SK Hynix shares fell more than 10% during Seoul trading on Thursday 15 October 2026, CNBC reported, with rival Samsung Electronics down 7.1% and Japan’s SoftBank Group down 7.9%, as Asian chipmakers extended the losses US technology stocks took the day before.
CNBC tied the declines to “concerns over further Federal Reserve interest rate hikes, financing of artificial intelligence investments”. The figures are intraday: we read CNBC’s article at 01:06 UTC, 10:06 in Seoul, with the Korean market open until 15:30.
Business Pill · FINANCIAL CONDITIONS
A one-minute explainer of financial conditions: how the cost and availability of credit move across markets. It teaches the general idea only and says nothing about any organisation in this story.
The key insight: As we read it, the selloff has moved from the companies that borrow to build AI data centres to the companies that supply the parts: CNBC reported SK Hynix down more than 10% in Seoul a day after CoreWeave closed 15.46% lower in New York.
Update, 16 Oct 2026: China’s main DRAM maker swings to profit
ChangXin Memory Technologies (CXMT, 688825.SH), China’s main DRAM maker, said in a preliminary results notice on 16 October that it expects net profit attributable to shareholders of about 131.0 billion to 132.5 billion yuan for January to September 2026, against a net loss of 5.28 billion yuan a year earlier, IT Home reported. It expects revenue of about 265 billion to 270 billion yuan for the period.
The company attributed the swing to fast-growing demand for AI computing and a DRAM market where products are in short supply and prices have risen sharply. The figures are preliminary and unaudited; the company said its formal third-quarter report will give the final numbers.
Update, 16 Oct 2026, Seoul: the rebound
Seoul stocks opened higher on Friday after Thursday’s fall of more than 7%, Yonhap reported. As of 9:15 a.m. KST, the KOSPI was up 85.62 points, or 1.54%, at 5,639.84; Samsung Electronics was up 1.55% and SK hynix up 0.48%. The won traded at 1,340.6 per dollar, 1.4 won stronger than the previous session’s close.
Yonhap tied the open to Wall Street’s overnight close, where the S&P 500 rose 0.33% and the Nasdaq 0.08% while major AI and chip shares ended lower (our US-close account is in this markets piece), and to the September producer-price print that firmed bets on further Fed hikes. These are opening figures; the session closes at 3:30 p.m. KST. For Nvidia’s view of the credit side, see Jensen Huang on CoreWeave.
At the close: the KOSPI ended Friday up 113.83 points, or 2.05%, at 5,668.05 after touching 5,809.94, snapping a seven-day losing streak, Yonhap reported, citing bargain hunting in the big chipmakers. For the week the index was down 14.46%, according to a TradingKey market report, a decline First Squawk described as its worst weekly performance since October 2008.
Update, 15 Oct 2026: a US fab tied to China tool exports
Reuters reported on 15 October, citing sources, that SK Hynix wants Washington to authorise more exports of US chipmaking equipment to China as a condition for investing in a new US factory. According to the report, the plan centres on its US subsidiary Solidigm installing more tools in unused space at its Dalian NAND facility (Mod B, completed in 2023), with the expanded operations helping to fund a new US NAND plant. Solidigm is also reportedly considering an IPO as early as next year to raise capital for the project.
SK Hynix told Reuters that installation at Mod B is proceeding in consultation with, and under authorisation from, the US government, and that it is not seeking to expand capacity there. Solidigm declined to comment. Reuters gives no investment figure for the US plant. (We read the report via TrendForce’s account of it.)
As we read it, the report puts a financing angle on the sell-off below: on Reuters’ account, the US fab would be paid for in part by capacity in China, which depends on export licences.
CNBC listed the Korean chip-related declines: SK Hynix down more than 10%, Samsung Electronics 7.1%, LG Innotek 8.1%, Seoul Semiconductor 7.7% and Samsung SDI 6.8%.
In Japan, CNBC reported SoftBank Group down 7.9%, chip-testing equipment maker Advantest 6.9%, Tokyo Electron 5.4% and Renesas Electronics 5.4%.
CNBC said investors “grow increasingly concerned that higher borrowing costs could weigh on the massive capital spending required to build out AI infrastructure”.
Asian chip-related share declines on 15 October 2026 as CNBC reported them during the session, read at 01:06 UTC: SK Hynix down more than 10%, Samsung Electronics 7.1%, SoftBank Group 7.9%. Intraday figures, not closing prices.
What Was Posted on X
Elon Musk says memory shortage will get worse in 2027 before China potentially ramps LPDDR production in 2028 but HBM remains โa tougher hill to climb.โ
$MU and $SKHY could see pricing power last much longer than market expects with HBM projected to consume ~30% of DRAM wafer capacity next year.
Investor account Shay Boloor, on 16 October, relayed Elon Musk as saying the memory shortage will get worse in 2027 before China potentially ramps LPDDR production in 2028, with HBM ‘a tougher hill to climb’. The view that Micron and SK Hynix could keep pricing power longer, and the figure of HBM taking about 30% of DRAM wafer capacity next year, are the poster’s.
On 17 October, the account @firstadopter quoted a Wall Street Journal profile of Michael Dell: per the WSJ, Dell says the real bottleneck remains getting enough memory chips to deliver all the AI servers it sells, and that next year, based on what Dell currently sees, ‘It’s gonna get worse.’ It is a buyer-side read on the same memory squeeze behind SK Hynix’s pricing power.
Older DRAM is rising faster than the new stuff. AI demand is the reason.
Barclays reports DDR4 contract prices jumped 24% over the past three months, versus 20% for DDR5. Samsung and SK Hynix are redirecting wafer capacity toward high-bandwidth memory for AI servers. That is tightening supply of the older DRAM. Analysts warn the imbalance could last until 2029, with DRAM demand potentially exceeding supply by up to 13.9% at its 2027 peak.
At SEDEX 2026 in Seoul, both firms showed ideas beyond todayโs high-bandwidth memory. Samsung presented zHBM, a 3D design that stacks memory directly on the processor for up to 8x performance per GPU versus HBM4E, plus a high-layer zNAND-O mockup. SK Hynix unveiled High Bandwidth Flash. It applies the same stacking idea to flash for roughly 10x the capacity of high-bandwidth memory at about half the speed. That fits read-heavy AI inference. With Google and SanDisk, it aims to finalize a standard by January 2027.
AI infrastructure is squeezing conventional memory even as the next designs appear.
$DRAM
— Semiconductor Insider (@SemiconductorsX) Oct 18 11:07
SemiconductorsX posted on 18 October, citing Barclays, that DDR4 contract prices rose 24% over the past three months against 20% for DDR5 as Samsung and SK Hynix redirect wafer capacity to high-bandwidth memory for AI servers. It adds that SK Hynix showed High Bandwidth Flash at SEDEX 2026, with roughly 10 times the capacity of high-bandwidth memory at about half the speed, and aims with Google and SanDisk to finalise a standard by January 2027. The figures are the poster’s, citing Barclays and the RPRNA write-up it quotes.
HBM prices are projected to more than double to ~$35 per GB by 2030 even as shipments nearly quadruple which is unusual for memory where prices typically fall as production scales.
That combination could push HBM market toward ~$640B by 2030 giving $MU and $SKHY an opportunity to benefit from both higher volumes and stronger pricing as HBM4 becomes more complex to manufacture.
Investor account Shay Boloor posted on 18 October a Bloomberg Intelligence chart in which the average HBM price per GB rises to about $35 by 2030 while bit shipments climb steeply. In his words, prices are projected to “more than double” even as shipments “nearly quadruple”, which he calls unusual for memory. The roughly $640B HBM market by 2030 and the read-through for Micron and SK Hynix are his own figures and view, not Bloomberg Intelligence’s chart.
Reuters posted its 19 October report that South Korea says Solidigm’s potential listing could violate dual-listing rules. The Update above quotes the Financial Supervisory Service governor’s remarks from that report.
The Session Before, in New York
CNBC said the Asian moves followed a session in which US technology shares led broader losses after hotter-than-expected inflation data: the Nasdaq Composite closed 1.88% lower at 26,692.87 and the S&P 500 1.11% lower at 7,718.94.
We reported Wednesday’s AI-infrastructure closes from Nasdaq’s official data: CoreWeave 15.46% lower, Dell 11.36%, Nebius 10.08% and Oracle 8.82%. That piece also carries the Bureau of Labor Statistics figure of 3.7% annual inflation in September and CoreWeave’s own 10-Q line of $640 million in quarterly net interest expense against a $626 million net loss.
CNBC also pointed back to Monday, when, it wrote, the chief executives of Broadcom and Intel warned that financing could become a major headwind to the AI boom.
Two Selloffs, Two Stated Causes
This is not SK Hynix’s first sharp drop this week. We reported on 13 October that the Associated Press put SK Hynix down 8.8%, Samsung Electronics down 7.7% and the Kospi down 7.4% during Tuesday’s session.
The reasons given differ. The AP tied Tuesday’s Korean chip declines to reports about China’s CXMT; CNBC ties Thursday’s to interest rates and the financing of AI investment.
The Other Side of the Argument
CNBC quoted Dan Ives of Yorkville Ives, who wrote that “rates are a financing question, not a demand question” and called the pullback a buying opportunity.
Ives named what would change his view: “What would change our view is a demand signal, not a rate signal.” CNBC said he pointed to potential cuts in hyperscaler capital expenditure plans, canceled contracts or falling GPU rental prices as warning signs.
Update, 15 October: At the Close
By the close in Seoul, SK hynix had fallen 11.06% to 1.26 million won and Samsung Electronics 9.48% to 210,000 won, Yonhap reported. The KOSPI dropped 454.59 points, or 7.57%, to end at 5,554.22, after dipping as low as 5,450.81, and fell for a seventh straight session, its longest losing streak since September 2024, according to Yonhap. The figures earlier in this article are intraday, from CNBC’s report as we read it at 10:06 in Seoul.
The selling forced two halts, Yonhap reported. The Korea Exchange activated a sell-side sidecar shortly after the open, suspending program selling for five minutes, and at 12:38 p.m. it activated a circuit breaker, halting trading on the main board for 20 minutes after the KOSPI fell more than 8% from the previous close. It was the ninth circuit breaker the exchange had activated this year, according to Yonhap. Foreigners sold a net 3.62 trillion won of shares, it said.
Yonhap quoted Lee Kyoung-min, an analyst at Daishin Securities: “The KOSPI market came under heavy selling pressure amid concerns over the sustainability of AI-related investments, intensifying competition in memory chip production and rising borrowing costs.”
On exchange price-history data, SK hynix’s highest daily close in the past two years was 2,919,000 won on 22 June 2026. Against Thursday’s close of 1,262,000 won, that puts the stock about 57% below its peak, on our arithmetic. In Tokyo, SoftBank Group closed at 4,852 yen, down from 5,351 yen, a fall of about 9.3%, on our arithmetic from the same data.
As we read it, the close confirmed the intraday picture rather than reversing it. The same session saw TSMC report record third-quarter figures (our TSMC piece) and Gartner warn that more than $3.5 trillion of AI spending could face impairment by 2030 (our Gartner piece).
Update, 17 Oct 2026: BofA’s Hartnett leans risk-off
Bank of America strategist Michael Hartnett is leaning risk-off over the next three to four weeks, according to Seeking Alpha’s report on BofA’s latest Flow Show. Seeking Alpha says he pointed to 3% real yields, conflicts, volatile oil and the rising likelihood of a Democratic sweep in the midterms, with credit default swaps widening across heavy AI spenders and lenders.
Hartnett identified semiconductor prices as the decisive indicator, the report says: continued gains would confirm that AI spending remains intact, while “A resumed rollover in chip prices, however, would signal tightening credit and an early peak in infrastructure spending”. BofA’s October Fund Manager Survey showed the heaviest tech overweight since August 2020, according to the report.
Update, 18 October: SK hynix Weighs a US Listing for Solidigm
While its shares were swinging on AI funding fears, SK hynix was also weighing whether to take Solidigm, its US NAND flash subsidiary, public in the United States. The Korea Herald reported on 11 October, citing investment banking sources, that Solidigm had held meetings with several investment banks to discuss underwriters for a potential US listing, and that market watchers estimate it could be valued at up to $150 billion and raise as much as $15 billion. SK hynix said it was exploring ways to strengthen Solidigm’s competitiveness but had made no final decision, the paper said.
Solidigm was set up in December 2021 after SK hynix bought Intel’s NAND flash and solid-state drive business for $9 billion. After combined net losses of more than 7 trillion won in 2022 and 2023, it posted first-half 2026 revenue of 12.25 trillion won ($9.1 billion), up 265% from a year earlier, and net profit of 5.84 trillion won, according to the Korea Herald. An analyst quoted by the paper put Solidigm at about 9.3% of SK hynix’s consolidated revenue and 5.9% of its consolidated operating profit in the first half.
The plan has split investors. Supporters argue a separate listing could make the market price the NAND business that HBM and DRAM have overshadowed. Critics say SK hynix shareholders financed the acquisition and the downturn, and a listing could shift future growth away from them. “Solidigm’s current contribution to SK hynix’s operating profit does not mean it will remain at that level,” Lee Young-gon, head of research at Toss Securities, told the paper. The Korea Herald also noted that overseas listings are not subject to the Korea Exchange’s prior review of subsidiary listings, and that SK hynix’s two disclosures since August said only that it was “reviewing various options.” Korean outlets including Chosun Ilbo and Aju Press carried the double-listing debate again on 17 and 18 October.
Update, 19 October: Korea’s Regulators Say a Solidigm IPO Could Breach Dual-Listing Rules
South Korea’s financial regulator said on Monday that SK Hynix’s potential listing of its US unit Solidigm could violate restrictions on dual listing, Reuters reported. Financial Supervisory Service Governor Lee Chan-jin told a parliamentary hearing that regulators were looking into whether a Solidigm initial public offering in the United States would require a review under domestic rules, according to Reuters.
“We keep monitoring the issue … both the Financial Services Commission and ourselves judged that it is a violation of [rules on] dual listing,” Lee said, Reuters reported, when a lawmaker asked how regulators would protect minority shareholders in SK Hynix if Solidigm went public. He added: “The FSC has been waiting for an official interpretation of the rules on whether the issue is subject to filing for domestic securities registration.”
Reuters also recalled that it reported in September that Solidigm is considering an IPO as early as next year that could value the unit at up to $150 billion, and that South Korean regulators unveiled tighter rules in July under which boards must obtain minority shareholders’ consent before listing a unit in South Korea or overseas. SK Hynix said earlier this month it would evaluate measures to protect its shareholders, Reuters wrote, and was not immediately available to comment.
As we read it, the regulator’s view moves the shareholder-value debate in the 18 October update from investors to the supervisors, though by Lee’s account the FSC is still waiting for an official interpretation of the rules.
The Structural Read
As we read it, the stated driver is the cost of money, not demand: CNBC tied the move to rate-hike and AI-financing worries, and the analyst it quoted, Dan Ives, said “rates are a financing question, not a demand question”.
As we read it, memory makers sit downstream of the financing: if borrowing costs rise for the builders, the order books of chip suppliers are what investors are pricing, even though no source we read reports a change in SK hynix’s orders.
As we read it, the contrast with private markets is sharp: on the same day, we reported Anthropic telling investors its third-quarter revenue was $16.8 billion, per the FT and Reuters, while public AI-hardware shares fell.
Dan Ives, Yorkville Ives, as quoted by CNBC
“Higher yields raise the cost of financing these builds, and investors are right to focus on balance sheets and contract structure, but rates are a financing question, not a demand question”
Three Implications
SK HYNIX Its shares fell more than 10% during Thursday’s session, CNBC reported, after an 8.8% drop on Tuesday that the AP tied to reports about China’s CXMT.
AI-INFRASTRUCTURE BORROWERS CoreWeave’s 10-Q shows $640 million of quarterly net interest expense against a $626 million net loss, as we reported; CNBC said investors are focused on borrowing costs.
INVESTORS Ives listed the signals that would change his view: cuts to hyperscaler capital expenditure plans, canceled contracts or falling GPU rental prices, per CNBC.
The framework puts it this way: “It is a sovereign-scale financing problem dressed in tech-company clothing — and the financial architecture is starting to invert.”
As we read it, this week’s moves are that financing question showing up in prices: lenders repriced CoreWeave’s debt, and chip suppliers’ shares followed in Asia.
The US session before the Asian declines: Wednesday’s closes from Nasdaq’s official data, as we reported them. CoreWeave 15.46% lower, Dell 11.36%, Nebius 10.08%, Oracle 8.82%.
What Is Not Established
These are intraday moves reported partway through the Seoul and Tokyo sessions; the closing figures may differ. SK hynix has not commented in anything we read, and CNBC’s account of the cause is its own reading of market sentiment, not a company statement.
No source we read links SK hynix’s orders, prices or customers to the decline.
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SK Hynix fell more than 10% intraday on 15 October 2026, CNBC reported, the second sharp drop in three sessions; CNBC tied this one to interest-rate and AI-financing worries that had hit US AI-infrastructure shares the day before.
A note on sourcing. CNBC reported the Asian chip-stock declines on 15 October 2026; we read its article in full at 01:06 UTC (10:06 in Seoul), while the Korean and Japanese markets were open, so every Asian figure here is intraday and may differ from the close. The US closing figures, the inflation figure and CoreWeave’s interest line come from our own earlier reporting, which cites Nasdaq’s official closing data, the Bureau of Labor Statistics and CoreWeave’s 10-Q. SK hynix had not commented in anything we read. The Solidigm update relies on the Korea Herald’s 11 October report, read in full on 18 October; we could not read the Chosun Ilbo and Aju Press follow-ups, so nothing in it is drawn from them. The closing figures, the sidecar and the circuit breaker come from Yonhap’s closing report and its circuit-breaker report, both read in full after the 3:30 p.m. close in Seoul; the drawdown and SoftBank figures are our arithmetic on exchange price-history data (Yahoo Finance and Naver Finance show the same 22 June 2026 high close). The 19 October update relies on Reuters’ report of the Financial Supervisory Service governor’s remarks, read in full through its syndication by CNA; we did not see a transcript of the hearing.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
