Storage and memory shares diverged sharply from the broader market Friday afternoon, with the Roundhill Memory ETF (CBOE:DRAM) rising 5% to $59 while the SPDR S&P 500 ETF Trust (NYSEARCA:SPY) fell 0.4% to $770. SK Hynix stock climbed 7% to $174.38, Seagate Technology Holdings gained 5% to $837.23 and Western Digital was cited at $461.02, up 4%. The move broadened an initial NAND rally into DRAM and hard drives, linking higher-bandwidth AI memory with the mass-storage systems used to retain AI-generated data. SK Hynix’s latest preliminary quarterly report showed revenue of KRW 79.32 trillion, up 256.8% year over year, and operating profit of KRW 60.54 trillion. Seagate reported fiscal fourth-quarter 2026 revenue of $3.63 billion, up 48.5% year over year, and non-GAAP earnings per share of $5.71, while guiding fiscal first-quarter 2027 revenue to $4.1 billion, plus or minus $100 million. The source frames the rally as a broad repricing of the memory cycle rather than a response to fresh company-specific announcements. It also notes that Seagate has gained 204% year to date and Western Digital 168% year to date, while SK Hynix is up 22% over the past month. Investors are advised to monitor whether the DRAM ETF remains above $58 and whether hard-drive shares hold their gains through further hyperscaler capital-expenditure commentary.