DISK is trading at $29.00, up 4.20% versus the October 22 close of $27.83; the reason for the move remains unclear. - DISK is a memory-chip ETF with major holdings including SanDisk, Kioxia, SK hynix, and Micron. - Available coverage points to weakness in Asian memory-chip shares, including declines in SK hynix and Samsung, rather than a clear sector-wide rebound.