Samsung posted the largest quarterly profit in its history, yet its forecasts beat could not hold the memory trade together. A fresh chip sell-off and an oil shock have taken over the tape, just as SK Hynix prices a record US$29 billion IPO listing into the United States markets.
Three sessions have carried the AI-memory trade from a record high to a jittery retreat, and the reversal owes less to the earnings than to everything that surrounded them.
On Monday the Dow Jones Industrial Average closed above 53,000 for the first time, with chip stocks leading a broad advance on renewed faith in artificial intelligence.
By Tuesday that faith had thinned, after Samsung's record quarterly profit beat the average forecast but fell short of the most optimistic estimates, and a report that China's DeepSeek is building its own artificial intelligence chip revived an old question about how much silicon the boom really needs.
Then on Wednesday the story changed shape, as the collapse of the U.S.-Iran ceasefire sent oil sharply higher and pulled the blue-chip index lower.
The apparent tale is a chip market losing its nerve, but the earnings underneath remain historically strong, which points to a repricing of the memory thesis rather than a break in it.
That distinction is about to be tested in public, because SK Hynix prices the largest listing of the year on Thursday and begins trading on Friday.
New rcords and China worry
Samsung's preliminary operating profit of 89.4 trillion won ($58.4 billion) was the biggest three-month figure in the group's history and a rise of more than 19 times on a year earlier.
It cleared the 84.4 trillion won consensus compiled by FnGuide, yet it came in below the top of the brokerage range and beneath the pre-provision number some desks had hoped for, and in a market priced for perfection that shortfall was enough.
The reaction was swift, and South Korea's Kospi fell almost 5% before the selling washed into U.S. trading.
Micron dropped 4.7% and the VanEck Semiconductor ETF slid more than 3%, which is what a record profit can do when the tape has already banked the good news.
The report that DeepSeek is designing its own chip landed on an AI trade already nervous about its own scale.
That unease had surfaced earlier this month when Meta set out a plan to resell surplus computing power, read by some as a hint of overbuilding rather than scarcity.
Beneath both sits a concentration problem, with JPMorgan estimating that AI memory already absorbs about 52% of cloud providers' capital spending, a share it expects to climb above 70% next year.
A credible new chip designer, arriving just as that spending is being questioned, makes the memory makers' order books look a fraction less untouchable.
Oil takes over the tape
By Wednesday the market had a larger problem than chips.
President Trump declared the ceasefire with Iran over and threatened to strike the country again and reimpose a naval blockade, following U.S. attacks on more than 80 targets and fresh assaults on tankers near the Strait of Hormuz.
With the Treasury having already revoked Iran's authorisation to sell oil, the escalation sent West Texas Intermediate up 4.4% to $73.52 and Brent up 5.4% to about $78.
The shock split the market, dragging the Dow down more than 1% on oil-sensitive and industrial names while the Nasdaq edged up 0.2% to 25,870.65 and the S&P eased to 7,482.71.
For a memory trade already on the back foot, an energy-led inflation scare is an unwelcome second front.
SK Hynix meets the storm
Into this jumpy tape steps the year's biggest listing.
SK Hynix, which holds close to 60% of the high-bandwidth memory market, prices its roughly $29 billion depositary receipt sale on Thursday, at an indicative price near $165 a receipt, and starts trading on Friday under the ticker SKHY.
At that size it would rank as the second-largest share sale on record, behind only SpaceX, and demand has run ahead of the deal, with Baillie Gifford, Coatue and Situational Awareness Partners together indicating interest of up to $7 billion.
The timing is the story in itself, since the largest depositary offering ever attempted is arriving in the same week the memory trade lost its footing and oil caught fire.
The debut will reveal more about global appetite for AI memory than any single earnings line, because it prices the thesis in real time rather than in a forecast.
What to watch:
- SK Hynix's first day of trading on Friday, and any arbitrage between the Nasdaq receipts and the Seoul-listed shares.
- Samsung's full second-quarter results later this month and SK Hynix's own Q2 report on 29 July, for the divisional and HBM detail the previews left out.
- Any Iranian move to close the Strait of Hormuz, and the transit counts that would signal it.
- The third-quarter DRAM and NAND contract talks, where increases above 20% are being sought, as the cleanest read on whether the shortage still holds pricing power.
