In a dramatic turn for the global semiconductor sector, Micron Technology, the largest memory chipmaker in the United States, has ignited a market rally with its announcement of mass production and commercial shipment of next-generation HBM4 memory. The news, delivered on February 11, 2026, set off a surge in Micron’s stock price and sent ripples through exchanges from New York to Seoul—underscoring the outsized influence of semiconductor innovation on global markets.
Micron’s stock soared by 9.94% to close at $410.34 on the New York Stock Exchange, up $37.09 from the previous day’s close of $373.25, according to TopStarNews. The day saw the stock trade between $386.57 and $414.16, with a staggering volume of over 47.6 million shares and a trading value of $19.1 billion. Even after the bell, investor enthusiasm persisted, pushing the price up another 1.25% to $415.48 in after-hours trading. The company’s market capitalization ballooned to $461.8 billion, reflecting the market’s growing confidence in Micron’s future prospects.
The catalyst for this bullish run? Micron’s official confirmation that it has begun mass production and commercial shipment of HBM4, a high bandwidth memory chip critical for artificial intelligence (AI) and advanced computing applications. Mark Murphy, Micron’s Chief Financial Officer, told industry watchers at the Wolfe Research Conference, “We have started mass production and commercial shipment of HBM4 and are very satisfied with its performance.” This statement, reported by Edaily, helped dispel lingering concerns that Micron was falling behind rivals like SK Hynix and Samsung Electronics in the fiercely competitive HBM market.
Wall Street took notice. Morgan Stanley responded by raising its price target for Micron from $350 to $450, citing the anticipated ramp-up in supply to Nvidia starting in the second quarter and the ongoing supply shortage of HBM chips. Analyst Joseph Moore commented, “Entry into Nvidia’s supply chain will accelerate from Q2, and Micron stands to benefit from continued HBM supply constraints driving up prices.” BNP Paribas echoed this sentiment, suggesting that Nvidia is likely to increase its orders from Micron to balance its supply chain.
The market reaction was swift and broad. The Philadelphia Semiconductor Index jumped over 2% on February 11, continuing a four-day rebound that has seen nearly a 10% rise, as reported by Asia Economy. While tech giants like Microsoft, Alphabet, and Amazon saw their shares dip, semiconductor heavyweights such as TSMC, Lam Research, Applied Materials, KLA, and Intel all posted gains of around 3%. The VANECK Semiconductor ETF (SMH), a bellwether for the sector, climbed 2.71% to $415.73, reflecting investors’ renewed appetite for chip stocks.
Micron’s blockbuster performance had a domino effect on global markets, particularly in Asia. On February 12, the KOSPI index in Seoul opened up 1.32% and climbed to 5,425.56 by 9:02 AM, led by gains in large semiconductor stocks. Han Ji-young, an analyst at Kiwoom Securities, told Maeil Ilbo, “Micron’s stock surge is a positive factor for Samsung Electronics and SK Hynix, and semiconductor stocks are likely to drive the KOSPI’s gains today.” Hana Securities also underscored the semiconductor theme, highlighting domestic chipmakers such as SK Hynix, Samsung Electronics, Hanmi Semiconductor, and others as key beneficiaries of the improved market sentiment.
What’s fueling this optimism? The answer lies in the intersection of surging demand from big tech and the persistent tightness in semiconductor supply. Hana Securities noted, “Semiconductor supply and demand will remain tight through 2026 due to large-scale investments by big tech companies.” The report highlighted that ByteDance, the Chinese tech giant, is in talks with Samsung Electronics to develop AI chips, with plans to produce at least 100,000 units this year. Meanwhile, prices for DRAM and NAND flash memory have been revised upward for the first quarter of 2026, further supporting the positive earnings outlook for chipmakers.
Back in the U.S., the broader market presented a mixed picture. On February 11, the Dow Jones Industrial Average fell by 66.74 points (0.13%) to 50,121.40, the S&P 500 edged down by 0.34 points to 6,941.47, and the Nasdaq Composite slipped by 36.01 points to 23,066.47, according to Asia Economy. However, the S&P 500 managed a slight rise of 0.11% during intraday trading, and Apple and Nvidia bucked the tech slump to post gains of 1.01% and 1.56%, respectively. Robinhood, on the other hand, plunged by 9.59% to $77.39.
Economic data added another layer to the day’s narrative. The U.S. Department of Labor reported that nonfarm payrolls in January increased by 130,000—almost double market expectations—while the unemployment rate dipped to 4.3%. This robust jobs report sent U.S. Treasury yields higher, with the 10-year note rising to 4.174%. As a result, the CME FedWatch tool showed a 93% probability that the Federal Reserve would hold rates steady in March, up sharply from 79.9% the previous day.
Despite these crosscurrents, the semiconductor sector’s rally stood out. Investors shrugged off the broader market’s cautious tone, focusing instead on the transformative potential of HBM4 and the sector’s role in powering AI, cloud computing, and next-generation devices. As one Hana Securities report put it, “With big tech’s large-scale investments this year, semiconductor demand is expected to remain strong, supporting continued tightness in supply.”
Micron’s financials underscore the market’s faith in its prospects. The company’s price-to-earnings ratio (PER) stood at 38.73, with earnings per share (EPS) of $10.60 and a price-to-book ratio (PBR) of 7.86. The dividend per share was $0.46, yielding 0.12%. While the stock remains below its 52-week high of $455.50, it has come a long way from its 52-week low of $61.54—a testament to the company’s turnaround and the sector’s cyclical resurgence.
For now, all eyes are on how Micron and its peers navigate the next phase of the semiconductor cycle. With supply-demand dynamics favoring chipmakers and the AI revolution showing no signs of abating, the stakes—and the rewards—could hardly be higher.