Micron (MU) Stock Hits All-Time High as Memory Chip Rally Goes Parabolic

TLDR

• Micron’s stock surged nearly 38% this week — its best weekly gain since December 2008.
• The stock closed Friday at $746.81, up over 15% on the day alone, hitting a new all-time intraday high of $712.82.
• Micron’s market cap topped $840 billion, overtaking JPMorgan Chase.
• The rally is driven by a global memory chip shortage that has pushed prices and margins higher.
• Micron’s 2026 production capacity is completely sold out.

Micron Technology (MU) had a week that will be talked about for a while.

The stock closed Friday at $746.81, up more than 15% on the day. For the week, MU gained nearly 38% — its best weekly performance since December 2008, when it was trading below $5 a share coming out of the Great Recession.

Micron Technology, Inc., MU

That’s not a typo.

The stock is up roughly 147% year to date and has surged over 84% in the past month alone. Micron’s market cap now sits above $840 billion, putting it ahead of JPMorgan Chase. It took Micron over 41 years to build its first $200 billion in market value. It added that same amount in a single week.

The stock hit a new all-time intraday high of $712.82 on Friday, based on data going back to 1984.

What’s Driving the Rally

The short answer: a global shortage of memory chips.

Demand for DRAM and NAND — the two main types of memory — has exploded as hyperscalers pour money into AI data centers. Total capex from the big cloud players could surpass $1 trillion by the end of next year, according to estimates from Bank of America and Evercore.

Micron, Samsung, and SK Hynix together produce more than 90% of the world’s DRAM. That concentrated supply, combined with surging demand, has given memory makers serious pricing power.

Micron’s 2026 capacity is completely sold out.

Mizuho analyst Vijay Rakesh noted that Micron “remains well positioned across the memory landscape with leading edge DRAM nodes helping drive cost-downs year-over-year.”

The enthusiasm isn’t limited to Micron. AMD gained 26% on the week, touching a new 52-week high. Intel jumped 25% and has more than doubled over the past month. Sandisk was up over 16% on Friday.

Retail Investors Are Paying Attention

Retail trading in Micron has picked up sharply. Net buying hit its highest level in two years in mid-April, according to Vanda Research.

Samsung joined the trillion-dollar valuation club this week. SK Hynix is reportedly fielding investment offers from global tech firms looking to fund new memory production lines.

On recent earnings calls, companies from Meta Platforms to CoreWeave have pointed to rising component costs as a reason for increased spending — a direct consequence of the shortage.

Not everyone is convinced the momentum is permanent. Carolyn Bell, lead portfolio manager at Stonehage Fleming, called it a cyclical phenomenon tied to the current phase of data center construction. Others on Wall Street argue Micron is being repositioned as a high-growth AI infrastructure play rather than a traditional cyclical chip stock.

Micron now ranks as the 12th largest U.S. company by market cap, just behind Eli Lilly at $900 billion.

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