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Samsung just overtook SK hynix in global DRAM market share, and Korea's new ISA account changes what retail investors can hold tax-free.
Samsung's revenue share in DRAM rose to 39% as standard memory prices outran HBM prices, while SK hynix answered with a new HBF memory standard alongside SanDisk. Separately, Korea's new "productive finance" ISA offers strong tax breaks but restricts new accounts to domestic-only investments, unlike existing ISAs that could hold US ETFs. This episode explains what both shifts mean for anyone holding Korean chip stocks or planning their next ISA contribution.

Sources:
- Samsung Retakes DRAM Market Share Lead From SK Hynix on Commodity Memory Prices — Seoul Economic Daily, August 4, 2026
- SK Hynix and SanDisk Unveil Industry-First HBF Memory Standard — Seoul Economic Daily, August 4, 2026
- Korea's New "Productive Finance" ISA Restricts Investors to Domestic Assets — Seoul Economic Daily, August 4, 2026
- Amazon Joins $3 Trillion Market Cap Club on Cloud Growth — Seoul Economic Daily, August 4, 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:
#RetailInvestors #Samsung #SKHynix #DRAM #ISA #KOSPI #AIPRISM #SeoulEconomicDaily #WANIFRA

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00:10다음 영상에서 만나요
00:33It's Wednesday, August 5th. Let's look at what this means for retail investors in Korea.
00:39Korea's two biggest memory chip makers just posted diverging quarterly outcomes tied to how much of their product mix is
00:46high bandwidth versus standard memory.
00:49Samsung leaned into commodity DRAM just as its price rose faster than premium HBM chips, while SK Hynix's earlier long
00:58-term supply contracts had locked in HBM prices before that rally.
01:03Separately, the government's new Productive Finance ISA is designed to funnel more retail money into domestic stocks, but it comes
01:11with new restrictions on existing accounts.
01:14Here's what the numbers show.
01:17Samsung's DRAM market share reached 39% by revenue in the second quarter, up 6 percentage points from a year
01:24earlier, overtaking SK Hynix for the top spot.
01:28SK Hynix's share fell to 26% from 39% a year ago, while Micron's share rose to 25%, narrowing
01:36the gap to just 1 percentage point.
01:38The shift happened because standard DRAM prices rose faster than HBM prices this quarter, and SK Hynix's earlier long-term
01:47supply contracts had locked in HBM pricing before the broader rally.
01:52SK Hynix and SanDisk jointly unveiled the industry's first HBF, or high-bandwidth flash standard, on August 4th, offering up
02:01to 512 gigabytes of capacity, 8 times next year's HBM4E, at up to 75% of its speed.
02:10Amazon's stock rose 4.58% to $284.02 on August 3rd, lifting its market cap to $3.06 trillion,
02:21a level only four other companies have reached.
02:24Korea's new Productive Finance ISA offers full tax exemption on interest and dividends and a 10% income deduction for
02:33savers aged 15 to 34, but it restricts investments to domestic stocks and funds only,
02:39unlike existing ISAs that could hold U.S.-listed ETFs.
02:44So, what does this mean for retail investors in Korea?
02:47Earlier, we said Samsung took the top spot in global DRAM share.
02:52Here's what that actually means for you.
02:54The leadership swap reflects a product mix shift towards standard memory, rather than a change in AI-related demand.
03:01And SK Hynix's HBM strength and new HBF standard keep it central to the next memory cycle.
03:09If you use an ISA for U.S. ETF exposure, note that only new accounts face the domestic-only restriction.
03:17Existing accounts keep their current investment menu, but face tighter rules on contract extensions and annual contribution carryover.
03:25That's today's AI-PRISM, retail investors.
03:29This episode was produced with AI Assistants based on Seoul Economic Daily reporting and reviewed by a human editor.
03:36AI-PRISM is a won IFRA award-winning series.
03:40We'll be back tomorrow.
03:41You've been listening to AI-PRISM from Seoul Economic Daily.
03:45You've been listening to AI-PRISM from Seoul Economic Daily.
03:46You've been listening to AI-PRISM from Seoul Economic Daily.
03:46You've been listening to AI-PRISM from Seoul Economic Daily.
03:46You've been listening to AI-PRISM from Seoul Economic Daily.
03:47You've been listening to AI-PRISM from Seoul Economic Daily.
03:48You've been listening to AI-PRISM from Seoul Economic Daily.
03:49다음 영상에서 만나요.
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