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Korea's stock market just posted its lowest trading volumes of the year — and Samsung and SK Hynix are suddenly telling two different HBM stories.
The Kospi edged up 0.46% to 6,820.02 while trading value and investor deposits sank to their weakest levels this year, as Fed Chair Kevin Warsh's hawkish Jackson Hole remarks pushed September rate-hike odds above 59%. Foreign investors extended their selling streak to a fourth straight month. Meanwhile, brokerages are diverging sharply on Samsung Electronics versus SK Hynix, with Samsung's HBM4 yield gains prompting a target-price upgrade even as SK Hynix's target was cut. In the background, HBM export prices broke $70 per unit for the first time as long-term supply contracts tighten the spot market.

Sources:
- Foreign Selling and Record-Low Trading Value Hit Rate-Sensitive Biotech and Brokerage Stocks — Seoul Economic Daily, Aug 31, 2026
- Second Wave of Memory Shortage Sends HBM and DRAM Prices Higher Again — Seoul Economic Daily, Aug 31, 2026
- HBM Market Shifts as Samsung and SK Hynix Outlooks Diverge — Seoul Economic Daily, Aug 31, 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 #SamsungElectronics #SKHynix #HBM #FedRateHike #StockMarket #AIPRISM #SeoulEconomicDaily #WANIFRA

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00:02You're listening to AI Prism from Seoul Economic Daily.
00:30And HBM export prices just broke $70 for the first time ever.
00:35It's Tuesday, September 1st.
00:38Here's what today's story could mean for the Korean market.
00:42Fed Chair
00:44Kevin Warsh's hawkish Jackson Hole remarks reignited rate hike fears
00:48just as the Kospi remained stuck in a narrow box after July's 22% plunge.
00:53Rate-sensitive biotech and brokerage names took the hardest hit as a result.
00:58Trading activity and investor deposits have both thinned out sharply.
01:03A signed conviction is draining from the market ahead of the September Fed meeting.
01:07Here's what the numbers show.
01:09The Kospi closed at 6,820.02, up 0.46%,
01:15while the COSDAC slipped 0.49% to 834.29% as rate-sensitive biotech and brokerage names led losses.
01:26August's average daily trading value came in at $25.75 trillion, roughly half of June's $50.35 trillion peak.
01:35And investor deposits fell below $100 trillion for a third straight day.
01:40Warsh's hawkish remarks pushed September rate hike odds from 35% to 59.7%, with the next FOMC decision due
01:50September 15th to 16th.
01:53Foreign investors sold a net $10.17 trillion in August, extending their selling streak to a fourth straight month.
02:01Samsung Electronics gained 1.18% over the past month, while SK Hynix dropped 8.98%.
02:09As LS Securities raised Samsung's target price, 12.5% to $450,000, won and cut SK Hynix's target 27
02:19.3% to $2.4 million.
02:23HBM export prices jumped 9.5% to $76.13 per unit in July, the first time above $70.
02:33Even as export volumes fell 27.3% on long-term supply contracts, squeezing spot availability.
02:41So, what does this mean for investors watching the board today?
02:45Earlier, we said Samsung and SK Hynix are moving in opposite directions.
02:50Here's what that actually means for you.
02:53The market is repricing who captures more of next year's HBM4 upside, with Samsung's yield improvement narrowing the premium that's
03:01long-favored SK Hynix.
03:02Watch the September 15th to 16th FOMC decision and the jobs and inflation data landing before it.
03:11They'll decide whether the COSPI can break out of its box or stays pinned until foreign selling eases.
03:18This is market context, not investment advice.
03:22Position sizing and timing are your call.
03:25What to watch.
03:27The September 15th to 16th FOMC decision, where a hike would likely keep any COSPI rebound on hold.
03:35August's non-farm payrolls and CPI data due before that meeting.
03:40And whether Samsung's HBM4 yield gains keep pressuring SK Hynix's profit estimates and valuation premium.
03:48That's today's AI prism, stock investors.
03:52This episode was produced with AI assistance based on Seoul Economic Daily reporting and reviewed by a human editor.
04:00AI prism is a Juan Efra award-winning series.
04:04We'll be back tomorrow.
04:05You've been listening to AI prism from Seoul Economic Daily.
04:10Meet by Mr. Spellbox.
04:10Morning.
04:11We'll be back tomorrow.
04:12.
04:12다음 영상에서 만나요.
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