Korea Stock Market (KRX) Today (October 13): South Korea’s stock market came under intense pressure on Tuesday, October 13, 2026, as concerns about the global technology sector and growing competition in the semiconductor industry triggered a sharp sell-off. The benchmark Korea Composite Stock Price Index (KOSPI) fell below the psychologically important 6,000 mark during morning trading, prompting the Korea Exchange (KRX) to temporarily suspend program trading.
Samsung Electronics and SK Hynix led the decline as investors reacted to developments involving Chinese memory-chip maker ChangXin Memory Technologies (CXMT), falling US technology stocks and rising oil prices. Heavy foreign selling added to the pressure, while the tech-heavy KOSDAQ index also suffered significant losses.
The sell-off followed a difficult session on October 12, when South Korean equities had already suffered heavy losses. Investors now face concerns about semiconductor competition, upcoming corporate earnings and the possible impact of higher energy prices on inflation and interest rates.
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Korea Stock Market (KRX) Today (October 13): Why is the Korean Stock Market Down Today?
Several factors combined to push South Korean stocks sharply lower on Tuesday. The most immediate pressure came from weakness in global technology shares, but worries about China’s growing semiconductor capabilities added to selling in the country’s largest listed chipmakers.
The announcement from CXMT that it plans to introduce a next-generation server memory product using a 4F² cell structure by the end of 2026 raised concerns about future competition in the DRAM market. The technology aims to fit more memory cells onto a chip, potentially improving storage density. However, the announcement alone does not establish how quickly CXMT can scale production or compete with established manufacturers.
Foreign investors also sold heavily as traders reduced exposure to riskier assets. Rising oil prices and uncertainty surrounding upcoming US economic data added another source of concern. The combined pressure pushed the KOSPI below 6,000 and prompted the exchange to activate a sell-side sidecar.
Main reasons behind the sell-off
- Chinese semiconductor competition: CXMT’s planned server DRAM product raised concerns about future supply and pricing.
- Global technology weakness: Losses in US technology and semiconductor shares weakened investor sentiment across Asian markets.
- Foreign investor selling: Large net sales by overseas investors increased pressure on Korean equities.
- Fading buyback support: The completion or winding down of share repurchase programmes at major chipmakers reduced a source of buying support.
- Oil prices and inflation: Higher crude prices revived concerns about inflation, interest rates and the outlook for economic growth.
Korea Stock Market (KRX) Today (October 13): KOSPI Crashes Over 6% Below
The KOSPI suffered one of its sharpest declines in recent sessions on Tuesday, falling below 6,000 as investors rushed to reduce their exposure to South Korean equities.
The index opened at 6,186.08, down 3.10% from its previous close of 6,384.24. Selling intensified as the session progressed, with the benchmark falling to 5,996.16 by 10:40 a.m. local time, a decline of 6.08%.
The exchange activated a sell-side sidecar at 9:47:58 a.m. after KOSPI 200 futures fell more than 5% and remained at that level for the required period. The measure temporarily suspended program sell orders for five minutes. It was the first such KOSPI sell-side sidecar in roughly two months.
The drop below 6,000 marked a major setback for a market that had become increasingly sensitive to movements in technology stocks. Semiconductor companies account for a significant part of South Korea’s equity market, making the index particularly vulnerable when investors sell chipmakers.
KOSPI Index Today: Market Snapshot
|
Date and time |
October 13, 2026, 10:40 a.m. KST |
|
Current KOSPI |
5,996.16 |
|
Daily change |
−6.08% (−388.08 points) |
|
Previous close |
6,384.24 |
|
Opening level |
6,186.08 |
|
Sell-side sidecar activated |
9:47:58 a.m. KST |
The figures above represent a specific point in the morning session, rather than the final closing levels. The index continued to fluctuate as selling spread across major stocks.
Korea Stock Market (KRX) Today (October 13): KOSDAQ
South Korea’s secondary stock market also suffered heavy losses as investors sold technology, biotechnology and other growth-oriented shares.
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