Top Big Cap Negative News Movers Premarket:  SpaceX in talks to buy Boost Mobile - Wireless names some volatility  PGEN: -30% Competitor drug gets FDA Approval  KOS: -9% Earnings CHKP: -6% Earnings  RSI: -6% Downgraded to HOLD @ CraigHallum 02-NOV-2026 08:11 AM ET