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Daily briefing · 2026-10-28 (Wed)

KOSPI Up 3% at 5638 Samsung GOS Fine 20.1B

KOSPI closed up 3.09% at 5638.34.

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★ Must-read

Today's must-read · 7 stories

01

KOSPI Rises 168.88 Points to Close at 5638.34, Up 3.09%

On the 27th, KOSPI closed up 3.09% from the previous session at 5638.34, according to both News1 and Newspim closing reports. KOSDAQ closed up 2.29%. KOSPI opened up 189.18 points at 5658.65.

02

OpenAI Says Its Model Disproved ETH and Proved Local Smoothing Conjecture

OpenAI said its model disproved the Exponential Time Hypothesis (ETH) and proved the local smoothing conjecture in all dimensions. Al Jazeera reported OpenAI's announcement of discoveries in mathematics, computer science and physics. A physics review group delayed releasing the materials.

03

Anthropic Discloses AI Model Security Incident in IPO Filing

According to Fox News' live blog, Anthropic disclosed in its IPO filing that during a cybersecurity evaluation, four models were connected to the internet through a partner's misconfiguration and reached external systems. It delayed pretraining of a new model by more than a month to strengthen weight protection.

04

Russia Strikes Kyiv Overnight; Local Ceasefire Takes Effect in Oleshky

Kyiv authorities said Russia hit a southern bridge with 16 ballistic missiles and about 280 drones. Russia's Defense Ministry claimed it targeted transport infrastructure and military-use facilities. Ukraine's human rights ombudsman said the US-brokered local ceasefire began at 3 a.m. on the 27th.

05

Iran Demands Sanctions Relief and End of Port Blockade to Reopen Hormuz

Al Jazeera reported Iran is demanding sanctions relief, an end to the US port blockade and guarantees against renewed attacks. The US reportedly wants further nuclear concessions first. China said it plans to send an envoy.

06

Democratic Party Decides to Prioritize Parliamentary Probe of Chief Justice Cho

At a caucus meeting on the 27th, the Democratic Party decided to pursue a parliamentary investigation of Chief Justice Cho Hee-de first. Hankyung reported it plans to handle the investigation plan at the plenary session on the 5th of next month. PPP floor leader Jeong Jeom-sik vowed to counter with all available means.

07

KFTC Fines Samsung Electronics 20.1 Billion Won Over GOS Advertising

The KFTC issued a corrective order and a provisional fine of 20.114 billion won, saying Samsung did not disclose GOS performance limits in game-performance ads for the Galaxy S21, S22 and Tab S8. Samsung signaled legal action, including an administrative lawsuit.

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02Politics & society

Politics & society

The Democratic Party decided to prioritize a parliamentary probe of the chief justice, and the PPP strongly objected
Democratic Party Decides to Prioritize Probe of Chief Justice Cho

At a caucus meeting on the 27th, the Democratic Party chose to pursue a parliamentary investigation first, rather than the impeachment hardliners urged. Hankyung said it plans to handle the plan at the plenary on the 5th of next month.

PPP Vows to Counter Chief Justice Probe With All Means

PPP floor leader Jeong Jeom-sik called the probe suppression of the judiciary and a violation of separation of powers, vowing to counter with all means. Leader Jang Dong-hyuk claimed on Facebook it was a build-up to impeachment.

Large Fire at Seoul's Guryong Village, No Confirmed Casualties

Fire authorities said no casualties had been confirmed so far in the Guryong Village fire in Gangnam, Seoul. Kyunghyang reported 39 residents evacuated on their own and six helicopters were deployed.

Welfare Committee Audit Clashes Over National Pension Rebalancing Deferral

At the Health and Welfare Committee audit, Rep. Kim Tae-ho demanded release of minutes on the pension rebalancing deferral. Minister Jung Eun-kyeong said it was not a realized loss and the minutes must remain private, Ajunews reported.

KFTC Fines Samsung Electronics 20.1 Billion Won Over GOS Ads

The KFTC issued a corrective order and a provisional fine of 20.114 billion won, saying GOS performance limits were not disclosed in game-performance ads. Samsung signaled legal action including an administrative suit.

LIG D&A Two-Year Bidding Ban Start Pushed to Nov. 20

The start date of the two-year bidding ban the Defense Acquisition Program Administration imposed over bribery allegations moved from Oct. 29 to Nov. 20. A suspension hearing is set for Nov. 5.

03Economy & finance

Economy & finance

KOSPI closed up more than 3% at 5638.34, and the won-dollar rate was reported lower
KOSPI Up 3.09% at 5638.34, KOSDAQ Up 2.29%

On the 27th, KOSPI closed up 3.09% at 5638.34 and KOSDAQ rose 2.29%, according to News1 and Newspim closing reports.

Won-Dollar Rate Falls, Reported in the 1,320s on the 27th

Newsis reported KOSPI rose and the won-dollar rate fell. Steel & Metal News cited 1,323.70 won and Job Post 1,325.30 won, so the basis differs by outlet.

KOSPI Up 3.09% to Close at 5638.34

On the 27th, KOSPI closed around 5638.35, up 168.88 points (3.09%) from the previous session, per News1 and Newspim closing headlines.

KOSDAQ Closes Up 2.29%, Rising Alongside KOSPI

KOSDAQ closed up 2.29% on the 27th, while KOSPI rose 3.09% to 5638.34, per a News1 closing report headline.

04Business & industry

Business & industry

Indian healthcare and US AI and security startups announced Series A rounds in quick succession
SK hynix Reports Earnings on the 28th; 76 Trillion Won Operating Profit Forecast Reported

Per KBC and Herald headlines, SK hynix reports on the 28th. A 76 trillion won operating profit forecast emerged, but with the stock down 30%, attention reportedly centers on shareholder returns.

Hyundai Motor India Seeks Rebound With Pune Plant and New Models

MyDaily reported that Hyundai Motor India, whose products sell well but whose stock has slipped, aims to rebound with its Pune plant and new models.

Avante Raises $30 Million Series A

AI benefits platform Avante raised $30 million led by Frist Cressey Ventures. Sorenson Capital and others joined as new investors, bringing total funding to $40 million.

Cent Raises $15 Million Series A and Acquires Medsee

Indian preventive healthcare startup Cent raised $15 million co-led by Blume Ventures and South Park Commons. It also acquired AI radiology platform Medsee.

Overwatch Data Raises $15 Million Series A

AI-based threat intelligence firm Overwatch Data raised $15 million led by Mouro Capital. Visa Ventures and Capital One Ventures joined as strategic investors.

05AI & tech

AI & tech

OpenAI announced math and physics discoveries, and Anthropic disclosed an AI security incident in its IPO filing
OpenAI Announces AI Math and Physics Discoveries Including ETH Disproof

OpenAI said its model disproved the Exponential Time Hypothesis (ETH) and proved the local smoothing conjecture in all dimensions. A physics review group delayed releasing the materials.

Anthropic Discloses AI Model Security Incident in IPO Filing

During a cybersecurity evaluation, four models were connected to the internet through a partner's misconfiguration and reached external systems. A new model's pretraining was delayed by over a month to strengthen weight protection.

Nvidia Announces $3 Billion Investment in Meta

Nvidia will expand collaboration with Meta on its Muse AI model and AI agents. Meta plans to increase its use of Vera Rubin computing infrastructure and Vera CPUs.

OpenAI Releases GPT-6.1 Terra, Standard API Price Cut 50%

OpenAI released GPT-6.1 Terra, focused on computer use and visual reasoning. Its standard API price is 50% lower than GPT-5.6 Terra and it is available to paid ChatGPT subscribers.

Emergency Inspection of 555 Financial Firms Finds 130 With Weak Security

Financial authorities inspected 555 firms on an emergency basis and found problems at 130. About 100,000 records leaked from 16 firms, and six related bills are pending at the National Assembly Political Affairs Committee.

Netflix Dismisses Senior Executives Including CCO Bela Bajaria

Asia Economy, citing Bloomberg and the LA Times, reported Netflix dismissed CCO Bela Bajaria and film chief Dan Lin, among others. This month it also cut about 6% of its workforce.

06World & security

World & security

A local ceasefire took effect in Oleshky amid a major Russian strike on Kyiv, and Iran set Hormuz conditions
Iran's President Calls US Sanctions Economic Terrorism at GECF

At the 8th Gas Exporting Countries Forum summit in Moscow, President Masoud Pezeshkian called unilateral sanctions and sea and air blockades economic terrorism, per Iran's state Press TV (Iran's claim).

Finnish and Norwegian Leaders Hold Calls With Putin

Both governments said Finnish President Stubb and Norwegian PM Hoere spoke with Putin. Al Jazeera reported Kyiv and Moscow agreed to hold US-brokered technical talks in Abu Dhabi in early November.

Russia Hits Southern Bridge in Overnight Kyiv Strike

Kyiv authorities said Russia hit a southern bridge with 16 ballistic missiles and about 280 drones. Russia's Defense Ministry claimed it targeted transport infrastructure and military-use facilities.

Humanitarian Local Ceasefire Takes Effect in Oleshky, Kherson

Ukraine's human rights ombudsman said the US-brokered ceasefire began at 3 a.m. on the 27th. Russia's Defense Ministry said it halted fire toward Kherson, and both sides confirmed the ceasefire.

Iran Demands Sanctions Relief as Condition to Reopen Hormuz

Al Jazeera reported Iran demands sanctions relief, an end to the US port blockade and guarantees against renewed attacks, while the US wants further nuclear concessions first. China said it will send an envoy.

07Science & health

Science & health

A large early-universe simulation and an ancient eclipse record were used in cosmology and Earth-rotation research
Lumina Large Simulation Recreates First 2 Billion Years of the Universe

Researchers at the Harvard-Smithsonian Center for Astrophysics unveiled Lumina, using over 15,000 GPUs on Frontier across a volume about 1.5 billion light-years on a side. The paper appeared in MNRAS.

709 BC Chinese Eclipse Record Used in Earth Rotation Research

Nagoya University's Hisashi Hayakawa and team said Qufu's coordinates in the Spring and Autumn Annals' total eclipse record were off by about 8 km. They re-estimated rotation using the corrected location. The paper appeared in ApJL.

Samsung Bioepis Presents Phase 1 Results for Keytruda Biosimilar SB27 at ESMO

In a Phase 1 trial of 163 non-small cell lung cancer patients, pharmacokinetic equivalence to original Keytruda was confirmed on the primary endpoint AUC, with similar efficacy and safety, it said.

HLB Elevar Presents Rivoceranib Phase 2 Follow-up at ESMO

The rivoceranib thymic epithelial tumor Phase 2 showed ORR 35%, DCR 85% and mPFS 11.8 months at median follow-up of 13.6 months. Bile duct cancer drug Rivfitu received FDA approval on the 23rd of last month.

08Energy & environment

Energy & environment

The WMO annual bulletin reported record greenhouse gas concentrations
WMO Bulletin: CO2 at 426.8 ppm, Highest Since Records Began

In the WMO bulletin, 2025 CO2 was 426.8 ppm, methane 1,948 ppb and nitrous oxide 339.1 ppb, all records. The annual CO2 rise was 2.8 ppm, below the prior year's 3.5 ppm.

Korea's Background CO2 at 432.7 ppm, 5.9 ppm Above Global Average

KMA readings at Anmyeondo, Jeju Gosan and Ulleungdo showed CO2 at 432.7 ppm and methane at 2,023 ppb. KMA said the gap does not mean domestic emissions are high.

Oxfam: Top 0.1% Emit More Carbon Than Bottom 44%

Ahead of COP31, Oxfam released its report on disaster inequality. It said the top 0.1% (about 8 million people) emit more CO2 than the bottom 44% (3.5 billion people).

European Commission Proposes European Climate Resilience Act

The Commission proposed a European Climate Resilience Act. It also set out plans for an initiative to identify the 100 most vulnerable regions, a European heat plan and a climate insurance alliance.

WTI Closes at $101.76, Brent at $115.81, Down 0.78%

At the New York close on the 26th, December WTI fell $1.51 (1.46%) to $101.76 and December Brent fell $0.91 (0.78%) to $115.81. Etoday said prices fell on the Iran-Saudi meeting.

Saudi, Pakistan, Turkey Hold Four-Nation Tehran Talks, Cited in Oil Price Report

Per Infostock Daily, Saudi Arabia's defense minister visited Tehran with Pakistani and Turkish representatives for four-nation high-level talks on easing tensions. The same report covered the oil price decline.

09Culture & sports

Culture & sports

Chiikawa The Movie kept the box office top spot on the 26th with 20,151 admissions
Chiikawa The Movie Stays No. 1 on the 26th With 20,151 Admissions

Per TopStarNews, Chiikawa The Movie: Secret of Mermaid Island stayed first on the 26th with 20,151 daily admissions and 2,268,277 cumulative. Second was Assassin(s) with 7,619.

Total Theater Admissions 73,174 on the 26th, Down 73.1% From Prior Day

Total theater admissions on the 26th were 73,174, down 73.1% from the day before. Revenue share by origin was Korean films 43.0%, Japanese 33.0% and American 20.6%.

Brewers Rout Rays 10-1 in WS Game 3, Lead Series 3-0

In World Series Game 3 in St. Petersburg on the 26th, Milwaukee beat Tampa Bay 10-1. The Brewers scored eight runs in the fifth inning and lead the series 3-0.

⌚ Watch ahead

Looking ahead

What to watch ahead

  • SK hynix Q3 earnings release on the 28th
  • Russia-Africa Summit in Moscow, 28th-29th
  • Swiss foreign minister to visit North Korea 29th-30th, to attend opening of Pyongyang office
  • LIG D&A bidding ban: suspension hearing set for Nov. 5
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