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Foreign investors extended their Korean selling streak to five months in September, even as Anthropic's massive AI spending plan briefly lifted chip stocks and Korean money flowed back into Japan.
Foreigners sold a net 21.51 trillion won of Kospi stocks in September, concentrated heavily in Samsung and SK Hynix, as rising U.S. bond yields drove reduced emerging-market risk exposure. Meanwhile, Korean retail investors flipped back to buying Japanese stocks after three months of selling, piling into index ETFs as BOJ rate concerns eased. Separately, Anthropic's IPO prospectus revealed plans for over $500 billion in AI infrastructure spending, and not a single stock currently qualifies for Korea's next MSCI index review given the market's recent weakness.

Sources:
- Foreigners Sell 21.5 Trillion Won in September, Starting With Samsung and SK Hynix — Seoul Economic Daily, Sept 30, 2026
- Japan-Focused Retail Investors Turn Buyers After 4 Months, Flock to Index ETFs — Seoul Economic Daily, Sept 30, 2026
- Even a 700-Trillion-Won AI Boost Isn't Enough: Kospi Falls for a Third Day — Seoul Economic Daily, Sept 30, 2026
- MSCI Review Countdown: Zero Stocks Currently Qualify for Inclusion — Seoul Economic Daily, Sept 30, 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 #ForeignSelling #SamsungElectronics #SKHynix #Anthropic #MSCI #AIPRISM #SeoulEconomicDaily #WANIFRA

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00:02You're listening to AI Prism from Seoul Economic Daily.
00:06Foreign investors just sold over $21 trillion of Korean stocks in September alone,
00:12their fifth straight month of selling. Korean investors who'd been dumping Japanese stocks
00:18for three months just flipped to buying, and they're piling into index ETFs. Anthropic's
00:25$700 trillion one AI spending plan briefly lifted Korean chip stocks today, but it wasn't
00:31enough to stop a third straight day of losses. And for the first time in a while, not a single
00:37stock qualifies to join Korea's MSCI index at the next review. It's Thursday, October 1st.
00:45Here's what today's story could mean for the Korean market. Rising US bond yields are driving
00:51sustained foreign selling of Korean chip mega caps, even as the one has strengthened back
00:58into the 1,300s. Meanwhile, Japan's market is stabilizing after a widely digested Bank of
01:06Japan hike, drawing Korean money back into index tracking funds. And a key US inflation reading
01:13came in below forecast today, adding fresh uncertainty around the Fed's next move.
01:19Here's what the numbers show. Foreign investors sold a net 21.51 trillion one of Kospi stocks in
01:26September, extending their selling streak to a fifth straight month for a cumulative 134.92 trillion
01:34one, with Samsung Electronics and SK Hynix alone, accounting for 76.6% of the month's net selling.
01:44Korean retail investors turned net buyers of Japanese stocks for the first time in four months,
01:50buying $8.12 million in September versus selling in June, July and August, with index ETFs capturing 77.8%
02:00of that buying, as BOJ rate hike fears eased. The Kospi fell 0.48% to 6,838.04, despite
02:12Anthropik's IPO
02:13prospectus revealing plans for at least $518 billion in AI computing infrastructure spending over the next
02:21decade, as foreign and institutional investors sold a combined $2.82 trillion one. New York Fed
02:30President John Williams said one more rate hike is likely this year, but downplayed urgency for
02:36October, pushing the implied probability of an October hike from about 70% to 50%, with markets now
02:43favoring December. U.S. August core PCE inflation came in at 3.0% annually, below the 3.3%
02:53forecast,
02:54partly due to a methodology change in how software and legal services costs are measured, though the
03:00Fed's preferred inflation gauge still remains well above its 2% target. So what does this mean for
03:08investors watching the board today? Earlier, we said foreign investors sold over $21 trillion one of
03:15Korean stocks in September. Here's what that actually means for you. Rising U.S. bond yields,
03:21not doubts about Korean earnings, are driving most of this selling, since Samsung and SK Hynix's rising
03:28share of the KOSPI makes them the natural target when foreign funds reduce overall emerging market
03:34risk exposure. Watch early October's Korean export data and Samsung's preliminary third-quarter earnings.
03:42Strategists say the real test isn't whether results beat expectations, but whether they lift
03:48next year's earnings forecasts enough to bring foreign buyers back. This is market context,
03:55not investment advice. What to watch? Samsung's preliminary third-quarter earnings release in
04:01early October, and whether it lifts next-year profit forecasts. Whether October's U.S. inflation
04:08and jobs data support a Fed rate hold in October versus a hike in December. And the November MSCI Korea
04:17index review, where no new stocks currently qualify for inclusion given the market's recent weakness.
04:23That's today's AI Prism, stock investors. This episode was produced with AI assistance based on
04:30Seoul Economic Daily reporting and reviewed by a human editor. AI Prism is a Juan Efra award-winning
04:38series. We'll be back tomorrow. You've been listening to AI Prism from Seoul Economic Daily.
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