Koo Yun-cheolHan Ji-youngSamsung ElectronicsTSMCSK Hynix

South Korean chip stocks plunge as KOSPI index dives 12.6% following disappointing earnings from SK Hynix and Samsung Electronics

South Korean chip stocks plummeted as the KOSPI index fell 12.6%, following disappointing earnings from SK Hynix and Samsung Electronics. The index's decline marks a staggering 40% drop from its recent peak, with SK Hynix shares down 9.6% and Samsung down 5.2%.

Reuters Reuters+1 source29 July 2026 · 09:42 UTC
CuriousCats Full Story

South Korea's KOSPI index experienced a dramatic decline, falling as much as 12.6% on Wednesday, following disappointing earnings reports from major chipmakers SK Hynix and Samsung Electronics. This drop extends a near 11% slump from the previous day, marking the index's lowest level since early April.123

The market has now lost nearly 40% of its value from a peak just over a month ago, raising concerns among investors. SK Hynix saw its shares plummet 9.6% after reporting a six-fold profit increase that still fell short of expectations, while Samsung shares dropped 5.2% after a similar trend.

Analysts noted that the disappointing results from SK Hynix have sparked panic selling, with Han Ji-young from Kiwoom Securities stating, “Hopes of the market rebounding today after a 10% plunge yesterday faded, triggering panic selling and forcing most stock investors to book losses.”6

Despite the recent turmoil, the KOSPI remains up 41.5% in U.S. dollar terms year-to-date, making it the best-performing major market this year. The South Korean government is reportedly reviewing market stabilization measures, as the two chipmakers account for over half of the KOSPI's market capitalization.5

The fallout has also affected shares in Taiwan’s TSMC, which fell 3% on the same day, reflecting broader concerns in the semiconductor sector.

Key Insight
“The KOSPI index has now erased almost 40% of its value from a peak reached just over a month ago, marking its steepest monthly decline on record. Analysts express concerns that the disappointing results from SK Hynix reflect broader worries about the sustainability of tech spending in the current market.”
CuriousCats studied:
1
ReutersReuters
“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.”
Reuters →
2
The GuardianThe Guardian
“Shares in companies linked to AI have plunged further after disappointing results from the South Korean chipmaker SK Hynix, which sent the country’s stock market tumbling for a.”
The Guardian →
Ask CuriousCats
What caused the KOSPI index to drop?
Who are the key players in South Korea's chip market?
Why did SK Hynix report disappointing earnings?
Are other tech sectors facing similar declines?
How does this performance compare to previous market downturns?
Become the most informed
person in the room.
Personal AI agents scanning 100,000+ sources — news, video, and social media — delivered every morning.
Download the App Go to CuriousCats.ai
🇺🇸 US🇮🇳 India🇬🇧 UK🇨🇦 Canada🇸🇬 Singapore
Liked the depth here?
Get the full internet briefed for you any time of the day.
Get CuriousCats