Western Digital is trading 5.6% down at $423.56 after renewed selling across memory and semiconductor stocks. - Rising Treasury yields, Federal Reserve rate-hike expectations, oil above $100 per barrel, and renewed Middle East tensions pressured technology valuations. - SK Hynix and Micron declined as Nasdaq weakness and AI-development concerns intensified risk-off trading. - No new company-specific announcement, earnings release, guidance change, or analyst action was identified for September 14, 2026; the decline therefore appears primarily sector- and macro-driven.