Shares of SanDisk fell 6% to $1,484.21 and Seagate Technology fell 4% to $753.21 in early trading after news that ChangXin Memory Technologies, a Chinese DRAM maker not listed in the U.S., made key progress on a denser memory-cell design. The Roundhill Memory ETF (DRAM) dropped 4% to $54.64, while the SPDR S&P 500 ETF Trust was roughly unchanged at $778.75. Neither SanDisk nor Seagate makes DRAM, but memory and storage stocks tend to move together on sector sentiment. The article notes SanDisk was still up 524% year to date through the prior close, reported fiscal Q4 2026 revenue of $8.96 billion (up 371.6% year over year), and guided fiscal Q1 2027 revenue to $10.3 billion to $10.8 billion. A $14 billion buyback addition also lifts its remaining authorization to $15.5 billion.
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