Seoul | EcoPulse24

South Korea's benchmark KOSPI index plunged 9.99% to 8,204 on Tuesday, suffering one of its steepest declines in years as a global selloff in technology stocks triggered heavy losses across the country's semiconductor sector.

The sharp retreat followed overnight weakness on Wall Street and ended a remarkable rally that had recently pushed Korean equities to record highs.

Market sentiment was further weighed down by concerns over elevated valuations and growing regulatory scrutiny of leveraged products linked to South Korea's semiconductor industry.

Foreign investors were heavy net sellers throughout the session, intensifying downward pressure on the market.

Semiconductor Giants Lead Market Decline

Losses were concentrated among South Korea's largest technology companies.

SK Hynix fell 11.78%, while Samsung Electronics tumbled 11.17%.

Other major decliners included:

• Hyundai Motor: -12.05%

• Kia Corp: -8.85%

• LG Energy Solution: -6.10%

• HD Hyundai Heavy Industries: -7.23%

• SK Square: -5.18%

The broad-based decline highlighted the market's heavy dependence on technology and semiconductor companies, which account for a significant portion of South Korea's equity market capitalization.

AI Semiconductor Boom Meets Valuation Concerns

The selloff comes despite continued optimism surrounding artificial intelligence and advanced memory chips.

Investors have closely followed the intensifying competition between South Korea's semiconductor giants.

Recently, SK Hynix overtook Samsung Electronics as South Korea's most valuable listed company, reflecting investor enthusiasm for the company's leadership in high-bandwidth memory (HBM) chips used in AI systems.

Samsung, meanwhile, reported that sales of its HBM4 memory products exceeded $1 billion within four months of launch, underlining strong demand for AI infrastructure components.

EcoPulse24 Analysis | When the Most Loved Trade Becomes the Most Crowded Trade

The sharp decline in Korean equities highlights a recurring pattern in financial markets.

The biggest market corrections often occur not in weak sectors but in the market's strongest and most crowded trades.

Over the past year, South Korea became one of the world's most direct investment vehicles for the artificial intelligence boom through its dominant semiconductor industry.

SK Hynix and Samsung emerged as major beneficiaries of surging demand for AI servers and advanced memory technologies.

That success also produced stretched valuations and concentrated positioning.

When global technology sentiment weakened, investors rapidly moved to reduce exposure to sectors that had previously generated outsized gains.

The heavy selling by foreign investors further amplified the decline.

Importantly, the selloff does not necessarily signal a deterioration in the long-term outlook for artificial intelligence or semiconductor demand.

Instead, it illustrates how markets periodically reset expectations when valuations run ahead of fundamentals.

For investors, Tuesday's plunge serves as another reminder that even companies sitting at the center of the AI revolution remain vulnerable to sharp corrections when optimism becomes excessively concentrated.mics، بيانات الأسواق