Korea Today.zip Nov 5: KOSPI Plunges 5% and Triggers a Sell-Side Sidecar

Korea Daily Brief
By BriefZip Editorial
Korea Today.zip November 5 2026 thumbnail

South Korean stocks had a sharp sell-off on Thursday, November 5. The KOSPI closed at 5,383.80, down 5.28%, and the KOSDAQ fell 5.11% to 678.41. Sell-side sidecars were triggered on both markets during the session. The same day brought news from Hanwha Aerospace, Samsung Biologics and Kakao.

Korea Today.zip November 5 2026 cover with five headlines

KOSPI: a 5% drop and a sidecar

KOSPI down 5.28 percent and sell-side sidecar triggered

The KOSPI lost 300.00 points to close at 5,383.80. A day earlier it had finished at 5,683.80 after swinging by more than 400 points, and it gave up that gain and ended below the November 3 close. Compared with the November 3 close of 5,648.79 the index is 4.69% lower, and against the October 29 close of 5,937.66 it is down about 9.3%.

Many market commentators tie the drop to the US midterm elections. Democrats won both the House and the Senate, and investors worried that a Democratic Congress and several newly elected governors could tighten rules on AI data centers. One report said 34 of the 36 governor candidates who won or led in their races back at least one data center restriction. Korea's market has a heavy weighting in AI chipmakers such as Samsung Electronics and SK hynix, which helps explain why the reaction was larger than elsewhere. This is a market interpretation and not a confirmed single cause.

A sell-side sidecar is a circuit breaker for program trading. It suspends program sell orders for five minutes when KOSPI 200 futures stay down at least 5% for at least one minute.

KOSDAQ: first sidecar since October 15

KOSDAQ down 5.11 percent and sell-side sidecar triggered

The KOSDAQ closed at 678.41, down 36.54 points. Its sell-side sidecar needs KOSDAQ 150 futures to fall at least 6% and the KOSDAQ 150 index to fall at least 3% at the same time for at least one minute, and this was the first one since October 15. Semiconductor equipment makers led the declines. With both markets hit on the same day, the move looked like broad risk reduction rather than a problem in one sector.

Hanwha Aerospace breaks ground in Poland

Hanwha Aerospace starts first overseas guided missile plant in Poland

Hanwha Aerospace held a groundbreaking ceremony on November 4, local time, for a guided missile plant in Gorzow Wielkopolski, Poland, and announced it on November 5. The plant will produce the CGR-080, an 80 km class missile for the Polish version of the Chunmoo launcher known as Homar-K. It is the company's first guided missile production site abroad. The plant follows a supply contract worth about 5.6 trillion won signed with Poland's Armament Agency last December. Completion is targeted for 2028, first production for late 2029 and mass production from 2030. Hanwha Aerospace shares closed down 7.48% at 680,000 won. The logo shown is the Hanwha Group logo.

Samsung Biologics wins 97.98% in its tender offer

Samsung Biologics tender offer for PolyPeptide draws 97.98 percent

Samsung Biologics said 32,350,302 shares, or 97.98% of the target shares, were tendered in its offer for PolyPeptide Group, a global contract developer and manufacturer of peptides. That clears both the 66.7% minimum needed for the deal and the 90% level that allows the buyer to squeeze out the remaining holders. The agreed price is 1.46 billion Swiss francs, about 2.37 trillion won. Peptides are a core ingredient of GLP-1 obesity and diabetes drugs, so the deal extends Samsung Biologics beyond antibodies, mRNA and antibody-drug conjugates. Payment is due within 10 trading days after regulatory approvals in Europe, India, Australia and Brazil. Its shares closed up 1.67%.

Kakao pushes back its spin-off by a month

Kakao delays its spin-off and merger by one month

Kakao moved the effective date of its personnel-based spin-off from January 1 to February 1 of next year. It said the relisting review needs more time, so it shifted the main dates by about a month. The extraordinary shareholders meeting is set for January 15 and relisting for February 25. The absorption of Kakao Investment also moves to February 1. Kakao shares closed up 10.65% at 32,200 won, and its third-quarter results and a share cancellation decision came out the same day.

What to watch next

When an index falls this hard, company news can still move stocks in the opposite direction, as the gains at Samsung Biologics and Kakao showed. Next, watch whether another sidecar appears, how the discussion on US AI data center rules develops, and whether Kakao confirms its new timetable.

Sources: Korea Exchange, Hanwha Aerospace, Samsung Biologics, Kakao

Comments

Post a Comment

Popular posts from this blog

Korea Today.zip Nov 4: KOSPI Recovers From a 4% Intraday Drop as Coupang Posts a Loss

Korea Today.zip Nov 4: KOSPI Recovers From a 4% Intraday Drop as Coupang Posts a Loss
South Korea's stock market took buyers on a wild ride on Wednesday, November 4, 2026. The benchmark KOSPI index slid as much as about 4% during the session, then turned around in the afternoon to close 0.62% higher at 5,683.80. The same day, e-commerce company Coupang reported a third-quarter operating loss despite higher sales, Hyundai Motor Group showed a new building block for large hydrogen plants, and a consumer dispute panel ordered Mercedes-Benz Korea to compensate electric-car buyers who were misled about their batteries. This briefing walks through each story, explains the numbers and terms, and ends with what to watch next. Won amounts are converted at about 1,341.5 won per dollar, the Seoul market reference rate at 3:30 p.m. on November 4, unless another rate is noted. Stocks: a 400-point swing in one day The KOSPI, which tracks the stocks listed on the main board of the Korea Exchange, closed up 35.01 points, or 0.62%, at 5,683.80. The KOSDAQ, Korea's market ...
Read more

Korea Today.zip Nov 6: KOSPI Trips a Circuit Breaker and Closes Down 6%

Korea Today.zip Nov 6: KOSPI Trips a Circuit Breaker and Closes Down 6%
South Korean stocks suffered a second straight heavy loss on Friday, November 6. The KOSPI fell more than 8% early in the session, which triggered a market-wide circuit breaker, and it closed at 5,050.29, down 6.19%. The KOSDAQ dropped 5.04% to 644.25. The government responded the same morning by suspending a margin loan rule to slow forced selling, a court paused part of Coupang's record privacy fine, and Hankook Tire reported third-quarter results. Dollar figures below use 1,357 won per dollar, Woori Bank's November 6 reference rate. KOSPI: a 20-minute halt and a 6% drop The KOSPI is the main index of the Korea Exchange's main board. It opened 2.24% lower at 5,263.26 and kept sliding. At 9:03 a.m. it had stayed more than 8% below the previous close for one minute, so a first-stage circuit breaker stopped all trading for 20 minutes. After trading resumed, the slide continued and a sell-side sidecar, which pauses program sell orders for five minutes, was triggered at 9...
Read more

US Today.zip Nov 2: Oil Slides 7%, Dow Edges Up as Nasdaq Falls 1%

US Today.zip Nov 2: Oil Slides 7%, Dow Edges Up as Nasdaq Falls 1%
Wall Street split on Monday, Nov. 2. Crude oil fell more than 7% intraday on hopes for a US-Iran diplomatic breakthrough, while the Dow rose 0.41%, while the tech-heavy Nasdaq Composite slid 1.07%. Factory data came in strong, and two big corporate deals landed in the chip and cloud space. Stocks and oil The Dow closed at 51,983.98, up 213.67 points. The S&P 500 fell 0.51% to 7,541.40, and the Nasdaq dropped 272.68 points to 25,164.32. Market commentary described the day as a rotation out of technology stocks. The three benchmarks do not hold the same mix of companies. The Dow follows 30 large blue-chip businesses and is price-weighted, so a company's share price affects its influence. The Nasdaq Composite has a particularly large technology presence, while the S&P 500 covers a broader group of large US companies. A rise in the Dow alongside a decline in the other two is therefore not a contradiction: it shows that the day's gains and losses were distributed uneve...
Read more

Marvell Agrees to Buy Lumentum in All-Stock Deal at $115 Billion Enterprise Value

Marvell Agrees to Buy Lumentum in All-Stock Deal at $115 Billion Enterprise Value
Marvell Technology agreed on Nov. 2 to acquire Lumentum in an all-stock deal valued at about $115 billion in enterprise value. No cash changes hands: Lumentum holders receive Marvell shares. The deal is expected to close in the first half of 2028. Why Marvell wants Lumentum Marvell designs chips that move electrical signals between processors and servers inside data centers, along with custom AI chips. Lumentum makes lasers, optical transceivers and optical circuit switches that send data as light. The companies said copper links are hitting speed and power limits as AI data centers grow, accelerating the shift to optical connections. Optical transceiver: a part that turns electrical signals into light for fiber links, and back again on the other end. The strategic point is that faster processors are useful only when the rest of the system can keep them supplied with data. Electrical chips, network equipment and optical components perform different jobs along that path. Marvell i...
Read more

US Today.zip Nov 3: Chip Rebound Lifts Nasdaq as Apple Drags the Dow

US Today.zip Nov 3: Chip Rebound Lifts Nasdaq as Apple Drags the Dow
Wall Street split again on Tuesday, November 3, 2026, as Americans voted in the midterm elections. A rebound in chip stocks lifted the Nasdaq Composite 0.83% , while the Dow Jones Industrial Average slipped 0.38% as Apple fell. September job openings came in above expectations, Apple's record quarter was overshadowed by a softer margin outlook, and Palantir reported that revenue nearly doubled from a year earlier. This briefing walks through the market close, the jobs data and the two company reports, with the numbers explained and what to watch next. Stocks: chips bounce back on Election Day The Nasdaq Composite closed at 25,372.01, up 207.65 points. The S&P 500 gained 27.52 points, or 0.36%, to 7,568.92. The Dow fell 197.26 points, or 0.38%, to 51,786.72. Chip stocks had sold off hard the previous session, and many of them recovered on Tuesday. Because the Nasdaq Composite is heavily weighted toward technology companies, it tends to move most when semiconductors and so...
Read more

Korea Today.zip Nov 3: KOSPI Falls 3.59%, IPO Cornerstone Rules Set for Nov. 13

Korea Today.zip Nov 3: KOSPI Falls 3.59%, IPO Cornerstone Rules Set for Nov. 13
South Korean stocks had a rough Tuesday. The benchmark KOSPI fell 3.59% on Nov. 3, and the tech-heavy KOSDAQ dropped 4.08%. On the same day, the government finalized the details of a new rule that lets long-term institutional investors receive IPO shares in advance, Kia announced a plan to supply electric vans to a major Japanese taxi operator, and the navy launched a new 3,600-ton submarine built with 70 domestically made systems. Here is what happened and why it matters. Stocks: a broad sell-off The KOSPI, which tracks large companies listed on the Korea Exchange's main board, closed at 5,648.79, down 210.29 points. The KOSDAQ, Korea's smaller market dominated by technology and biotech growth companies, closed at 704.39, down 29.97 points or 4.08%. Both indexes stayed weak through the session. Market commentary pointed to the burden of heavy artificial intelligence investment and the funding needed to pay for it, even though international oil prices were lower. On Nov....
Read more

AMD MEXT Cuts Server DRAM Needs by Up to 75%: What It Means for Memory Makers

AMD MEXT Cuts Server DRAM Needs by Up to 75%: What It Means for Memory Makers
AMD has introduced software that lets servers run with far less DRAM, the fast working memory that sits next to a processor. The company says its MEXT software can cut the DRAM a workload needs by 20% to 75%, depending on the job, while keeping up to 99% of the performance of an all-DRAM setup. The timing matters. Memory prices have surged as artificial intelligence data centers buy up supply, and many server buyers want to spend less on it. For the two biggest memory makers, Samsung Electronics and SK hynix, the news raises a fair question: what happens to demand if customers learn to need less DRAM? What is AMD and what is MEXT? AMD, short for Advanced Micro Devices, is a U.S. chip designer best known for the CPUs, or central processing units, that act as the brain of PCs and servers, along with graphics chips. In June 2026 it bought a startup called MEXT, which had built software that treats flash storage as an extension of system memory. AMD presented the technology alongside it...
Read more