Seoul shares soar over 6 pct on revived AI optimism, SK hynix earnings

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SEOUL, Oct. 28 (Yonhap) -- Seoul shares surged by more than 6 percent Wednesday, led by a rally in chipmakers after SK hynix reported record quarterly earnings and announced additional shareholder returns. The Korean won weakened against the U.S. dollar.

The benchmark Korea Composite Stock Price Index (KOSPI) gained 374.1 points, or 6.63 percent, to close at 6,012.44, after rising as high as 6,032.28.

As the market rallied on tech gains, the Korea Exchange activated a buy-side sidecar shortly before 11 a.m., suspending program trading buy orders for KOSPI-listed stocks for five minutes.

The measure is triggered when KOSPI 200 futures rise at least 5 percent and stay at that level for at least one minute. It was activated for the second straight session.

Earlier in the day, SK hynix reported record-high revenue and operating profit for the third quarter on robust memory chip demand amid the artificial intelligence (AI) boom. The world's second-largest memory chip maker announced a shareholder return program worth more than 100 trillion won (US$75.3 billion) for 2026.

Investors were also awaiting the Federal Reserve's interest rate decision scheduled for early Thursday (Korean time), looking for signals on the future path of U.S. interest rates.

Financial data is shown on a screen in the dealing room of Hana Bank in central Seoul on Oct. 28, 2026. (Yonhap)

ejkim@yna.co.kr (END)

Seoul shares soar over 6 pct on revived AI optimism, SK hynix earnings

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首尔，10月28日（韩联社）——周三，首尔股市上涨逾6%，芯片制造商股价领涨，此前SK海力士公布了创纪录的季度盈利，并宣布了额外的股东回报计划。韩元兑美元汇率走弱。

韩国综合股价指数（KOSPI）上涨374.1点，涨幅6.63%，收于6012.44点，盘中最高触及6032.28点。

随着科技股上涨带动市场反弹，韩国交易所于上午 11 点前不久启动了买方侧车交易，暂停了 KOSPI 上市股票的程序化交易买单 5 分钟。

当KOSPI 200指数期货上涨至少5%并维持在该水平至少一分钟时，该措施将被触发。这是该措施连续第二个交易日启动。

当天早些时候，SK海力士公布第三季度营收和营业利润均创历史新高，这主要得益于人工智能（AI）热潮推动的强劲存储芯片需求。这家全球第二大存储芯片制造商还宣布了一项股东回报计划，总额超过100万亿韩元（约合753亿美元），将于2026年实现。

投资者也在等待美联储定于周四（韩国时间）早些时候公布的利率决议，以寻找美国利率未来走向的信号。

2026年10月28日，首尔市中心韩亚银行交易室内的屏幕上显示着金融数据。（韩联社）

ejkim@yna.co.kr (完)

受人工智能乐观情绪重燃和SK海力士财报提振，首尔股市飙升逾6%。