Micron shares fall 7% as memory-chip peers and China worries weigh
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The gist
US memory chipmaker Micron closed down 7% at $795.23 while the S&P 500 gained 1.58%.
The AI-driven stock is down about 18% in a month, testing its margins.
Background
Micron Technology is a US memory chipmaker (NASDAQ: MU) that makes DRAM, NAND and NOR flash memory, including high-bandwidth memory used in AI systems. Its shares had topped a $1 trillion market value for the first time in May 2026 and more than tripled over the past year on AI data center demand, but have shed nearly 20% since early October. The recent slide has come alongside cautious signals from other memory makers and questions about whether its exceptional margins can hold ahead of the next quarterly report expected in December 2026.
How it unfolded
- May 26, 2026Micron topped a $1 trillion market value for the first time as shares popped 19%; UBS tripled its price target from $535 to $1,625 a share.
- Jun 24, 2026Micron reported strong earnings and outlook; the stock later sank 22% from the highs made after that report.
- Sep 30, 2026Micron reported Q4 FY2026 revenue of $54.23 billion, up 379.3% year over year, with an adjusted gross margin of 87%, and forecast Q1 FY2027 revenue of $61.5 billion, plus or minus $1.5 billion.
- Oct 22, 2026Micron fell about 6% as another AI sell-off hit chip stocks, the same day it held a technology webinar for analysts.
- Oct 26, 2026Elon Musk posted on X that the memory humanoid robots need "will exceed everything else on Earth"; Micron shares rose about 2.5% after the remark.
- Nov 3, 2026A cautious forecast from Japan's Kioxia Holdings turned an overnight gain in Micron into a loss; the stock was at $853.34, down 4% that afternoon and 20% over the past month.
- Nov 4, 2026Micron closed down 7% at $795.23 while the S&P 500 gained 1.58%, the Dow 3.03% and the Nasdaq 1.44%; shares had lost 18.22% in the past month.
- Nov 5, 2026Micron traded at just 12 times earnings and 8 times sales; a DCF estimate put its intrinsic value broadly in line with the $795.62 share price.
Key terms
- S&P 500
- A stock market index tracking the performance of 500 large US companies listed on American exchanges.
- DRAM
- A type of semiconductor memory that stores each bit in a cell made of a capacitor and a transistor, and loses data without power.
- NAND
- A type of flash memory named after the NAND logic gate, used for non-volatile data storage.
Source: Wikipedia
Who’s saying what
- Bulls
- D.A. Davidson analyst Gil Luria kept a Buy rating and a $3,000 price target after the Oct. 22 drop, arguing AI should drive memory demand for three to five years, helped by longer customer commitments.
- Caution
- A cautious forecast from Kioxia Holdings, Japan's largest memory chipmaker, pulled memory stocks lower, and Samsung missed profit expectations in a weak prior session.
- Analysts
- A DCF estimate put Micron's intrinsic value broadly in line with its current share price, while coverage noted the stock trades at 12 times earnings and 8 times sales.
Still unverified
China's CXMT and its claimed breakthrough in advanced DRAM design are cited as an ongoing source of anxiety weighing on investor confidence in the memory chip sector.