According to BIT market data, on July 21, Micron Technology rose 10.54%, SanDisk rose 11.77%, Western Digital rose 12.23%, Seagate Technology rose 10.58%, Roundhill Memory ETF rose 9.91%, and SK Hynix ADR rose 10.03%.
U.S. Memory Sector Stocks and ETFs Surge on July 21
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Summary
On July 21, 2026, the U.S. memory sector experienced a sharp rally, with the Fear & Greed Index shifting toward optimism. Micron Technology rose 10.54%, SanDisk increased 11.77%, and Western Digital surged 12.23%. Seagate Technology gained 10.58%, while the Roundhill Memory ETF climbed 9.91%. On-chain data indicated heightened buying activity, and SK Hynix ADR advanced 10.03%.
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