Delta Air Lines (DAL) closed at $55.76 on November 17, 2025, falling -4.54% from the previous session. No major company-specific news, announcements, or regulatory filings have been reported for November 18, 2025, or the preceding day by authoritative sources, and the company's investor relations page lists no new updates since October. The sharp decline appears to align with a broader market sell-off, as U.S. equity futures and global indices traded lower amid tech sector weakness and negative sentiment. In the absence of direct Delta news, the price action likely reflects industry and market-wide pressures rather than a Delta-specific event.