Micron Stock Falls Below $1,000 After CXMT Server Memory Claim: What Happened

Micron fell 3.9% on Oct. 12 and closed below $1,000 after China's CXMT said it plans a denser server memory chip by year-end. Here is where the stock stands, what its last quarter showed, and why the reaction was about more than CXMT.

Micron Technology shares fell 3.9% on Monday, Oct. 12, closing at $989.04 on the Nasdaq after Chinese memory maker ChangXin Memory Technologies, or CXMT, laid out plans for a denser server memory chip by year-end. The Micron stock CXMT reaction was steeper than the drops in Nvidia, AMD and Broadcom that day, though storage maker SanDisk fell further, and it came on top of a week of worry about AI spending.

Where it stands: Monday’s $989.04 is Micron’s latest close, down from $1,029.00 the previous Friday, according to Nasdaq data. Overnight in Seoul, SK hynix was down 8.79% and Samsung Electronics 5.99% as of 3 p.m. Tuesday, The Korea Herald reported.

What Micron and US chip stocks did on Oct. 12

The move started before the bell. Micron was “down more than 2% in premarket trading on Monday” after the CXMT news, CNBC reported. (Premarket trading is the session before the regular 9:30 a.m. Eastern open.) By the close, CNBC said, Micron’s 3.9% drop had weighed on the Nasdaq Composite, which lost 0.44% to 27,245.90, as investors sized up growing competition from CXMT.

The selling was concentrated in memory. SanDisk, which makes flash storage, fell 5.97%, The Herald Business reported. The Philadelphia Semiconductor Index, a benchmark of US-listed chip stocks often called the SOX, dropped 2.67%, according to Korea JoongAng Daily. The Associated Press had Nvidia off 1.3%, Broadcom 1.9% lower and AMD 2.3% lower, all smaller declines than Micron’s. A fund that holds memory makers, the Roundhill Memory ETF, was down about 4% in the morning, which 24/7 Wall St. said showed the selling had spread across the group.

The wider market barely moved. The S&P 500 slipped 0.06% and the Dow Jones Industrial Average rose 0.38%, according to CNBC and The Herald Business.

Where Micron sits against its 2026 record

This was not a fall from a peak. Micron’s record close this year was $1,213.56 on June 25, the same day it hit an intraday high of $1,255.00, according to Nasdaq exchange data. By our arithmetic, Monday’s close leaves the stock nearly a fifth below that record, but still more than three times the $285.41 it closed at on the last trading day of 2025. Mid-morning on Monday, 24/7 Wall St. put the year-to-date gain at 245%.

The ride has been bumpy. In July alone the stock fell 26.5% while still being up 197% for the year, MarketWatch noted at the time. Monday’s close was also not the first dip below $1,000 since the summer: Micron closed at $977.50 on Sept. 17 before climbing back to $1,015.80 the next day.

Checkpoint Micron close
Dec. 31, 2025 (year start) $285.41
June 25 (record close) $1,213.56
Sept. 17 $977.50
Fri., Oct. 9 $1,029.00
Mon., Oct. 12 $989.04

For the setup heading into the most recent earnings report, see what investors were watching before Micron’s fiscal Q4 report.

What Micron’s latest quarter showed

Micron reported results on Sept. 30 for its fiscal fourth quarter, in a release filed with the Securities and Exchange Commission. Revenue was $54.23 billion, against $11.32 billion in the same quarter a year earlier. Revenue for the full fiscal year was $133.19 billion. Non-GAAP net income, which strips out some one-time items, was $38.40 billion, or $33.42 per diluted share.

Gross margin is the share of revenue left after the direct cost of making the chips. On a non-GAAP basis it was 87.0% in the quarter, up from 45.7% a year earlier, and Micron guided to about 86.25% for the current quarter, with revenue of $61.5 billion ± $1.5 billion. “Micron delivered record fiscal 2026 results, and we expect an even stronger fiscal 2027,” Chief Executive Sanjay Mehrotra said in the release.

Item (fiscal Q4 2026) Figure
Revenue $54.23 billion
Same quarter a year earlier $11.32 billion
Non-GAAP gross margin 87.0%
Full fiscal-year revenue $133.19 billion
Next-quarter revenue guide $61.5 billion ± $1.5 billion

Data centers drive those numbers. In the filing’s business-unit table, which is in millions of dollars, Core Data Center revenue was $18,002 and Cloud Memory revenue was $16,283, the two largest of Micron’s four units. That is the part of the business CXMT says it is aiming at.

The Micron stock CXMT overlap: server DDR5

Speaking in Shanghai on the weekend, CXMT’s president, Cao Kanyu, said the company had made “key progress” on 4F2 DRAM, a layout that squeezes memory cells into less space; in theory each cell is about 33% smaller, Korea JoongAng Daily reported. DRAM is the working memory in computers and servers. CXMT says it will use the design in a next-generation DDR5 RDIMM, the plug-in memory module used in data-center servers, by the end of 2026, Global Times reported. Global Times described it as CXMT’s attempt to break into server memory.

That is a product Micron already sells and is upgrading. In its Sept. 30 release, Micron said it had begun sampling “the industry’s first 512GB ultra dense high-capacity DDR5 RDIMM modules capable of speeds up to 9,200 MT/s” and had completed multiple customer qualifications of faster server RDIMMs. Sampling means sending test parts to customers; qualification means a customer has tested and approved them.

Servers are now most of the DRAM market. TrendForce analyst Wang Yuqi told Yicai, in a piece republished by the Shanghai Stock Exchange, that 60 percent to 65 percent of DRAM demand is tied to servers. High-bandwidth memory (HBM), the stacked memory packed beside AI processors, is a different contest. Micron held an 18% share of it in the second quarter to SK hynix’s 50%, Edaily reported. CXMT will make HBM, MST Financial analyst David Gibson told CNBC in July, but its yields “will be low and hence volumes low.” For more on how those memory types differ, see our guide to LPDDR versus HBM demand.

What the skeptics say about CXMT

CXMT’s plan is a claim, not a product on shelves. Korea JoongAng Daily reported that the company disclosed no product specifications, yields, die sizes, power figures, production capacity or customer test results. 24/7 Wall St. noted that the server product “remains a stated target with nothing shipping yet,” and said the next signal is whether it ships and wins customer qualification.

Chung In-sung, a former SK hynix researcher, told JoongAng: “Even if CXMT manages to develop a 4F² product by the end of the year, it remains questionable whether the company can produce enough chips to have a meaningful impact on the market.” CXMT has also missed timelines before. In 2022 it was reported to be aiming for mass DDR5 production by year-end, yet DDR5 products with its chips did not show up in earnest until late 2024, JoongAng noted.

There are physical limits too. CXMT is cut off from the newest EUV lithography tools, so it has to use about 30% more wafers than rivals for the same amount of memory, Gibson said in the same CNBC interview. On price, CXMT has not been undercutting the market: The Korea Times, citing SemiAnalysis, reported that its DRAM prices were only 5 to 10 percent below those of Samsung, SK hynix and Micron in the first quarter.

Micron has not, as far as we could find, commented on CXMT’s plan. On the Sept. 30 earnings call, Mehrotra said “in calendar year 27 as well as 2028, we see demand exceeding supply,” according to 24/7 Wall St. That comment was about overall memory demand, not a response to CXMT.

It was not only CXMT

Chip stocks were already shaky. On Thursday, Oct. 8, the Financial Times reported that OpenAI’s annualized revenue was “approaching $50 billion (€44.6bn)” at the end of September, according to Euronews, which described that as $20 billion below earlier estimates. That day the Nasdaq fell 1.25% and the semiconductor index sank 3.4%. The Korea Times later wrote that the gap “reflected different accounting methods rather than a drop in sales,” but the episode revived doubts about how much AI companies can keep spending on chips. Our earlier coverage of how Oracle, CoreWeave and Nvidia reacted to the OpenAI report has the details.

In Seoul, iM Securities analyst Yang Hyun-kyung listed the mix plainly to Financial News: worries about financing and profits for AI infrastructure, CXMT catching up technologically, and pressure from foreign selling. The Korean side of the story is in our timeline of the Oct. 13 KOSPI plunge.

What CXMT would need to show

Volume is the open question for CXMT. The Korea Times reported that CXMT intends to add 100,000 wafers a month of Shanghai capacity during 2027, with a further 100,000 slated for 2028, and that Nomura Securities and other observers expect its monthly capacity to reach about 550,000 wafers by the end of 2028.

Frequently Asked Questions

Why did Micron stock fall on October 12?

CNBC tied the drop to a report that China’s CXMT had made progress on a denser memory-cell design and plans a server memory product built on it by the end of 2026. Micron fell 3.9% and closed at $989.04. The selloff came days after a separate report on OpenAI revenue had already hit chip stocks.

Is Micron stock at a record high?

No. Micron’s record close was $1,213.56 on June 25, according to Nasdaq data. Its Oct. 12 close of $989.04 was well below that, though still far above the $285.41 it closed at on the last trading day of 2025.

What is CXMT?

ChangXin Memory Technologies is China’s leading DRAM maker. It is listed in Shanghai, not in the US. Financial News reported that Counterpoint Research gave CXMT a 10% share of DRAM revenue in the April-to-June quarter.

Does CXMT compete with Micron in AI memory?

Not much in high-bandwidth memory yet, where analysts say CXMT is behind. The new plan targets conventional server memory, the DDR5 RDIMM modules that Micron already sells and is sampling in new versions. CXMT has not disclosed specs, yields or customers for its product.

What did Micron say about competition?

We found no Micron statement responding to CXMT. On its Sept. 30 earnings call, CEO Sanjay Mehrotra said Micron sees demand exceeding supply in calendar 2027 and 2028, as quoted by 24/7 Wall St.

Sources

This article is for general information only and is not investment, tax or legal advice. Life Stonks does not recommend buying or selling any security, and nothing here predicts what any market or stock will do. Intraday market figures change through the trading day; the times and sources are given where each figure appears. Talk to a licensed professional before making a financial decision.