US premarket: memory chip stocks rise; Micron up 2.40%

Broad-based premarket strength across memory names — from Micron and SanDisk to SK Hynix and the storage-focused Western Digital and Seagate — points to a sector-wide move rather than an idiosyncratic story at any single company. That breadth matters because memory pricing and inventory sentiment tend to drive these names together, so a coordinated lift can signal shifting expectations for the group as a whole. The open question is whether the gains hold through the regular session or fade, and whether the move reflects a durable shift in memory demand sentiment or just premarket positioning.