GBAF Logo
Global Banking & Finance Awards® 2026 Nominations open, free to enter Nominate now →
South Korea stock rout breaks records as SK Hynix earnings disappoint - Finance news and analysis from Global Banking & Finance Review
Finance

South Korea stock rout breaks records as SK Hynix earnings disappoint

Published by Global Banking & Finance Review

Posted on July 29, 2026

3 min read

· Last updated: July 29, 2026

Add as preferred source on Google

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

Record-Breaking Market Turmoil in South Korea

By Gregor Stuart Hunter, Rae Wee and Jihoon Lee

Market Plunge and Investor Impact

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.

Role of Leverage and Retail Investors

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.

Government Response and Regulatory Review

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.

Market Sentiment and Analyst Commentary

"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."

SK Hynix Earnings and Chipmaker Fallout

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.

Regional Impact: TSMC and Broader Market Effects

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

Investor Outlook and Future Expectations

"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.

Market Data and Reporting Credits

($1 = 1,451.9000 won)

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

Key Takeaways

  • KOSPI plunged 12.6% on July 29 after an ~11% drop the previous day—marking a record two-day decline amid a 40% retreat from the early‑June peak, highlighting extreme volatility tied to AI‑fuelled rallies now unwinding. (apnews.com)
  • SK Hynix shares dropped heavily despite reporting strong earnings, signaling profit‑taking and margin‑call selling amid excessive retail leverage in chip stocks. (investing.com)
  • The sell‑off is fueled by forced deleveraging: heavily leveraged retail investors and ETFs saw swift liquidations, amplifying the decline. (investing.com)

References

Frequently Asked Questions

Why did South Korea's stock market experience a record drop?
The stock market fell sharply due to disappointing SK Hynix earnings and the unwinding of an AI-fuelled rally, exacerbated by high leverage among small investors.
How much did the KOSPI index fall during the rout?
The KOSPI index dropped as much as 12.6% on Wednesday, following nearly an 11% fall on Tuesday, tracking a record two-day decline.
What role did chipmaker stocks play in the market slump?
SK Hynix and Samsung Electronics, which together represent over half the KOSPI's market cap, saw steep share price drops and heavily influenced the market downturn.
Is the South Korean government taking steps to stabilize the market?
Yes, the finance minister announced the government is reviewing potential market stabilisation measures, including considering regulations on leveraged ETFs.
What impact did leveraged investing have on the selloff?
Many small investors used borrowed money to buy into the rally, and forced sales of losing positions due to margin calls worsened the decline.

Tags

Related Articles

More from Finance

Explore more articles in the Finance category