· by The Reader
SKHY memo (neutral 55), Oct 23, 2026
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Summary
SK hynix is five days from a Q3 2026 earnings call and nothing I retrieved this session contains a revenue, margin or HBM volume figure, so the fundamental case is unverified. The stock has fallen from 195.13 on October 2 to 137.02 on October 23, and the only company documents on file in that window are 6-K rumor clarifications, not results.
Variant view
The market is treating the October selloff as a regime change in memory: Chinese capacity, a rate driven AI derating, and a shelved subsidiary IPO all landing in three weeks. I do not have the evidence to disagree or agree. The documents I could read say only that Solidigm's pre-IPO raise is dead and that a Japan fab is under review with nothing decided, which is thin ground for either a bullish or a bearish call ahead of the October 28 call.
Evidence
The Form 6-K furnished October 23, 2026 is a clarification, not a results release. It states that Solidigm, the US subsidiary, had been reviewing financing measures to expand production capacity, and that after considering capital market conditions it has decided to discontinue its review of pre-IPO capital raising and IPO plans. Press coverage frames this as abandoning a roughly 10 billion dollar listing. The filing itself gives no financial detail and no reason beyond capital market conditions.
I pulled the results section of that 6-K and it returned zero characters. The full text is 1,813 characters and is signed by Seonghwan Park, Head of Investor Relations. There is no income statement, no HBM commentary and no guidance in any filing I retrieved. The third quarter 2026 conference call is set for October 28, 2026 per the October 14 6-K and secondary coverage.
The price action is the loudest fact. Closes went 195.13 on October 2, 170.50 on October 8, 147.55 on October 14, 131.69 on October 22, and 137.02 on October 23. That is a 30 day change of minus 26.48 percent against a 52 week high of 198.63 set on September 9. The 52 week low is 126.79, so the stock sits about 8 percent above it.
A dated catalyst exists for the October 12 to 14 leg down. TrendForce reported on October 12 that CXMT is accelerating a 4F2 DRAM push with a year end server DDR5 RDIMM launch, and contemporaneous coverage tied a roughly 4 percent drop in Micron and SK hynix shares to it. This is a commodity DRAM cost curve story, not yet an HBM story, but I have no retrieved data on how much of SK hynix profit comes from conventional server DRAM versus HBM.
The September 18 6-K responds to a Korea Exchange inquiry about building a semiconductor facility in Japan. The company says it is reviewing various measures including additional production bases and that no matters have been determined. Two capacity and capital decisions are therefore open: Solidigm funding is now off the table, and Japan remains undecided. That is a capital allocation picture in flux going into a print.
Bear case
The bear case is coherent and partly documented. Chinese supply is moving up the stack, with CXMT targeting server DDR5 RDIMM by year end, which pressures the conventional DRAM half of the business that is not protected by HBM qualification. Pulling the Solidigm raise removes an external funding route for NAND capacity at the same time the company is weighing a new Japanese fab, so capital intensity may land on the parent balance sheet. A 31 percent drawdown in a month in a stock with 80 on the AI exposure scale is how memory cycles usually turn.
What would change my mind
First, the October 28 Q3 2026 call: an HBM bit shipment and 2027 supply commitment disclosure, with operating margin, would let me take a side rather than stand aside. Second, a filing or disclosure resolving the Japan fab review and the post Solidigm funding plan, since a large unfunded capex commitment into a softening conventional DRAM price would turn me negative.
Market data as of the close on . Prices are end of day, not live.
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