Stocks opened Thursday's trading day on shaky footing, though a Barclays upgrade for Marvell (MRVL) helped continue 52-week highs for the AI-tied company. Diane King Hall explains what the firm sees as strengths ahead, including Marvell's ties to Nvidia (NVDA). Guggenheim added positive momentum in software with an upgrade in Datadog (DDOG). Diane turns to earnings in Constellation Brands (STZ) as the stock rallies despite guidance concerns.