Key Highlights

● Micron fell 4.98% to $934.27 on Thursday, giving back most of Wednesday's 5.9% jump.

● Trading value reached about $19.6 billion despite below-normal share volume.

● Fiscal fourth-quarter Revenue hit $54.23 billion, up about 379% from a year earlier.

● Guidance calls for fiscal first-quarter revenue of $61.5 billion, plus or minus $1.5 billion.

Why Micron Technology (NASDAQ:MU) ranked third among the most actively traded US stocks on Thursday had more to do with the size of its share price than with any single piece of company news. The memory chipmaker fell 4.98% to $934.27, giving back most of Wednesday's 5.9% jump, on 21.03 million shares. That Volume was below normal, with a relative volume reading of 0.79, but at a share price near $1,000 it still added up to about $19.6 billion in trading value. The selling came as megacap tech Earnings rattled the market, results from memory rival Samsung drew mixed reactions, and traders took profits after a four-day rally.

A tech-led pullback

Micron had closed at $983.23 on Wednesday, its fourth straight gain and up nearly 15% from its October 22 close of $856.49, according to one report. Shares slipped in after-hours trading Wednesday and opened about 3% lower on Thursday, according to market commentary. They touched a low of $927.24 during the session.

Another report linked the move to profit-taking after a large 2026 rally and to weaker-than-expected results from Samsung and Alphabet (NASDAQ:GOOGL), which pressured memory and technology shares. Alphabet's 12% plunge, driven by slowing search growth and a Capital spending surge that pushed its free Cash Flow negative, dragged the Nasdaq Composite down 1.38%, and the Philadelphia Semiconductor index fell 1.42%, with 20 of its 30 members declining, according to market commentary. Other memory names fell alongside Micron: Sandisk (NASDAQ:SNDK) dropped 5.32% in the same session.

Samsung's quarter itself was very large. Samsung reported third-quarter revenue of 195.3 trillion won and operating profit of 107.4 trillion won, with 106.5 trillion won coming from its chip division, according to one report, although reports differed on how those numbers compared with expectations. For investors in a stock that has climbed about fivefold from its 52-week low, the bar for good news is now very high.

What Micron does

Micron, based in Boise, Idaho, is the largest US maker of memory chips. It produces DRAM, including the high-bandwidth memory stacked next to AI accelerators in Data Center systems, and NAND flash used in solid-state drives, phones and PCs. The company competes mainly with South Korea's Samsung and SK hynix. Micron is a member of the S&P 500, the Nasdaq-100 and the Russell 1000. It is not a component of the Dow Jones Industrial Average.

Record results and a bigger outlook

Micron's most recent report, for its fiscal fourth quarter, was released on September 30. Revenue reached $54.23 billion, up about 379% from a year earlier and ahead of the roughly $51.33 billion analysts expected, according to market data. Earnings Per Share were $33.42, compared with a consensus of $31.77 and $3.03 in the year-ago quarter.

Guidance pointed to more growth. For the fiscal first quarter of 2027, Micron forecast revenue of $61.5 billion, plus or minus $1.5 billion, an adjusted gross Margin of about 86.25% and adjusted EPS of $38.15, plus or minus $1.00, according to one report. The company said it has 26 strategic customer agreements and that more than 75% of its fiscal 2027 shipments are already committed. Another report said Micron expects memory markets in 2027 and 2028 to be tighter than in 2026, and that it is signing long-term Supply agreements with price floors and ceilings designed to smooth out revenue.

The pricing backdrop has been extraordinary. One report cited industry data showing NAND prices up about fivefold in a year. Across the industry, SK hynix reported third-quarter revenue of 104.6 trillion won and an Operating Margin of about 80%, and its chief financial officer said he expects supply to fall short of Demand through 2030.

Valuation

Market data put Micron at about 12.6 times trailing earnings of $74.21 per share, with a Market Value of about $1.06 trillion. Because earnings are rising so quickly, the forward multiple is much lower: one report cited about 5.2 times forward earnings, compared with roughly 19.2 times for the S&P 500. On the same session data, Sandisk traded at about 18.3 times trailing earnings, Nvidia (NASDAQ:NVDA) at 27.0 and AMD (NASDAQ:AMD) at about 145. Memory stocks have historically traded at low multiples near the top of the cycle, because investors expect today's earnings to fall when supply catches up.

The shares remain well off their highs. Micron hit an intraday high of $1,255.00 on June 25 and last closed above $1,000 on October 9, according to market commentary. The 52-week low is $192.59. Thursday's close left the stock below its 50-day Moving Average of about $981 but far above its 200-day average of about $739, according to market data. The Balance Sheet carries little leverage, with a Debt-to-Equity Ratio of about 0.03, and Micron pays a quarterly Dividend of $0.15 per share, a Yield of roughly 0.1% at current prices.

The bull and bear cases

Supporters point to contracted demand. With most of next year's output already committed, long-term agreements in place and both major Korean rivals describing tight supply, the bull case is that this upcycle will last longer and swing less than earlier ones. Wall Street remains largely positive: market data counts 42 Buy or Strong Buy ratings against four Holds, with an average price target of about $1,408. Recent targets include $1,625 from one brokerage and $1,500 from another.

The bear case is the memory cycle itself. Micron, Samsung and SK hynix are all adding capacity, with much of the new supply arriving from mid-2027 through 2028, and memory booms have historically ended in sharp price declines. One report listed customer pushback on prices, weaker device sales because of higher memory costs, and any pause in hyperscaler spending as risks. Investors are also watching AI capital budgets closely: Alphabet plans to raise spending sharply next year, while Microsoft (NASDAQ:MSFT)'s quarterly capex came in below forecasts because of delayed capacity. Insider selling has drawn attention as well. Market data showed that insiders sold 83,545 shares worth about $78.5 million over the past quarter, including sales by Chief Executive Sanjay Mehrotra in August.

What to watch next

The next major catalyst is Micron's fiscal first-quarter report, which one source estimates for around December 16, a date the company has not confirmed. Before then, investors will follow memory contract pricing, the capex plans of the largest cloud companies, and further results across the semiconductor supply chain. Price levels traders are watching include the $1,000 mark and the October 22 low of $849.25. Thursday's move showed how sensitive the stock remains to shifts in AI spending sentiment, even while Micron's own guidance points to another quarter of record results.