Western Digital is trading at $397.01, up 4.23%, as SK Hynix’s record quarterly results and outlook for tight memory supply through 2030 lifted chip and storage shares. - Reporting said the rally reached Western Digital before U.S. markets opened. - No new Western Digital-specific announcement explaining the October 28 move was identified; the broader market was only modestly higher, making semiconductor and AI-related optimism the stronger explanation.