Micron Reclaims $800 With 11.89% Surge After CoreWeave Eases AI Demand Fears

Micron Technology (NASDAQ:MU) closed at $811.30 on Wednesday, November 11, 2026, up $86.19, or 11.89%, recording its biggest one-day gain since July 30 and its first close above $800 since November 3. The surge marks a sharp reversal for a stock that had just endured one of its worst sessions of the year, and it signals how tightly memory-chip makers are now coupled to every headline about AI computing demand.

The rebound matters beyond one ticker. Micron finished the session worth $917.92 billion, above the $911.91 billion market value of JPMorgan Chase (NYSE:JPM), which closed at $343.39, up 0.39%. A memory manufacturer valued above the largest US bank tells investors how much future AI spending is already built into Micron's share price, and how quickly sentiment in the memory sector can swing in both directions.

What happened on November 11?

The stock traded between $763.05 and $827.58 during the session before settling at $811.30. The gain was the largest since July 30, when Micron rose 18.36% in a single day. The November 11 close was the first above $800 since November 3, when the stock finished at $855.10.

The rally came exactly one week after a bruising stretch. Micron closed at $795.23 on November 4, then fell 17.46% to $656.39 on November 5 during a broad AI and chip selloff. It recovered to $725.11 by November 10 before the November 11 surge. The latest close sits about 23.6% above the November 5 low but remains about 33% below the record close of $1,213.56 set on June 25.

That gap frames the key question for investors: whether the underlying business supports the recovery, or whether the stock is simply repricing with every shift in AI sentiment.

What moved memory stocks that day?

Market coverage linked the rally to the third-quarter report from CoreWeave (NASDAQ:CRWV), released on November 10, which eased fears about a slowdown in AI computing demand. That is how traders read the session. Notably, no company announced a new Micron order on November 11.

The catalyst was language on CoreWeave's earnings call. Chief executive Mike Intrator said: "We are largely sold out through 2027." He added that pricing "has continued to move higher in Q4, more than offsetting cost increases."

The logic chain is straightforward. Sold-out GPU clouds keep ordering servers. Every AI server needs high-bandwidth memory (stacked DRAM chips placed beside the processor) and fast storage. Micron sells both, which makes it a direct beneficiary of sustained AI infrastructure spending.

The memory group moved together. Sandisk (NASDAQ:SNDK) closed up $117.70, or 13.69%, at $977.69, giving it a market value of $139.11 billion. Even after that jump, Sandisk remains far below its 52-week high of $2,354.39, a reminder that the sector rallied hard but still sits well off its peaks.

How long did the JPMorgan milestone last?

Only until the closing bell. After hours, Micron's implied value slipped to roughly $892.6 billion, placing it back below JPMorgan's closing value of $911.91 billion. The crossover, in other words, was a momentary artifact of the regular session rather than a durable reordering of market capitalizations.

The after-hours tape showed broader softness in the memory group. At 7:59 p.m. ET, Micron traded at $788.93, down 2.76%, while Sandisk traded at $951.98, down 2.63%. After-hours trading is thin, and prices can shift before the November 12 open.

Why is $800 still an unsettled level?

Several caveats temper the bullish read. The CoreWeave signal deserves proportion: Intrator sells computing capacity, so strong demand talk directly helps his company, and the call named no memory supplier. The reassurance was inferential, not contractual.

The longer-term numbers cut both ways. Micron is up 184.48% year to date, yet down 17.96% over the past month. Its 52-week range runs from $192.59 to $1,255.00, a span that illustrates the volatility now characteristic of AI-linked hardware stocks. A stock that has risen 184.48% in under a year and fallen 17.46% in a single day is pricing in enormous expectations alongside real risk.

What does Micron's own guidance say?

The company's most recent numbers, issued September 30, frame what the market expects next. Micron guided fiscal first-quarter 2027 revenue to $61.5 billion, plus or minus $1.5 billion, with non-GAAP gross margin of about 86.25% and non-GAAP EPS of $38.15, plus or minus $1.00.

The scale is striking. Revenue for all of fiscal 2026 was $133.19 billion, which means a single quarter's guidance now accounts for a large share of a full year's sales. Margins near 86% are extraordinary for a hardware business, but memory is cyclical, and margins this high tend to attract new supply that eventually pushes prices down.

For now, sold-out AI capacity and that guidance likely outweigh the cycle risk. Micron also carries broader exposure than Sandisk because it supplies both high-bandwidth DRAM and storage, a diversification that has kept memory stocks prominent among the "picks and shovels" of AI infrastructure.

What comes next?

Micron's next earnings report is estimated for December 16, 2026, a date the company has not confirmed. That report is the next hard test of the rebound thesis. If revenue comes in below the low end of the guided range, or if the margin outlook drops, the bullish case for the recovery weakens, and the November 5 selloff could look less like an anomaly than a warning.