Micron Technology (MU) shares fell 6.63% to $676.60 on May 18, 2026, as investors locked in profits following a 180% year-to-date rally, despite the company's 2026 high-bandwidth memory inventory being fully sold out.
- Market sentiment was pressured by unresolved U.S.-China semiconductor trade restrictions following the recent Beijing summit.
- The decline was further influenced by potential labor disruptions at rival Samsung Electronics and a new technology development from Western Digital.