KOSPI slips as US bond yields, oil prices weigh on investor sentiment

Seoul stocks fell Tuesday as rising U.S. Treasury yields and oil prices weighed on investor sentiment, with the KOSPI opening lower and closing down 0.27 percent. Foreign investors sold a net 2.9 trillion won, while retail investors and institutions bought 1.14 trillion won and 121.1 billion won, respectively. The Kosdaq reversed losses late and ended up 0.38 percent. The won strengthened 8.4 won against the U.S. dollar to close at 1,356.7 won.

The KOSPI opened at 6,844.41, down 0.66 percent from the previous close, and finished at 6,870.81.

Foreign investors posted net sales of 2.9 trillion won, while retail investors and institutions were net buyers.

Samsung Electronics closed at 272,500 won, up 0.93 percent, while SK hynix fell 0.17 percent to 1.76 million won.

The Kosdaq opened 0.32 percent lower at 843.87 and ended the session at 849.80, up 0.38 percent.

The won closed at 1,356.7 won against the U.S. dollar, strengthening 8.4 won on the day.

Published Sep 29, 2026 4:30 pm KST

A stock ticker at Hana Bank's headquarters in Seoul shows the benchmark KOSPI closing at 6,870.81, down 0.27 percent from the previous close, Tuesday. Yonhap

Seoul stocks fell Tuesday as rising U.S. Treasury yields and oil prices weighed on investor sentiment, with the benchmark KOSPI opening lower and remaining in negative territory for most of the session.

The index opened at 6,844.41, down 0.66 percent from the previous close, according to the Korea Exchange. It moved in a narrow range below the flat line before closing at 6,870.81, down 0.27 percent.

Retail investors and institutions were net buyers of 1.14 trillion won ($842 million) and 121.1 billion won, respectively, while foreign investors sold a net 2.9 trillion won.

Oil prices rose and U.S. Treasury yields remained elevated amid the escalating standoff between Washington and Tehran.

Over the weekend, U.S. President Donald Trump rejected an Iranian proposal to reopen the Strait of Hormuz and resume nuclear talks in exchange for the lifting of a U.S. naval blockade, among other concessions.

The yield on the 10-year Treasury note, a global benchmark for borrowing costs, remained above 5.2 percent, its highest level since mid-2007.

Higher yields and oil prices weighed on Wall Street overnight, with all three major U.S. stock indexes ending lower. Several major technology and semiconductor stocks, including Qualcomm, Intel, Micron and SanDisk, also fell amid renewed concerns over risks surrounding artificial intelligence, adding to the pressure on Korean chip stocks.

Shares of the two semiconductor heavyweights, which had plunged more than 5 percent in the previous session, attempted a recovery. Samsung Electronics closed at 272,500 won, up 0.93 percent.

SK hynix, however, fell 0.17 percent to 1.76 million won amid lingering concerns that a separate listing of its U.S. subsidiary Solidigm could dilute the value attributed to the parent company. Reports that the chipmaker's NAND flash and solid-state drive subsidiary is preparing for an initial public offering next year have raised concerns among investors over a potential “double listing.”

The secondary bourse Kosdaq initially followed the broader market, opening 0.32 percent lower at 843.87 and remaining in negative territory for most of the session. It reversed course late in the day, however, closing at 849.80, up 0.38 percent.

At Tuesday's event during Korea Premium Week, the Korea Exchange said it plans to introduce a new tiered system for the Kosdaq market next year, dividing listed companies into “premium” and “standard” segments as part of efforts to strengthen the market.

The release of detailed plans, however, was postponed yet again, despite having been expected alongside the announcement.

In the Seoul foreign exchange market, the won strengthened 8.4 won against the U.S. dollar to close at 1,356.7 won.

周二，受美国国债收益率和油价上涨影响，韩国股市下跌，韩国综合股价指数（KOSPI）开盘走低，最终收跌0.27%。外国投资者净卖出2.9万亿韩元，而散户和机构投资者分别净买入1.14万亿韩元和1211亿韩元。韩国创业板指数（KOSDAQ）尾盘扭转跌势，最终收涨0.38%。韩元兑美元汇率上涨8.4韩元，收于1356.7韩元。

韩国综合股价指数（KOSPI）开盘报6844.41点，较前一交易日收盘下跌0.66%，收于6870.81点。

外国投资者净卖出2.9万亿韩元，而散户投资者和机构投资者均为净买入。

三星电子股价收于 272,500 韩元，上涨 0.93%；SK 海力士股价下跌 0.17%，至 176 万韩元。

韩国创业板指数开盘下跌0.32%，报843.87点，收盘上涨0.38%，报849.80点。

韩元兑美元收于1356.7韩元，当日上涨8.4韩元。

发布于2026年9月29日下午4:30（韩国标准时间）

韩联社报道，位于首尔韩亚银行总部的股票行情显示屏显示，韩国综合股价指数（KOSPI）周二收于6870.81点，较前一交易日下跌0.27%。

周二，由于美国国债收益率和油价上涨打击了投资者情绪，首尔股市下跌，基准韩国综合股价指数（KOSPI）开盘走低，并在大部分交易日内保持下跌趋势。

据韩国交易所数据显示，该指数开盘报6844.41点，较前一交易日收盘下跌0.66%。随后该指数在横盘整理线下方窄幅波动，最终收于6870.81点，下跌0.27%。

散户投资者和机构投资者分别净买入 1.14 万亿韩元（8.42 亿美元）和 1211 亿韩元，而外国投资者净卖出 2.9 万亿韩元。

随着华盛顿和德黑兰之间的对峙不断升级，油价上涨，美国国债收益率居高不下。

上周末，美国总统唐纳德·特朗普拒绝了伊朗提出的重新开放霍尔木兹海峡并恢复核谈判的提议，伊朗希望伊朗解除对霍尔木兹海峡的封锁，并做出其他让步。

作为全球借贷成本基准的10年期美国国债收益率保持在5.2%以上，为2007年年中以来的最高水平。

隔夜，收益率上升和油价上涨令华尔街股市承压，美国三大股指全线收跌。包括高通、英特尔、美光和闪迪在内的多家大型科技和半导体公司也因人工智能风险担忧重燃而下跌，加剧了韩国芯片股的压力。

两家半导体巨头的股价在前一交易日暴跌超过5%后，试图反弹。三星电子收于272,500韩元，上涨0.93%。

然而，由于市场持续担忧其美国子公司Solidigm的单独上市可能会稀释母公司的估值，SK海力士股价下跌0.17%，至176万韩元。有报道称，这家芯片制造商的NAND闪存和固态硬盘子公司正准备明年进行首次公开​​募股（IPO），这引发了投资者对潜在“双重上市”的担忧。

韩国二级市场Kosdaq最初跟随大盘走势，开盘下跌0.32%，报843.87点，并在大部分交易时段保持下跌。然而，该指数在尾盘扭转颓势，最终收于849.80点，上涨0.38%。

在周二举行的韩国优质周活动上，韩国交易所表示，计划明年在韩国创业板市场推出新的分级制度，将上市公司分为“优质”和“标准”板块，以加强市场。

然而，尽管人们预期详细计划会与公告一同发布，但该计划的发布再次被推迟。

在首尔外汇市场，韩元兑美元汇率上涨 8.4 韩元，收于 1,356.7 韩元。