Investing.com -- Marvell Technology (NASDAQ:MRVL) stock fell 1.9% in afterhours trading Tuesday following a downgrade from TD Cowen analyst Joshua Buchalter, who cited concerns about visibility in the company’s cloud business. The analyst expressed difficulty in validating Wall Street’s fiscal 2027 datacenter estimates due to low visibility in the custom XPU (accelerated computing) segment. The downgrade comes after Marvell shares have surged approximately 30% over the past month, creating what Buchalter describes as a balanced risk/reward scenario. Marvell’s datacenter business has nearly tripled in size over the past two years, driven by initial custom XPU wins and its portfolio of networking silicon supporting AI infrastructure. Related articlesMarvell Technology stock falls after TD Cowen downgrade on cloud visibilityDefensive stocks show deep value as cyclicals run hot, UBS saysSocial media stocks slide as OpenAI launches Sora 2 model and video generation app