Diane King Hall discusses what's driving Jefferies to upgrade Ford (F) and General Motors (GM) to start a busy trading week. Also on her radar: Seaport Securities downgrading Warner Bros. Discovery (WBD), pointing out regulatory headwinds in its merger with Paramount Skydance (PSKY). Overseas, Diane notes the explosive Shanghai trading debut of Chinese memory chip maker CXMT, which surged 466% on its first day.