South Korean KOSPI Index Plunges 16 Percent in Two-Day Retail Selloff

Despair and frustration spread rapidly across South Korean retail-investing communities as stocks cratered in consecutive sessions. The benchmark KOSPI index dived as much as 12.6% during hectic morning trading, forcing a 20-minute circuit breaker halt for the second straight day. Though the index trimmed some losses to close down 6% at 5,663.24, the two-day rout extended a monthly drop to a record 33% and erased almost 40% of the market’s value from a peak reached little more than a month ago.

Trading volumes remained remarkably light. Market participants noted that buyers had evaporated from what was recently the hottest trade in global markets—purchasing shares of domestic chipmakers raking in cash from the artificial intelligence boom. Much of that retail buying relied on borrowed money, creating a feedback loop where falling prices forced brokers to forcibly liquidate losing positions.

SK Hynix Disappoints Despite Sixfold Profit Jump

The catalyst for the latest panic arrived with corporate earnings from semiconductor manufacturers. SK Hynix reported a six-fold jump in profit, yet the results still lagged behind lofty analyst expectations. The chipmaker’s shares plunged as much as 20% before paring losses to close down 9.6% in Seoul.

South Korea’s KOSPI Index Plunges Over 8 Percent Triggering Circuit Breaker

Samsung Electronics mirrored the downward trajectory, tumbling as much as 14% before closing 5.2% lower. Together, SK Hynix and Samsung account for more than half of the KOSPI’s total market value, exerting substantial influence over the broader index as traders scramble to reassess valuations amid a shifting memory chip landscape.

Leveraged Retail Trades Unravel Amid Government Apology

The mechanics of the selloff pointed directly to the rapid unwind of aggressive retail leverage. Single-stock leveraged products had provided individual investors with an increase in their exposure to the market.

South Korea’s Kospi Plunges 10.8% as Chipmaking Stocks Trigger Asian Rout

Political fallout followed swiftly. Finance Minister Koo Yun-cheol apologized before parliament for the introduction of single-stock leveraged exchange-traded funds, conceding they had not been considered carefully enough. Following an emergency evening meeting alongside the governor of the Bank of Korea and financial regulators, the finance ministry announced plans to pursue individual investment limits capped at 20% of an investor’s total investment amount, alongside higher trading costs and simulated trading requirements.

South Korea Regulator Sets 30M Won Cash Rule for Leveraged ETFs

Regional Contagion and Global Tech Pressures

The shockwaves rippled far beyond Seoul, dragging down semiconductor supply chains across Asia and raising broader questions about global artificial intelligence capital expenditure.

Analysts tied the broader tech retreat to mounting unease over debt-financed datacenter expansions and technological strides by competitors. It was noted that markets were likely spooked by reports of progress in China’s deep ultraviolet chip-making equipment capabilities, which threatened the competitive position of global equipment leaders.

As investors reassess cyclical risks and policymakers prepare emergency stabilization measures, market participants remain uncertain whether the local equity market has established a definitive floor.