Marvell Technology shares rose 6% to $220.54 on Friday, rebounding from a 4% decline over the past month, a move seen as the unwinding of defensive positions in the AI chip sector. During the same period, Qualcomm's stock edged down 0.33% to $168.01, reflecting its limited exposure to the AI data center segment and declining revenue from its mobile phone business. Marvell's investment case primarily hinges on custom chips and data center connectivity demand, while Qualcomm remains largely dependent on its mobile business. Marvell is scheduled to hold an Investor Day event on October 6, where it may update its custom chip targets and hyperscale data center disclosures, potentially reshaping market expectations.