SoftBank Group shares surged 16% in Tokyo after Nvidia's blowout earnings validated the AI infrastructure boom that Masayoshi Son is betting over $100B on.

Nvidia reports results on Wednesday, as an exceptionally strong first quarter for U.S. corporate profit growth winds down.

SoftBank Group is closely tied to the AI boom through its stake in Arm Holdings, whose chip designs are used in AI servers and data centers powered by Nvidia systems.