Premarket movers: Mag 7 stocks are all higher (Nvidia +1.2%, Tesla +1%, Apple +0.6%, Amazon +0.4%, Alphabet +0.2%, Microsoft +0.2%, Meta Platforms +0.1%)Amentum Holdings Inc. shares (AMTM) gain 0.4% after BNP Paribas initiated coverage of the engineering firm with a recommendation of underperform as