Big-cap premarket decliners tied to ratings, earnings, wins
Premarket movers cited: ALHC (CMS Star ratings downgrade to Market Perform at Blair); TMUS, T, VZ, VOD, ASTS (each noted after Starling Spectrum win); DAL (earnings); CVS (CMS Star ratings); AAPL (lower iPhone 18 Pro orders on soft demand per Nikkei).