Woofun AI data shows that major U.S. equity indices closed lower on July 17, with the Dow Jones down 0.2%, the Nasdaq down 1.47%, and the S&P 500 down 0.51%. The Philadelphia Semiconductor Index dropped 4.3% in a single session, resulting in a cumulative 22% decline from its mid-June high, which officially places the sector in a technical bear market.

Semiconductor and storage-related equities experienced significant losses. SK Hynix ADR fell over 13%, while SanDisk dropped more than 12%. Micron declined over 5%, Western Digital fell over 9%, and Seagate Technology decreased by 10%.