(LEAD) KOSPI crashes over 8 pct on tech hemorrhage, U.S. rate woes; won rises after verbal intervention

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SEOUL, June 8 (Yonhap) -- South Korean stocks nosedived more than 8 percent Monday, extending their losing streak to a third consecutive session, as investors dumped market heavyweights on renewed woes over artificial intelligence (AI) profitability and concerns over a possible hawkish pivot of the U.S. Federal Reserve.

The local currency rose against the U.S. dollar after opening at a 17-year low, in the face of verbal intervention by financial authorities.

The benchmark Korea Composite Stock Price Index (KOSPI) plunged 676.18 points, or 8.29 percent, to close at 7,484.41, after falling as low as 7,442.73. The secondary KOSDAQ index sank more than 9 percent to end at 911.39.

The KOSPI's trade volume was heavy at 448.3 million shares worth 47.8 trillion won (US$31.2 billion), with losers sharply outnumbering winners 873 to 42. Foreigners and institutions dumped local shares worth 355.5 billion won and 1.6 trillion won, respectively, while retail investors scooped up 1.76 trillion won.

A dealing room at Hana Bank in Seoul on June 8, 2026 (Yonhap)

The Monday crash was largely anticipated on sharp losses on Wall Street last week, fueled by semiconductor shares' biggest daily percentage drop since March 2020 and fears over a possible rate hike by the Fed sparked by a hotter-than-expected U.S. jobs report for May.

The Dow Jones Industrial Average closed 1.35 percent lower Friday (local time), while the S&P 500 dipped 2.64 percent and the tech-heavy Nasdaq composite slid 4.18 percent.

Major U.S. chip shares sharply lost ground, with Nvidia slumping 6.2 percent, Broadcom contracting 7.92 percent and Micron shooting down 13.25 percent.

The Korea Exchange (KRX) had activated a circuit breaker for the KOSPI about three minutes after opening, halting trading for 20 minutes, and implemented a consecutive sell-side sidecar at around 9:34 a.m.

The KRX had also issued a sell-side sidecar for the secondary KOSDAQ market about six minutes after opening, suspending trading for five minutes, and activated a circuit breaker for the index later in the day after the KOSDAQ fell by more than 8 percent.

"Today's pullback appears to be driven not by the weakening of market fundamentals, but by profit-taking sentiment among investors, mainly targeted at the semiconductor sector, as the market reacted more sensitively to negative developments after an extended rally of chip shares," a report by Samsung Securities said.

The KOSPI has been one of the best performing stock indexes across the world in