Micron Technology stock drops after hours as SK Hynix launches $13B AI-memory buildout
NEW YORK, Jan 13, 2026, 16:15 EST — After-hours Micron Technology, Inc. (MU) shares dipped in after-hours trading Tuesday following news that SK Hynix plans to pour 19 trillion won ($12.9 billion) into a new advanced chip-packaging plant in South Korea. Construction is expected to kick off in April and finish by the end of 2027. Micron dropped $7.76, or roughly 2.2%, to $338.11 from a prior close of $345.87; the stock opened at $346.24 and moved between $335.23 and $351.11 during the session. Macquarie Equity Research noted SK Hynix held 61% of last year’s high-bandwidth memory market, well ahead