Marvell surged 7% after Amazon signaled plans to sell its custom Trainium AI chips externally, potentially opening a new revenue stream worth ~$50 billion（約8兆円） annually.

What happened: Amazon is in active discussions to sell Trainium AI chips—custom processors it designs and manufactures with Marvell—to outside companies for use in their own data centers. CEO Andy Jassy noted in an April shareholder letter that if the chip business were standalone and sold chips produced this year to AWS and other third parties, the annual run rate would be ~$50 billion（約8兆円）. Marvell Technology stock closed up 7.27% on Thursday on the news.

Why it matters: Marvell is the lead design and manufacturing partner for AWS's Trainium chips, so any expansion of external sales directly benefits the company. The $50 billion（約8兆円） figure signals that Amazon now sees its chip ambitions as a major business opportunity, not simply a tool to cut internal costs. For investors, this suggests a broadening market for custom AI infrastructure rather than a threat from Amazon competing away demand.

What to watch: Marvell will report Q2 results in August, when management commentary on design wins or supply agreements tied to Amazon's Trainium platform is likely to be the focal point. The company was recently added to the S&P 500 and received a $2 billion（約3200億円） investment from Nvidia.