Samsung, SK hynix shares slide on CXMT's 4F² DDR5 plans

On Oct. 13 Samsung Electronics fell 4.79% to 238,500 won and SK hynix dropped 5.42% to 1,518,000 won after CXMT said it plans server-grade DDR5 RDIMMs with a 4F² cell by end-2026. Samsung targets mass production of its own 4F² DRAM in 2028. CXMT's global DRAM share reportedly reached 10% in Q2 2026, up from 4% a year earlier.

• Samsung fell 4.79% to 238,500 won; SK hynix dropped 5.42% to 1,518,000 won
• CXMT aims to launch server DDR5 RDIMM with 4F² cell by end-2026
• Samsung targets mass production of 4F² DRAM only in 2028
• CXMT's DRAM market share rose from 4% to 10% in a year