SK Innovation+₩18B+2.6%
  6. 6Sanil Electric+₩14B−1.6%
  7. 7Samsung SDI+₩9.9B−0.2%
  8. 8Hyundai Mobis+₩7.9B−1.7%
  9. 9DB Insurance+₩7.4B+0.9%
  10. 10Samsung Electronics Pref.+₩7.4B−6.7%
  11. 11OliX Pharmaceuticals+₩7.2B−14.3%
  12. 12KIWOOM Securities+₩6.9B−3.4%
  13. 13Korean Air Lines+₩6.5B−1.9%
  14. 14POSCO International+₩6.3B+3.3%
  15. 15LG Chem+₩6B+0.6%

Net sold

  1. 1SK Square−₩54B−12.9%
  2. 2Hanmi Semiconductor−₩18B−7.9%
  3. 3SK−₩14B−7.4%
  4. 4KIA−₩12B+0.2%
  5. 5Mirae Asset Securities−₩10B−3.5%
  6. 6APR−₩9.1B−19.6%
  7. 7Korea Investment Holdings−₩8.2B−2.4%
  8. 8Hyosung Heavy Industries−₩7.9B−4.0%
  9. 9LIG Defense&Aerospace−₩7.8B−5.0%
  10. 10HD Construction Equipment−₩7.5B−1.6%
  11. 11DN Automotive−₩7.2B+1.0%
  12. 12HD Hyundai Electric−₩6.7B−3.8%
  13. 13Hyundai Motor−₩6.4B−1.6%
  14. 14Wonik IPS−₩6.3B−0.4%
  15. 15LG−₩6.2B−1.9%

ETFs

Semiconductor ETFs fell most: KODEX US AI Optical Communication Network -9.2%, KODEX AI Semiconductor TOP2 Plus -8.9%, 1Q K Semiconductor TOP2+ -8.8% and HANARO Fn K-Semiconductor -8.5%. TIGER 200 IT fell 8.2%. The best were KODEX US S&P500 Energy (Synthetic) +2.6%, KODEX India Nifty50 +2.2% and TIGER KTB 30Y STRIPS Active +1.9%, with US dividend and energy funds also up, showing money in non-chip and overseas assets.

Best ETFs

Worst ETFs

Leveraged and inverse ETFs are left out; moves are the daily moves compounded.

How our signals did

No Squeeze! setups were open. Of 40 technical events since 2026-09-13, 9 worked. Recent signals such as The Codi (goldenLong) and Kctech (high52) were negative. Short squeeze scores were highest for Meritz Financial Group (60), KMW (58), ISU Specialty Chemical (55), Doosan Robotics (55, up from 47) and PearlAbyss (54, up from 49). No pair trades were flagged.

Notable technical signals

40 notable signals: 9 moved the way they pointed so far.

Highest short squeeze scores

Signals since Sep 13. Signals describe past prices. Results run from the signal to the latest close; they are not recommendations.

Written by AI from JONBUR's data and checked against those figures. Reasons come only from the linked news, filings and broker reports for that day; when none gives a reason, we say so. Index moves marked est. are our estimate from closing prices until the official index is available. Not financial advice.

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