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Semiconductor ETFs tripled their share of Korea's ETF market this year — then got caught in a selloff.
Semiconductor-themed ETFs saw their share of total ETF net assets jump from 5.3% to 14.9% between December and July, as investors bet heavily on a memory-chip recovery. That concentration became a liability once chip stocks fell sharply this month. Separately, the Korea Exchange raised the futures margin requirement on Samsung Electronics by 5.3 percentage points to 45%, citing rising market volatility. Together, the two moves highlight how concentrated risk has become in Korea's most popular trade.

Sources:

"Semiconductor ETFs Piled In, Then Got Hit by the Selloff" — Seoul Economic Daily, August 5, 2026
"Exchange Raises Margin Requirements as Volatility Rises" — Seoul Economic Daily, August 5, 2026

About AI PRISM:
AI PRISM is Seoul Economic Daily's WAN-IFRA award-winning newsroom AI series, delivering Korean economic news adapted for global audiences. Episodes are produced with AI assistance and reviewed by a human editor.

Tags:
#KOSPI #SemiconductorETF #KoreaMarkets #SamsungElectronics #AIPRISM #SeoulEconomicDaily #WANIFRA

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00:02Before you sign anything in Korea's COSDAC market,
00:06nearly 1 in 12 listed companies now sits below the threshold for staying listed.
00:13Samsung Electronics dropped roughly 8%, and Korea skipped the circuit breaker sidecar entirely.
00:21A US-listed active ETF is trailing its own COSDAC benchmark by almost 12 percentage points.
00:29SK Square is walking away from a 50 billion won airport transport business.
00:35Hong Kong just promised shareholders its biggest payout ratio yet.
00:40It's Tuesday, August 4th. Here's what investors are watching in Korea today.
00:46Korea's financial regulators tightened COSDAC delisting rules this year,
00:51raising the market cap floor and adding a sub-1,000 won stock price test.
00:56The COSDAC index has been a wild ride, spiking above 1,226 in April,
01:03before crashing back near 645 by month-end.
01:08That volatility is now colliding with a wave of individual investors
01:12piling into leveraged and single-stock ETFs.
01:17Here's what the numbers show.
01:20149 COSDAC stocks now trade under 1,000 won,
01:24and 214 fall below the 20 billion won market cap floor,
01:29together representing roughly 1 in 8 listed companies.
01:34The Korea Exchange is raising that market cap threshold to 30 billion won,
01:40about $21 million, starting in 2027.
01:44Individual investors pushed net inflows into Samsung Electronics'
01:49single-stock ETF products to 2.17 trillion won,
01:54more than the 2.1 trillion won they put into the actual share,
01:58even as Samsung fell 8% and the COSPI dropped 5%.
02:04Tighter deposit requirements cut individual trading in leveraged and inverse products by 93.8% this month.
02:13SK Square agreed to sell its airport limousine unit for 50 billion won,
02:18about $35 million, as TMAP Mobility refocuses on AI and data.
02:26Hong Kong's board approved a three-year shareholder return plan targeting a payout ratio in the mid-to-high 30s,
02:33up from 27% last year.
02:36So what does this mean for investors tracking Korea's markets?
02:41Earlier, we said nearly 1 in 12 COSDAC firms already sits below the listing bar.
02:47Here's what that means for you.
02:49The pool of delisting risk stocks only grows once the higher 30 billion won threshold arrives in 2027,
02:58meaning more forced M&A ahead.
03:01The gap between single-stock ETF demand and Samsung's own share price
03:06shows retail money is still chasing volatility despite the new curbs.
03:11Watch whether Hong Kong's payout pledge pushes other laggards toward Korea's 32% market average shareholder return ratio.
03:21That's today's AI Prism, Securities Daily.
03:24This episode was produced with AI assistance based on Seoul Economic Daily reporting
03:30and reviewed by a human editor.
03:32AI Prism is a Juan Ifra award-winning series.
03:36We'll be back tomorrow.
03:37For more on
03:40The D.
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