South Korean markets suffered a $2.18 trillion equity rout on July 29, 2026, as the benchmark KOSPI index plunged 6% following disappointing earnings from memory chip giant SK Hynix. The downturn triggered emergency circuit breakers for a second session amid widespread retail panic and surging leverage unwinds.
Asia’s high-flying artificial intelligence rally ran headlong into a brutal market reckoning this week, wiping value off South Korea’s exchanges. The benchmark Kospi index tumbled 6% on Wednesday, deepening a two-day slide that erased 16% from the index and drove losses for the month to a record 33%, according to Bloomberg. The sharp contraction follows weeks of mounting investor anxiety over whether the astronomical pace of global spending on artificial intelligence infrastructure can be sustained.
SK Hynix Results Disappoint Despite Record Profits
The selling pressure centered heavily on SK Hynix, which announced preliminary financial results for the second quarter of 2026 showing revenue of 79.32 trillion won and an operating profit of 60.54 trillion won, reported Hankyung. While the chipmaker posted a six-fold surge in profit driven by soaring demand for high-bandwidth memory (HBM) chips and advanced DRAM, the figures missed analyst expectations.
A consensus of 22 brokerage houses surveyed ahead of the announcement had anticipated revenue of 83.65 trillion won and an operating profit of 63.66 trillion won. Actual performance fell roughly 5% below those projections. Analysts pointed to a slower-than-expected rise in blended average selling prices (ASPs) for cloud service providers as a primary factor behind the shortfall.
“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.”
Han Ji-young, analyst at Kiwoom Securities
Market reaction was swift and punishing. SK Hynix shares dropped nearly 20% during intraday trading before paring losses to close down 9.6% on the Reuters wire. Neighboring tech heavyweight Samsung Electronics absorbed a 5.2% decline after dropping as much as 14% earlier in the session. Together, the two semiconductor titans represent more than half of the Kospi’s total market capitalization, leaving the broader exchange uniquely exposed to their volatility.
Leveraged Retail Positions Accelerate the Selloff
The depth of the collapse caught individual investors off guard. Much of South Korea’s preceding equity boom had been fueled by small-time retail traders utilizing borrowed money and single-stock leveraged exchange-traded funds to maximize exposure to the semiconductor surge. As prices fell, brokers forcibly liquidated losing positions, creating a cascade of margin calls.
Political fallout followed the market turmoil. Facing intense questioning during a parliamentary session, South Korean Finance Minister Koo Yun-cheol apologized for the introduction of single-stock leveraged ETFs, acknowledging that the financial instruments had not been evaluated with sufficient caution.
Market observers noted that the speed of the unwinding highlighted structural vulnerabilities within domestic retail trading. If you look at what is falling in the market, it has been the stocks in which you have the most leverage,
observed Frank Benzimra, pointing out that crowded trades are unravelling rapidly across the region.
Broader Semiconductor and Regional Market Fallout
The rout in Seoul quickly spilled across Asian supply chains. Taiwan Semiconductor Manufacturing Co. (TSMC), the world’s largest contract chipmaker, fell 3.5% in Taipei. In Japan, Tokyo Electron sank 10.6% and Lasertec Corp. dropped 8.3%, dragging the Nikkei 225 down 1.5%.
Whether those assurances can stem the tide remains an open question for market participants who watched the index slide as much as 12.6% before closing down 6% for the second session. As volume dries up and buyers step to the sidelines, traders across Seoul are bracing for a prolonged period of price discovery.