Seoul stocks open sharply lower on lingering concerns over AI, US inflation

The KOSPI tumbled 348.47 points, or 5.8 percent, to 5,660.34 in Seoul on Thursday as of 9:15 a.m., amid concerns about AI investment returns and hotter-than-expected U.S. inflation. The decline triggered a sell-side sidecar and extended Seoul stocks’ losing streak to six sessions. Samsung Electronics and SK hynix fell more than 6 percent and 8 percent, respectively, while the won weakened to 1,343.3 per dollar.

The U.S. Consumer Price Index rose 0.6 percent in September from the previous month, bringing annual inflation to 3.7 percent versus economists’ 3.6 percent expectation.

The S&P 500 fell 1.11 percent and the Nasdaq declined 1.88 percent overnight.

Hyundai Motor dropped 4.31 percent, Hanwha Aerospace slipped 0.24 percent and Celltrion retreated 1.39 percent.

The Korean won weakened by 1 won from the previous session’s close to trade at 1,343.3 won per U.S. dollar as of 9:15 a.m.

Published Oct 15, 2026 9:16 am KST

Updated Oct 15, 2026 9:36 am KST

The benchmark KOSPI is displayed at a dealing room of Hana Bank in Seoul, Thursday. Yonhap

Seoul stocks opened sharply lower Thursday, as concerns over the sustainability of artificial intelligence (AI) and hotter-than-expected inflation in the United States dampened investor sentiment.

After opening sharply lower, the benchmark Korea Composite Stock Price Index (KOSPI) tumbled 348.47 points, or 5.8 percent, to 5,660.34 as of 9:15 a.m.

The sharp drop in the index triggered the country's bourse operator to issue a sell-side sidecar soon after the market opened.

Seoul stocks have continued their losing streak for the past six consecutive sessions.

Major stock indexes on Wall Street closed lower overnight amid growing inflation concerns and skepticism over whether the AI boom could live up to investors' expectations.

The S&P 500 shed 1.11 percent, and the tech heavy Nasdaq dipped 1.88 percent.

The U.S. Consumer Price Index rose 0.6 percent in September from a month earlier, bringing the annual rate of inflation to 3.7 percent, above economics' expectations for a 3.6 percent increase.

Also, investors still remained skeptical about whether AI investment could generate expected returns.

Seoul's two chip giants moved in tandem with tech firms on Wall Street, with Samsung Electronics and SK hynix dipping over 6 percent and 8 percent, respectively.

Carmaker Hyundai Motor shed 4.31 percent, defense giant Hanwha Aerospace inched down 0.24 percent, and bio firm Celltrion retreated 1.39 percent.

The Korean won was trading at 1,343.3 won against the U.S. dollar as of 9:15 a.m., down 1 won from the close of the previous stock trading session.

周四上午9点15分，韩国综合股价指数（KOSPI）在首尔暴跌348.47点，跌幅5.8%，收于5660.34点，主要原因是市场担忧人工智能投资回报以及美国通胀预期高于预期。此次下跌引发了卖方横盘整理，并导致首尔股市连续第六个交易日下跌。三星电子和SK海力士的股价分别下跌超过6%和8%，韩元兑美元汇率跌至1343.3。

美国9月份消费者价格指数环比上涨0.6%，使年度通胀率达到3.7%，高于经济学家预期的3.6%。

隔夜，标普500指数下跌1.11%，纳斯达克指数下跌1.88%。

现代汽车股价下跌 4.31%，韩华航空航天股价下跌 0.24%，赛尔特龙股价下跌 1.39%。

截至上午9点15分，韩元兑美元汇率较前一交易日收盘价下跌1韩元，报1343.3韩元兑1美元。

发布于2026年10月15日上午9:16（韩国标准时间）

更新于2026年10月15日上午9:36（韩国标准时间）

周四，首尔韩亚银行交易室展示着韩国综合股价指数（KOSPI）。（韩联社）

周四首尔股市开盘大幅走低，原因是人们对人工智能（AI）的可持续性以及美国通胀高于预期感到担忧，这打击了投资者的信心。

韩国综合股价指数（KOSPI）开盘大幅走低后，截至上午9点15分，下跌348.47点，跌幅5.8%，至5660.34点。

该指数的急剧下跌促使该国证券交易所运营商在市场开盘后不久发布了卖方追加保证金。

首尔股市已连续六个交易日下跌。

由于通胀担忧加剧以及对人工智能热潮能否达到投资者预期持怀疑态度，华尔街主要股指隔夜收低。

标准普尔500指数下跌1.11%，以科技股为主的纳斯达克指数下跌1.88%。

美国9月份消费者价格指数环比上涨0.6%，年通胀率达到3.7%，高于经济学家预期的3.6%。

此外，投资者仍然对人工智能投资能否产生预期回报持怀疑态度。

首尔两大芯片巨头与华尔街科技公司走势一致，三星电子和SK海力士股价分别下跌超过6%和8%。

汽车制造商现代汽车股价下跌 4.31%，国防巨头韩华航空航天股价小幅下跌 0.24%，生物技术公司 Celltrion 股价下跌 1.39%。

截至上午 9 点 15 分，韩元兑美元汇率为 1,343.3 韩元，比前一交易日收盘价下跌 1 韩元。