Memory chip stocks fall in premarket; SK Hynix down about 4%

The uniformity of the move — SK Hynix's larger decline alongside roughly parallel drops at Western Digital, SanDisk, Micron and Seagate — points to a sector-wide repricing rather than anything company-specific. That breadth matters because memory names are typically traded as a single cyclical exposure, so a premarket pullback of this shape implies a shared driver rather than individual earnings or guidance news, which the item does not identify. Whether the declines hold through the U.S. open or narrow once regular trading begins is the open question, since premarket moves in this group have limited informational value on their own.