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South Korea $2 trillion stock rout breaks records as SK Hynix results disappoint

By Thomson Reuters Jul 29, 2026 | 1:02 AM

By Gregor Stuart Hunter, Rae Wee and Jihoon Lee

SINGAPORE/SEOUL, July 29 (Reuters) – South Korean stocks plunged for a second straight session on Wednesday as Asia’s once-blazing AI rally morphed into a brutal market reckoning, wiping as much as $2.18 trillion from Seoul’s equity market and leaving leveraged ​retail investors reeling.

The benchmark KOSPI index dived as much as 12.6% before reversing some losses ‌to close down 6%, extending Tuesday’s near-11% rout and putting the market on course for its steepest monthly decline on record. The slide has erased almost 40% of the index’s value from a peak reached little more than a month ago.

Volumes were light, suggesting buyers have evaporated from what just weeks ago was the hottest trade in global markets — buying the chipmakers raking ‌in ​cash from AI investment.

Much of that buying was done by small-time investors ⁠using borrowed money to increase their ⁠exposure, and that dynamic, which accelerated the rally, is exacerbating the selloff as brokers forcibly shut down losing positions.

Under pressure from lawmakers during a parliamentary session, Finance Minister Koo Yun-cheol apologised for the introduction of single-stock leveraged ETFs, saying they had not been considered carefully enough. He added that the government is ​reviewing market stabilisation measures, including adjusting regulation related to the funds, which some analysts have blamed for increasing the amount of leveraged trading in the Seoul bourse.

“It’s certainly a very crowded trade which is being ⁠unwound,” said Frank Benzimra, head of Asia equity strategy at ⁠Societe Generale in Hong Kong.

“If you look at what is falling in the ​market, it has been the stocks in which you have the most leverage,” he said. “It’s very difficult to say ​when will this selloff end, but at the moment, it’s definitely not the trade ‌where we want to be.”

Even blockbuster earnings from SK Hynix, which reported a six-fold jump in profit, failed to stem the panic as the results lagged lofty expectations. The chipmaker’s shares slumped nearly 20% before recovering some ground, closing down 9.6%, while Samsung Electronics fell as much as 14% before trimming losses to 5.2%.

Together, the ⁠two chip giants account for more than half of the KOSPI’s market value and have exerted substantial influence over the market this year as traders seek a slice of the lucrative AI trade amid a shortage of ⁠advanced memory chips.

Shares in Taiwan’s TSMC, ‌the world’s biggest contract chipmaker, fell 3.5% in Taipei.

“Hopes of the market rebounding ⁠today after a 10% plunge yesterday faded, triggering panic selling and forcing most ​stock investors ‌to book losses,” said Han Ji-young, an analyst at Kiwoom Securities. “Doubts are ​prevalent in the ⁠market that the current index level would not be the bottom.”

Despite the tumble, the KOSPI is up 41.5% in U.S. dollar terms year-to-date, making it the best-performing major market this year.

“Today’s price action suggests that the leverage within Korean equities remains high and a further unwind could be expected,” said Asia-Pacific macro strategist Wee Khoon Chong at BNY in Hong Kong.

($1 = 1,451.9000 won)

(Reporting by Gregor Stuart Hunter and Ankur Banerjee; Editing by Christopher Cushing, ​Subhranshu Sahu and Shri Navaratnam)