On August 6, Roundhill Memory ETF declined 5.02% overnight, trading at $51.11/share, with turnover of $30.78 million. The sell-off was triggered by disappointing forward guidance from memory chip giants SanDisk and Western Digital.

Both companies reported after-hours on August 5 with results that beat expectations — SanDisk posted revenue of $8.97 billion (up 372% YoY) and adjusted EPS of $39.25. However, SanDisk's next-quarter revenue guidance midpoint of approximately $10.55 billion fell significantly short of the $11.16 billion analyst consensus. Western Digital similarly delivered strong current-quarter results but issued below-consensus guidance. SanDisk fell over 8% after-hours while Western Digital dropped over 11%, dragging memory stocks broadly lower.

Analysts noted this correction reflects an expectation gap in a high-valuation environment. Investors demanded continuously upward-revised outlooks rather than merely strong current results, making the guidance miss the direct catalyst for the sector-wide decline. This follows a volatile week for the ETF, which had surged over 5% the prior session on news that major DRAM producers had sold out all planned capacity through 2027.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)