Lead

South Korean stocks surged by more than 5 percent on Thursday, briefly pushing the benchmark KOSPI back above the 9,000-point threshold, as a strong earnings report from U.S. chipmaker Micron Technology fueled a rally in semiconductor shares, according to Yonhap News Agency. The index closed at 8,930.30, up 459.28 points, or 5.42 percent, after touching an intraday high of 9,044.04.

The gains follow a volatile week for the Korean market. The KOSPI hit an all-time high of 9,114.55 on Monday but plunged 9.99 percent on Tuesday, remaining below 9,000 since then. Thursday's advance, which came a day after a 3.26 percent rise, marked a strong rebound, aided by a buy-side sidecar mechanism triggered shortly after the market opened.

Coverage Comparison

Both versions of Yonhap's report — the lead article and a more detailed follow-up — present the same core facts: the KOSPI's gain, the role of Micron's earnings, the won's decline against the dollar, and the heavy institutional buying. The more detailed version adds information about trading volume, stock breadth, and sector movements, including airline shares rising on reports that the Strait of Hormuz may be reopening and oil prices falling.

The coverage frames the rally as a direct response to Micron's better-than-expected quarterly results, which helped assuage concerns about the sustainability of the artificial intelligence-driven market boom. Both versions quote analyst Kim Seok-hwan of Mirae Asset Securities, who attributed the rise in semiconductor shares to Micron's report.

Key Claims

  • The KOSPI gained 459.28 points, or 5.42 percent, to close at 8,930.30, after briefly topping 9,000 points, per Yonhap.
  • The index's rise was driven by a tech rally ignited by Micron Technology's expectation-beating earnings report, according to Yonhap, citing analyst Kim Seok-hwan.
  • The Korean won fell against the U.S. dollar, though the extent of the decline was not specified in the reports.
  • Institutions purchased a net 3.3 trillion won (approximately US$2.1 billion) worth of stocks on Thursday, while foreigners net sold 819.7 billion won and individuals net sold 2.5 trillion won.
  • Trade volume was heavy at 449.3 million shares worth 50.4 trillion won (US$32.7 billion), with losers outnumbering winners 588 to 289.
  • Samsung Electronics, the world's largest memory chipmaker, jumped 5.29 percent to 358,500 won, and No. 2 SK hynix surged 13.06 percent to 2.9 million won, according to the reports.
  • Bond prices closed higher, with the yield on three-year Treasurys falling 1.5 basis points to 3.757 percent, a detail included in the longer Yonhap version.

Perspectives

Market analysts view Micron's earnings as a key catalyst for the semiconductor sector, reinforcing confidence in the AI infrastructure spending boom. The brief return to the 9,000-point level signals a rapid recovery from Tuesday's sharp drop, but the market's volatility suggests ongoing uncertainty about the durability of the AI rally. The won's weakness against the dollar may reflect broader currency market dynamics, though the reports do not elaborate on the reasons.

All information in this article is based on Yonhap News Agency's coverage. No other sources were available for this story.