Nvidia beats estimates, AI stocks rally after hours

Nvidia's beat is a confirmation of sustained AI infrastructure demand, which is why storage and optical names moved in sympathy. The after-hours rally signals that market participants are pricing in continued capex cycles, not just Nvidia's own results. The key watch is whether this demand breadth holds across the supply chain, as that would indicate a structural buildout rather than a one-off beat. Any divergence in future guidance from key suppliers could test this sentiment.