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Asian markets today: South Korea's Kospi crashes 8%, plunges below 5,000 | What's behind the sell-off?

By · Published by Everything Blog

In short

The rout was triggered by an overnight Wall Street sell-off, where an index of U.S. semiconductor stocks logged a 12% drop, its steepest single-day decline since March 2020. Major domestic chipmakers Samsung Electronics and SK Hynix bore the brunt of the downturn, each sliding more than 11% before recovering some ground. Meanwhile, regional indices including Japan’s Nikkei 225 and Taiwan’s Taiex have fallen 20% from their peak levels. South Korea's Finance Ministry announced that officials are actively monitoring conditions to take timely, preventive steps against excessive market volatility.

Key points

  • Growing investor fears regarding a slowdown in Big Tech spending on artificial intelligen…: Growing investor fears regarding a slowdown in Big Tech spending on artificial intelligence infrastructure triggered the steep global market downturn.
  • Concerns over tighter tech regulations following a potential Democratic Party sweep in Un…: Concerns over tighter tech regulations following a potential Democratic Party sweep in United States midterm elections accelerated the equity sell-off.
  • The latest decline leaves the KOSPI down nearly 46 percent from its record peak reached e…: The latest decline leaves the KOSPI down nearly 46 percent from its record peak reached earlier in June.

Sources checked by our analysis pipeline: 1

Asian markets today: South Korea's benchmark KOSPI index plunged 8.5% in early trading on Friday, November 6, tracking a sharp sell-off in artificial intelligence (AI) and semiconductor stocks on Wall Street overnight. Trading on the Korea Exchange was suspended for 20 minutes after the index triggered its first 8% circuit breaker shortly after the market opened.

The steep decline dragged the KOSPI below the 5,000 mark, falling short of the target set by President Lee Jae Myung during his presidential campaign in 2025. The benchmark dropped as much as 8.8% before paring some losses.

The sell-off followed a global market rout on Thursday, which saw the Nasdaq 100 tumble 6.4%, wiping out a record $2.3 trillion in market capitalisation. South Korean equities bore the brunt of the global AI-related sell-off, given the country's heavy dependence on its two semiconductor giants.

The KOSPI had earlier surged past 9,000 in the summer, fuelled by the AI boom and strong gains in chipmakers, making South Korea one of the world's best-performing equity markets. However, concerns over a potential slowdown in AI infrastructure spending,…

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