48 Trillion Vanished in a Day… What Happened to AI Memory Leaders

Micron Technology Inc. (Nasdaq: MU), a U.S. memory‐semiconductor company, plunged 9.57% on the Nasdaq to close at $379.30 on the 4th. Trading volume exceeded 42.16 million shares, and its market capitalization fell to about $426.9 billion—erasing roughly $37.3 billion in value in a single day.

In its first quarter of fiscal 2026, Micron reported revenue of $13.6 billion and earnings per share of $4.78, comfortably beating market expectations. It also issued second‐quarter revenue guidance of $18.3 billion to $19.1 billion, signaling strong growth driven by AI demand. (investors.micron.com)

Recently, the company announced it will suspend shipments of its consumer SSD and memory brand, Crucial, beginning in the second quarter of fiscal 2026. It is reallocating production capacity toward high‐value HBM and data‐center/AI memory products as part of a restructuring effort. (tomshardware.com)

Alongside Samsung Electronics and SK Hynix, Micron is a leading global supplier of DRAM and HBM. It is also the only major memory‐semiconductor firm headquartered in the United States. (tomshardware.com)

Bolstered by high‐bandwidth memory for AI servers and DRAM/NAND for data centers, Micron is making substantial facility investments across the U.S., Taiwan, Japan, and Singapore. The company is widely viewed as a key beneficiary of the mid‐2020s AI‐memory supercycle. (ainvest.com)