Nvidia stock closes up 7.87% after Jensen Huang said the tech industry's surging capex for AI infrastructure is justified, appropriate, and sustainable (Kif Leswing/CNBC)

Kif Leswing / CNBC: Nvidia stock closes up 7.87% after Jensen Huang said the tech industry's surging capex for AI infrastructure is justified, appropriate, and sustainable   —  The tech industry's surging capital expenditures for AI infrastructure are justified, appropriate and sustainable, Nvidia CEO Jensen Huang said Friday on CNBC's “Halftime Report.”