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South Korea's KOSPI Tumbles 7.9% as SK Hynix, Samsung Shed $290 Billion

July 2, 2026 at 08:36 EDT

Infra & Chips
Finance

On July 2, South Korea's benchmark KOSPI index closed down 7.89% at 7,648 as a global selloff in AI-related semiconductor stocks spread. SK Hynix and Samsung Electronics alone lost roughly $290 billion in combined market value that day.

July 2, 2026 · Emerging Markets

South Korea's AI Rally Cracks: KOSPI Sinks 7.9%

A sell-off in AI-linked chip stocks led by SK Hynix and Samsung wiped out a combined $29 billion in market value and dragged emerging-market equities to a three-week low.

−7.9%

KOSPI decline on July 2

$29B

Value lost by SK Hynix & Samsung

40–50%

Of the index held in just 2 firms

A Month of Circuit Breakers

Three sharp single-day KOSPI declines, each triggering trading halts.

8.8%

~June 8

10%

June 23

7.9%

July 2

Leveraged Retail Investors Took the Brunt (June 23)

Leveraged products fell roughly 3× the underlying index drop.

−25.6%

SK Hynix-linked leveraged instruments

−24.6%

Samsung-linked leveraged instruments

The Optimists

A short-term pullback: normal profit-taking after a parabolic rally. Corporate fundamentals and long-term AI demand remain intact.

The Skeptics

An increasingly "leveraged bet" on AI — extreme concentration, memory-glut fears, and heavy retail borrowing magnify the downside.

A 2026 rally of 95–112% made the KOSPI the world's 8th-largest index — but concentration cuts both ways.

SK Hynix's market cap topped $1 trillion in May. With Samsung and SK Hynix at ~40–50% of the index, the market is highly sensitive to AI sentiment — and South Korea remains classified by MSCI as an emerging market.

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