New York, Jan 17, 2026, 17:27 EST — Market closed.
Micron Technology Inc shares (MU.O) closed Friday 7.8% higher, at $362.75. The stock fluctuated from $346.65 to $365.59, with roughly 47.9 million shares traded.
U.S. markets were closed Monday for the holiday, but Micron’s rally puts it near the front of traders’ minds heading into Tuesday. The move also refocuses attention on semiconductor segments linked to data centers, beyond just consumer electronics.
Micron focuses solely on memory — the chips that store data or serve as short-term “working” memory in servers and devices. Its main area of emphasis is high-bandwidth memory (HBM), stacked DRAM located near AI processors to speed up data transfer.
Micron announced Friday it has officially broken ground on a massive $100 billion “megafab” complex in Clay, New York, slated to house up to four fabs. Production is slated to begin in 2030, the company said, with the site forming part of a broader roughly $200 billion expansion plan across the U.S. CEO Sanjay Mehrotra emphasized the move “underscores our commitment to building leading-edge memory at scale in the United States.” Nvidia CEO Jensen Huang, quoted in the same release, called “advanced memory” a critical component. 1
A Form 4 filing revealed that director Teyin Mark Liu acquired 23,200 Micron shares on Jan. 13 and 14, paying roughly $337 per share on average. The total outlay was about $7.82 million. Following these purchases, he held 25,910 shares, the filing noted. 2
Chip stocks held steady on Friday while the major U.S. indexes finished mostly flat, with the Philadelphia semiconductor index rising 1.2%, Reuters reported. The U.S. stock market will be closed Monday in observance of Martin Luther King Jr. Day. 3
Trade policy is resurfacing in the discussion. President Donald Trump signed a proclamation slapping a 25% tariff on select advanced AI chips, Reuters reported Saturday. South Korea’s trade minister noted memory chips are currently excluded but cautioned that a second phase might broaden the tariffs. 4
That said, Micron bulls face a warning. Memory markets run in cycles, and rallies can reverse fast if buyers start to worry prices have peaked or if supply ramps up sooner than anticipated.
Micron’s reopening on Tuesday will carry more weight than the weekend buzz: traders will watch closely for momentum after Friday’s jump. Investors are also zeroing in on signs of DRAM and NAND pricing trends, plus whether major cloud clients are securing extended contracts.
Intel is set to release its earnings after the close on Jan. 22, per Yahoo Finance — a key date that could shake up sentiment across the semiconductor sector. 5
