Seoul stocks extend losses as AI, US inflation concerns persist

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 11:39 am KST

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

Seoul stocks were trading sharply lower late Thursday morning as concerns over artificial intelligence (AI) trade and U.S. inflation data sparked a sell-off of major tech shares.

The benchmark Korea Composite Stock Price Index (KOSPI) fell 404.21 points, or 6.73 percent, to 5,604.6 as of 11:20 a.m.

In early trading, the benchmark index had fallen over 5 percent, triggering the country's bourse operator to temporary suspend trading for five minutes.

Overnight, U.S. stocks closed lower as concerns over the sustainability of AI spending and September consumer price data dampened investor sentiment.

The U.S. Consumer Price Index (CPI) for September rose 0.6 percent from a month earlier, the fastest level seen since April, according to official data released Wednesday (U.S. time).

In Seoul, most market top caps were trading lower.

Chip titans Samsung Electronics and SK hynix tumbled 7.87 percent and 9.87 percent, respectively.

Industry leader Hyundai Motor fell 5.1 percent, financial firm KB Financial slid 1.13 percent and defense giant Hanwha Aerospace dipped 1.54 percent.

Among the few winners was bio firm Celltrion, which added 3.13 percent.

The Korean won was trading at 1,350 won against the U.S. dollar as of 11:20 a.m., down 7.7 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11:39（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）

周四上午晚些时候，首尔股市大幅下跌，原因是市场对人工智能 (AI) 贸易和美国通胀数据的担忧引发了主要科技股的抛售。

截至上午11点20分，韩国综合股价指数（KOSPI）下跌404.21点，跌幅6.73%，至5604.6点。

早盘交易中，基准指数下跌超过 5%，导致该国证券交易所运营商暂停交易 5 分钟。

隔夜，由于对人工智能支出可持续性的担忧以及9月份消费者价格数据的下滑，美国股市收低，投资者情绪受到打击。

根据周三（美国时间）公布的官方数据，美国9月份消费者价格指数（CPI）环比上涨0.6%，创下4月份以来的最快涨幅。

在首尔，大多数市值较大的股票交易价格下跌。

芯片巨头三星电子和SK海力士的股价分别下跌了7.87%和9.87%。

行业领军企业现代汽车股价下跌 5.1%，金融公司 KB Financial 股价下跌 1.13%，国防巨头韩华航空航天股价下跌 1.54%。

少数几家赢家之一是生物技术公司 Celltrion，该公司股价上涨了 3.13%。

截至上午 11 点 20 分，韩元兑美元汇率为 1350 韩元，较前一交易日收盘价下跌 7.7 韩元。